BMW Suspension Parts for BMW E46 M3 S54 (1999-2005)

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Your BMW's handling is determined by the capabilities and age of your suspension components. Our selected aftermarket performance suspension like coilovers, lowering springs, cup kits, and dampers can improve the handling of your BMW dramatically. With those upgrades comes the needs for proper adjustment; our recommended supporting modifications comes stiffer sway bars, bushings, and adjustable camber/caster plates, to name a few found on this page. Completely build your suspension for the most competitive BMW driving experience, achieve your perfect look, or simply replace your worn suspension with our recommended parts.

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CTA Tools - Corporate Logo
T#:1211223
Part#: CTA3039X06
In Stock
$ 9.99 USD
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Used to properly tighten strut nuts
CTA Tools - Corporate Logo
T#:1211222
Part#: CTA3039X03
Ships on Sep 23, 2026
$ 9.99 USD
Free Shipping on orders $49 and up
Used to properly tighten strut nuts
CTA Tools - Corporate Logo
T#:1211226
Part#: CTA3039X05
Ships on Sep 23, 2026
$ 9.99 USD
Free Shipping on orders $49 and up
Used to properly tighten strut nuts

Powerflex Black Series - Corporate Logo
T#:376781
Part#: PFBK-E46M3CR
Ships in 2 Business Days
$ 1,061.99 USD
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$ 1,061.99 USD
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Transform the way you vehicle handles and feels with this kit that includes every powerflex bushing for the E46 M3 coupe, the suspension bushing will unless the true potential of you're vehicles suspension, while the drive train bushing will help control the power you put to the ground. In essence this is how you're car should feel.
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Powerflex Black Series - Corporate Logo
T#:376780
Part#: PFBK-E46M3R
Ships in 2 Business Days
$ 1,065.99 USD
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$ 1,065.99 USD
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BMW E46 M3 Performance Polyurethane Bushing Kit enhances your vehicle's handling and performance significantly. This comprehensive kit from Powerflex includes every bushing needed for the E46 M3 coupe, optimizing suspension dynamics and drivetrain control. Experience the true potential of your BMW's suspension and feel the power transfer more efficiently with this essential upgrade.

  • Improves vehicle handling and responsiveness.
  • Enhances suspension stability and control.
  • Made from durable polyurethane for longer lifespan compared to OEM rubber.
  • Ideal for street and occasional track use.
  • Includes all necessary bushings for a complete upgrade.

Powerflex, Europe's top suspension bushing manufacturer, utilizes advanced polyurethane materials and precise manufacturing techniques to ensure superior performance and durability. Their products are backed by a lifetime warranty to the original purchaser, demonstrating their commitment to quality and reliability.

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CTA Tools - Corporate Logo
T#:48573714
Part#: 7513
In Stock
New Item
$ 10.99 USD
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Why a strut nut socket? To secure shocks and struts to their mounts, the retaining nut must be torqued to its proper specification using a torque wrench. Strut nut sockets allow for the use of a 21mm wrench to hold the damper shaft allowing you to achieve proper torque. An improper torque value may result in premature mount failure - or worse.
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Mubea - Corporate Logo
T#:13200578
Part#: 31336767376
Ships on Sep 30, 2026
$ 92.99 USD
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$ 92.99 USD
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Genuine BMW Motorsport - Corporate Logo
T#:338369
Part#: 33327749778
Ships on Oct 7, 2026
Starting at $ 198.94 USD
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Starting at $ 198.94 USD
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Designed and built in-house at BMW Motorsport, these are stock rear camber arms from the E36 M3 that have been strengthened by welding a reinforment in between the wishbones. Stiffer than the stock units and still adjustable for camber. This arm is legal in many racing classes where an aftermarket arm is not permitted. Sold individually, two required per car.

For maximum adjustment solid aluminum camber arms, you may also want to check out our TMS E36/E46 Adjustable Rear Camber Arms .

This arm does not include a bushing, but you may choose add a bushing using the drop down below. For an additional charge, you can get the bushing pre-pressed into the arm, so it is ready to install on the car (no added shop time or hydraulic press required).

Sold Individually.
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Mubea Rear Coil Spring - E46
For coupe models only
Mubea - Corporate Logo
T#:383171
Part#: 33532283136
In Stock
$ 98.99 USD
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$ 98.99 USD
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Replace your cracked springs

Bremmen Parts - Corporate Logo
T#:640138
Part#: 33321092247
In Stock
Sale - Save 19% $ 7.99

This product was last offered at the strikethrough price on
06-25-2026

$ 6.49 USD
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Sale - Save 19%
$ 7.99

This product was last offered at the strikethrough price on
06-25-2026

$ 6.49 USD
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This is the replacement rear upper control arm inner bushing. (sold individually) Bushings tend to wear over time and split or even break free from the internal sleeve, causing excessive movement and sloppy control feel. OEM Lemförder bushings are the perfect option to restore suspension back to day 1 quality.
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Spring Seat
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:16907175
Part#: 31331096664
Ships on Dec 3, 2026
$ 10.99 USD
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$ 10.99 USD
Free Shipping on orders $49 and up
This pad is used as a bushing between the spring and strut. After time the pad wears down and causing front end noise.
Bavarian Autosport - Corporate Logo
T#:579685
Part#: 50259
Special Order: No Guaranteed ETA
Sale - Save 20% $ 25.99

This product was last offered at the strikethrough price on
05-03-2026

$ 20.79 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 25.99

This product was last offered at the strikethrough price on
05-03-2026

$ 20.79 USD
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Rear subframe bushings are a common failure point, creating a clunking condition and unwarranted subframe shifting under load. Replace your bad bushings with these new units from Bavarian Autosport.


Lemforder - Corporate Logo
T#:361895
Part#: 33552283743
Ships on Mar 1, 2027
$ 20.99

This product was last offered at the strikethrough price on
04-08-2026

$ 11.99 USD
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$ 11.99 USD
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Sway bar end links connect the swaybar to the rest of the suspension, preventing body roll and keeping everything in line in tight turns. This exposes these links to a high amount of stress and pressure, often leading to split bushings and sloppy body control and knocking noises. OEM Lemförder sway bar links are the perfect option to restore body control and eliminate knocking noises.

OEM Lemförder is an engineering company that focuses on high-quality, precision manufacturing of critical suspension and steering components. Providing exceptionally high quality parts directly to BMW, as well as 50+ other big name automotive companies, such as Mercedes and Audi, their history of reliability and variety of offered parts makes them one of the biggest names for a go-to OEM parts provider. Lemförder parts place an important emphasis on design, production, and assembly, ensuring maximum reliability. They even coat all parts possible with corrosion protection for extended longevity.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Bavarian Autosport - Corporate Logo
T#:579821
Part#: 52501
Special Order: No Guaranteed ETA
Sale - Save 20% $ 19.99

This product was last offered at the strikethrough price on
05-03-2026

$ 15.99 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 19.99

This product was last offered at the strikethrough price on
05-03-2026

$ 15.99 USD
Free Shipping on orders $49 and up
Lemforder - Corporate Logo
T#:12527
Part#: 33521092362
Ships on Mar 1, 2027
$ 19.99

This product was last offered at the strikethrough price on
08-04-2026

$ 10.99 USD
Free Shipping on orders $49 and up
$ 10.99 USD
Free Shipping on orders $49 and up

Strut mounts can begin to wear and fail over time, causing a knock in the suspension to occur. Replace yours with a high quality OEM Lemförder replacement to ensure a tight, noise-free ride.

OEM Lemförder is an engineering company that focuses on high-quality, precision manufacturing of critical suspension and steering components. Providing exceptionally high quality parts directly to BMW, as well as 50+ other big name automotive companies, such as Mercedes and Audi, their history of reliability and variety of offered parts makes them one of the biggest names for a go-to OEM parts provider. Lemförder parts place an important emphasis on design, production, and assembly, ensuring maximum reliability. They even coat all parts possible with corrosion protection for extended longevity.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Genuine BMW - Corporate Logo
T#:372570
Part#: 31122229624KT3
Ships on Mar 1, 2027
$ 3,132.99 USD
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$ 3,132.99 USD
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BMW E46 M3 Front Suspension Refresh Kit by ECS Tuning is designed to restore and enhance your BMW’s suspension for a smooth and precise driving experience. This Level 2 refresh kit addresses common suspension wear issues and includes upgraded components to provide superior performance and extend the life of your BMW E46 M3’s suspension system.

  • Restores precision steering feel and eliminates shaking or vibrations during braking
  • Reduces squeaking, whining, or grinding noises from the front suspension, improving ride quality
  • Includes upgraded components that provide better-than-new performance for long-lasting results
  • Complete kit with essential parts, including control arms, bushings, sway bar end links, tie rod assemblies, and strut mounts
  • Strut mount reinforcement plates included to prevent strut tower deformation and cracking
  • Engineered for BMW E46 M3 models, ensuring seamless fitment and reliable performance

For those looking to improve their BMW E46 M3’s suspension beyond factory specifications, this refresh kit offers enhanced durability, stability, and handling, keeping your ride safe and smooth on the road.

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Febi Ball Bearing For Strut Mounting
We Price Match - Give Us A Call or Chat!
Febi - Corporate Logo
T#:16375125
Part#: 31331090612SK
Special Order: No Guaranteed ETA
$ 16.99 USD
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$ 16.99 USD
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These replacements from Febi are the perfect solution for worn mounts/bearings. Because they are factory OE parts, they fit perfectly in the mounting location and are the proper length and have the correct inside diameter for your struts. A small addition to any front suspension overhaul that can make a huge difference in overall ride quality. Priced each, but should always be replaced in pairs. To get the most out of your new suspension setup, it's recommended that you replace all parts that are known to fail. Not only will this make your new setup more effective, it will provide a better ride, proper tire position, and make all of your parts last longer. One often overlooked piece is the upper strut bearing and mount. This is the top mount for your struts and provides a solid platform for your front suspension. If worn, the bearings within this mount make noise, there is slop from worn rubber, and it can shorten the life of your shocks.
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Corteco - Corporate Logo
T#:15478733
Part#: 33321092247
Back Ordered
$ 11.99 USD
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If you're experiencing a less than stellar ride, a shaky steering wheel or suspension noise, your control arm bushings might need replaced.

BC Racing - Corporate Logo
T#:4333503
Part#: I-14-RM-O
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$ 1,495.00 USD
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$ 1,495.00 USD
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BC Racing has made a name for themselves in the automotive enthusiast communities by developing adjustable, street-and-track capable coilover kits for over a decade that are not only extremely effective, but also don't brake the bank! The BC Racing RM Series Coilover System uses a mono-tube inverted damper in the front and rear of vehicles that use McPherson style OEM strut suspension. On vehicles that use front struts only, BC Racing provides an inverted front strut and then provides an upright BR Series damper for the rear. Inverted dampers are useful in decreasing unsprung weight by moving the greatest mass of the strut to the top where it connects to the sprung weight of the chassis, where weight can be more easily shaved. The RM series feature high quality damping adjustable monotube inverted dampers at the front or front and rear, depending on vehicle. The RM coilovers offer the majority of the features of the BR series but with the additional benefit of the inverted damper unit. Inverting the damper unit brings with it a number of advantages. The large 42mm damper rod and inverted design gives the inverted damper units much greater strength and resistance to side loadings. By reducing flex the RM inverted units lead to more consistent steering geometry resulting in more predictable and responsive handling. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Highly Customizable Inverted Mono-Tube Damper Linear Piston And Damping Curve Height Adjustment Independent Of Spring Compression 30-Clicks Of Simultaneous Compression/Rebound Adjustment Front Camber Plates Standard On Applicable Kits Rear Camber Plates Available For Applicable Kits Custom Spring Rates And Swift Spring Compatible Custom Valving Or Valving Paired For Custom Spring Rates 1-Year Warranty Against Manufacturers Defect Fully Rebuildable NOTE: LEAD TIMES WILL BE 4-8 WEEKS.
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Suspension Techniques - Corporate Logo
T#:599124
Part#: 18220023
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$ 1,399.00 USD
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$ 1,399.00 USD
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Designed in conjunction with KW Germany, ST XA coilovers deliver a sporty handling by reducing the car’s bodyroll during compression as well as improving agility when driving fast. The high-quality production of each ST XA coilover includes a low-friction and pressure resistant housing alongside a chrome-plated piston rod for maximum longevity. A mono block guide and ST seal package ensures the twin-tube dampers remain free of dirt particles in all weather conditions.
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Corteco - Corporate Logo
T#:15478715
Part#: 33326775551
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$ 27.99 USD
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This bushing is located in the axle housing, connecting to the trailing arms. Fits both left & right side.

KW Suspension - Corporate Logo
T#:348849
Part#: 35220825
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$ 4,744.00 USD
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$ 4,744.00 USD
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Tailored for track performance, the KW Clubsport Coilover Kit offers exceptional adjustability, catering to enthusiasts who desire precise ride quality adjustments according to varying loads, tire setups, and other driving factors.

Product Benefits:

  • Ideal for track performance
  • Abundant adjustability options
  • Precision in ride quality adjustments
  • Customizable settings for load, tires, and driving conditions
  • Enhanced handling and responsiveness
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BC Racing - Corporate Logo
T#:4333520
Part#: I-14-ZR-O
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$ 2,835.00 USD
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$ 2,835.00 USD
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BC Racing's new ZR Series Coilovers bring a 3-way adjustable track ready coilover system to racers from novice to pro for a price not seen before in the performance suspension market. Each ZR Series Coilover system offers independent low speed and high speed compression adjustment and separate rebound adjustment. They also offer full height adjustability independent of piston travel and spring preload. On cars with McPherson struts the ZR Series comes standard with an inverted monotube damper with the steel braided Teflon coated line exiting the top of the damper to the external reservoirs that can be remotely mounted in the engine bay or boot. The ZR Series kits offer 30 clicks of rebound adjustment, 15 clicks of low speed compression adjustment, and 12 clicks of high speed compression. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: * 3-way adjustable damping controls * External reservoir * Engineered for 100% track use * Inverted damper design. (depending on models) * Dual Piston design. (1 in res., 1 in shock) * Teflon coated steel braided lines for external reservoir on inverted dampers and solid stem for double A-arm cars * Custom spring rates available * Completely rebuildable * Monotube damper design * Patented concave lower locking collar * 1 year manufacturer warranty
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Air Lift - Corporate Logo
T#:22591957
Part#: 27718
Back Ordered
$ 1,045.00 USD
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Introducing the Air Lift Performance 3S Air Management Kit

The Air Lift Performance 3S is a groundbreaking air management kit that takes performance to the next level. This kit includes a manifold and a basic wiring harness, providing the flexibility to be installed in conjunction with separately purchased components. It is compatible with both 1/4” and 3/8” air lines, offering various kit versions to cater to different displays and switch boxes or exclusive use with the ALP3 app. Whichever version you choose, seamless integration with the ALP3 app is guaranteed.

Components to be purchased separately include:

  • Air springs
  • Water trap
  • Controllers (e.g., AVS switchbox)
  • Fittings/air lines
  • Compressor
  • Insulated copper wires in 10-, 12-, 18-, and 20-gauge
  • Tank wire, connectors, terminals, butt splices
  • Pressure switch fuse/holders
  • Relay
  • Schrader valve and blow-off valve

Additionally, there are versions of the 3S kit available with the Air Lift Performance V2 or ALP3 controller or just the smartphone app for added convenience.

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BC Racing - Corporate Logo
T#:4333551
Part#: I-14-ER-O
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$ 1,935.00 USD
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$ 1,935.00 USD
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The ER Series coilovers bring with them the high quality and unique features seen on the BR and RM type but have the additional benefit of external reservoirs and the ability to allow the end user to individually adjust and set compression and rebound damping rates. By separating the adjustment for damping compression and rebound the ER Series allows you to dial the vehicle in to your exact needs. When braking hard whilst approaching a corner you want the car to transfer weight to the front tires to maximize grip for the braking effort and also to allow you to trail brake into the corner without the car understeering. Ride height adjustment: Ride height is determined by the position of the coil over bottom mount. The mount can be wound up and down the damper body to give a full range of adjustment. Because ride height is determined by an adjustable bottom mount rather than spring platform you retain full damper travel regardless of the ride height run. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminium components (top mounts, locking collars etc) are anodised and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Highly Customizable Mono-Tube Damper Linear Twin-Piston Design Height Adjustment Independent Of Spring Compression 30-Clicks Of Compression Adjustment Via The External Reservoirs 30-Clicks Of Rebound Adjustment From The Top Of The Damper Front And Rear Camber Plates Standard On All Applicable Kits Front And Rear Pillowball Mounts Standard When Camber Plates Do Not Apply Custom Spring Rates And Swift Spring Compatible Custom Valved To Match The Drivers Requested Spring Rates Swift Spring Upgrade Available On Most Applications 1-Year Warranty Against Manufacturers Defect Fully Rebuildable NOTE: LEAD TIMES ON ALL NEW ORDERS 4-8 WEEKS
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BC Racing - Corporate Logo
T#:4333550
Part#: I-14-ER-C
Back Ordered
$ 1,935.00 USD
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$ 1,935.00 USD
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The ER Series coilovers bring with them the high quality and unique features seen on the BR and RM type but have the additional benefit of external reservoirs and the ability to allow the end user to individually adjust and set compression and rebound damping rates. By separating the adjustment for damping compression and rebound the ER Series allows you to dial the vehicle in to your exact needs. When braking hard whilst approaching a corner you want the car to transfer weight to the front tires to maximize grip for the braking effort and also to allow you to trail brake into the corner without the car understeering. Ride height adjustment: Ride height is determined by the position of the coil over bottom mount. The mount can be wound up and down the damper body to give a full range of adjustment. Because ride height is determined by an adjustable bottom mount rather than spring platform you retain full damper travel regardless of the ride height run. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminium components (top mounts, locking collars etc) are anodised and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: Highly Customizable Mono-Tube Damper Linear Twin-Piston Design Height Adjustment Independent Of Spring Compression 30-Clicks Of Compression Adjustment Via The External Reservoirs 30-Clicks Of Rebound Adjustment From The Top Of The Damper Front And Rear Camber Plates Standard On All Applicable Kits Front And Rear Pillowball Mounts Standard When Camber Plates Do Not Apply Custom Spring Rates And Swift Spring Compatible Custom Valved To Match The Drivers Requested Spring Rates Swift Spring Upgrade Available On Most Applications 1-Year Warranty Against Manufacturers Defect Fully Rebuildable NOTE: LEAD TIMES ON ALL NEW ORDERS 4-8 WEEKS
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BC Racing - Corporate Logo
T#:4333519
Part#: I-14-ZR-C
Back Ordered
$ 2,835.00 USD
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$ 2,835.00 USD
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BC Racing's new ZR Series Coilovers bring a 3-way adjustable track ready coilover system to racers from novice to pro for a price not seen before in the performance suspension market. Each ZR Series Coilover system offers independent low speed and high speed compression adjustment and separate rebound adjustment. They also offer full height adjustability independent of piston travel and spring preload. On cars with McPherson struts the ZR Series comes standard with an inverted monotube damper with the steel braided Teflon coated line exiting the top of the damper to the external reservoirs that can be remotely mounted in the engine bay or boot. The ZR Series kits offer 30 clicks of rebound adjustment, 15 clicks of low speed compression adjustment, and 12 clicks of high speed compression. Know your protected from the elements! The damper units are black chromed steel to give superb durability even through the darkest of European winters. The aluminum components (top mounts, locking collars etc.) are anodized and the steel lower mounts go through an electrophoretic disposition process followed by powder coating. A random selection of steel components (brackets, dampers, screws etc.) are put through a salt spray test once a month to check the quality of the protective processes and that anti corrosive properties are kept at the highest possible standard. Features: * 3-way adjustable damping controls * External reservoir * Engineered for 100% track use * Inverted damper design. (depending on models) * Dual Piston design. (1 in res., 1 in shock) * Teflon coated steel braided lines for external reservoir on inverted dampers and solid stem for double A-arm cars * Custom spring rates available * Completely rebuildable * Monotube damper design * Patented concave lower locking collar * 1 year manufacturer warranty
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Rein - Corporate Logo
T#:363435
Part#: 33321092247
Back Ordered
$ 28.99 USD
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Upper control arm to subframe bushing

BC Racing - Corporate Logo
T#:51356016
Part#: I-121-ZX
Back Ordered
New Item
$ 2,595.00 USD
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$ 2,595.00 USD
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For the E46 M3 Convertible enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ZX Series offers an unparalleled engineering approach. By moving the compression valving to the external canisters, the system maintains its integrity under high-stress, high-temperature conditions, effectively eliminating "damper fade." For the E46 M3 platform—especially the convertible which requires higher roll stiffness to compensate for chassis flex—the ZX Series' 12kg rear spring rate and advanced damping provide the stability needed to maintain a flat cornering attitude. The system features standard front pillowball camber plates to eliminate factory rubber "mush," providing direct and unmediated steering feedback to the driver. Key Features: Enhanced Thermal Management: External canisters keep fluid away from brake heat to maintain valving accuracy lap after lap. Camber Adjustable Top Mounts: High-quality aluminum alloy plates allow for aggressive track alignments to maximize the tire contact patch. Pillowball Rear Mounts: Replaces rubber bushings with solid spherical bearings (on applicable kits) for increased response and precision. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme track vibration. Fully Rebuildable: Every component is individual and replaceable, making this a long-term investment in the car's competitive potential. Specifications: Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis). Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm (Swift Springs standard). Piston Design: Linear Twin-Piston with remote canister valving. Adjustment Range: 3-Way Independent (Rebound / Low-Speed Compression / High-Speed Compression). Warranty: 1-Year limited manufacturer's warranty.
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BC Racing - Corporate Logo
T#:51355987
Part#: I-121-DS
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$ 1,415.00 USD
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$ 1,415.00 USD
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The BC Racing DS Series for the E46 M3 Convertible is built using motorsport-grade materials designed to withstand the rigors of spirited driving and technical road courses. Because the E46 M3 platform benefits greatly from increased front camber, this kit comes standard with front pillowball camber plates. These plates replace the compliant factory rubber mounts, providing unmediated feedback to the driver and allowing for aggressive alignment settings to maximize tire contact patches. Every DS Series kit is hand-assembled and fully rebuildable, with the option to upgrade to Swift Springs for even more consistent spring rates and reduced weight. Whether you're carving canyons or attending a weekend track day, the DS Series provides the stability and feedback needed to push the E46 M3 chassis to its limits. Key Features: Front Camber Plates: Precision-engineered aluminum alloy plates for surgical alignment and increased turn-in bite. Patented Locking Ring: Features a concave lower locking ring that prevents the system from vibrating loose even under track conditions. Bearing-Mounted Spring Platforms: Minimizes "spring binding" or popping during low-speed steering maneuvers. Fully Rebuildable: Every component, from the seals to the valving, is individual and replaceable for long-term serviceability. Customization Ready: Fully compatible with custom spring rates and Swift Spring upgrades for tailored track setups. Specifications: Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis). Spring Rates (Default): Front: 7 kg/mm | Rear: 12 kg/mm. Spring Type: High-strength SAE9254 cold-wound steel. Adjustability: Independent ride height, independent spring preload, and 30-way damping. Warranty: 2-Year limited manufacturer's warranty.
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BC Racing - Corporate Logo
T#:51355992
Part#: I-121-ER
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New Item
$ 1,955.00 USD
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$ 1,955.00 USD
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For the E46 M3 enthusiast looking to bridge the gap between a high-end street car and a dedicated race machine, the BC Racing ER Series offers a "motorsport-first" engineering approach. By moving the secondary damping piston to the external canister, the system maintains its integrity under high-stress conditions. This is especially beneficial for the M3 Convertible, where the high 12kg rear spring rate helps counteract the platform's inherent weight and chassis flex, providing a flat and predictable cornering attitude. The system includes front pillowball camber plates as standard, eliminating the compliant factory rubber bushings to provide direct, unmediated steering feedback and allowing for aggressive track-ready alignment settings. Key Features: Reduced Damping Fade: External canisters keep fluid cooler by increasing the distance from hot brake components. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for surgical alignment and increased turn-in bite. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme vibration. Linear Piston Architecture: Provides a predictable and consistent damping feel for better driver confidence at the limit. Serviceable Construction: All components are individual and fully replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW M3 (E46) Convertible / Coupe. Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm. Spring Type: High-strength SAE9254 cold-wound steel. Construction: Black chrome-plated steel bodies for maximum corrosion resistance and anodized 6061-T6 aluminum. Warranty: 1-Year limited manufacturer's warranty.
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Powerflex Black Series - Corporate Logo
T#:376580
Part#: PFF5-4602-30.8B2
Ships in 2 Business Days
$ 95.99

This product was last offered at the strikethrough price on
05-27-2026

$ 78.99 USD
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$ 78.99 USD
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Sway bars transmit cornering forces from the outside wheels to the inside wheels, helping to keep the vehicle flat during cornering. This, in turn, reduces body roll and improves the driver's cornering confidence. OEM rubber sway bar bushings are designed with comfort in mind, allowing the sway bar to articulate while permitting additional movement, leading to less-than-ideal bar retention and causes unnecessary body roll.

Powerflex polyurethane sway bar bushings are firmer than factory rubber bushings, reducing body roll and keeping sway bars in check. Polyurethane bushings won't slop around like OEM bushings, allowing sway bars to function at their fullest potential.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

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BC Racing - Corporate Logo
T#:51355994
Part#: I-121-HM
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$ 2,565.00 USD
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$ 2,565.00 USD
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For the E46 M3 Convertible owner who demands uncompromised geometry control, the BC Racing HM Series offers a motorsport-first engineering solution. By utilizing an inverted strut layout with a much larger internal piston shaft, the HM Series excels in maintaining wheel alignment during extreme lateral cornering—a critical factor for the MacPherson strut-equipped M3. The addition of external reservoirs ensures the damping fluid remains cool, preserving valving accuracy lap after lap. Standard front pillowball camber plates eliminate factory rubber "mush," providing direct and unmediated steering feedback. Because convertibles often require higher roll stiffness to compensate for chassis flex, the HM Series’ 12kg rear spring rate provides the stability needed to keep the car planted and responsive. Key Features: Enhanced Side-Load Resistance: The inverted design handles high lateral loads longer than traditional upright dampers without fatigue. Reduced Damper Fade: External canisters move fluid away from brake heat to maintain consistent lap times. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for surgical alignment and increased turn-in bite. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked even under track conditions. Fully Rebuildable: All components are individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW M3 Convertible (E46 Chassis). Spring Rates (Standard): Front: 8 kg/mm | Rear: 12 kg/mm (Swift Springs). Hardware: Black chrome-plated steel shock bodies and 6061-T6 aluminum components. Adjustment Type: Independent ride height, spring preload, and 2-way damping. Warranty: 1-Year limited manufacturer's warranty.
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BC Racing - Corporate Logo
T#:51355989
Part#: I-121-RM
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$ 1,515.00 USD
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$ 1,515.00 USD
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For the E46 M3 Convertible owner who demands uncompromised feedback during spirited driving or track sessions, the BC Racing RM Series offers a professional-grade motorsport approach. By moving the fluid reservoir away from the wheel hub and brake components, the RM Series manages heat more effectively, preventing damper fade during prolonged high-speed sessions. The inclusion of front pillowball camber plates replaces compliant factory rubber bushings, providing direct and unmediated steering feel. Because convertibles often require higher roll stiffness to compensate for chassis flex, the RM Series' default 12kg rear spring rate provides the stability needed to keep the E46 M3 planted and responsive through tight technical sections. Key Features: Reduced Damper Fade: Inverted layout keeps oil temperature more stable by increasing distance from hot brake components. Camber Adjustable Top Mounts: Precision-engineered aluminum plates allow for aggressive alignment specs to maximize front-end grip. Patented Concave Locking Ring: Unique design ensures that once ride height is set, the lower mounts remain locked securely against vibration. Linear Piston Architecture: Provides a predictable and consistent damping feel for better driver confidence at the limit. Fully Rebuildable: Every component is individual and replaceable, ensuring the long-term serviceability of the system. Specifications: Vehicle Fitment: 2000–2006 BMW M3 (E46) Convertible / Coupe. Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm. Optional Upgrades: Compatible with custom spring rates and Swift Springs (+2kg/-2kg range on standard valving). Finish: Black chrome-plated steel bodies for maximum corrosion resistance. Warranty: 2-Year limited warranty against manufacturer's defects.
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BC Racing - Corporate Logo
T#:51356002
Part#: I-121-ZR
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$ 2,865.00 USD
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$ 2,865.00 USD
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For the professional-level racer or the extreme enthusiast, the BC Racing ZR Series addresses the unique geometric and thermal requirements of the E46 M3 platform. By utilizing inverted front struts with a massive 42mm piston shaft, the ZR Series provides extreme structural rigidity, preventing geometry deflection under heavy braking and cornering loads. The 3-way adjustment allows the driver to "dial in" the car for specific obstacles; for instance, softening high-speed compression to soak up aggressive curbing while keeping low-speed compression firm for immediate turn-in response. Combined with standard pillowball top mounts, this system eliminates the "mushy" feel of factory rubber, providing direct, unmediated feedback to the driver. Key Features: Reduced Damper Fade: Remote external canisters move fluid away from hot brake components to ensure consistent lap times. Camber Adjustable Top Mounts: High-quality aluminum plates allow for aggressive track alignments to maximize the tire contact patch. Pillowball Rear Mounts: Replaces rubber bushings with solid spherical bearings for increased response and precision. Patented Concave Locking Ring: BC Racing’s unique design ensures lower mounts remain securely locked, even under extreme track vibration. Fully Rebuildable: Every component is individual and replaceable, making this a long-term investment in the car's competitive potential Specifications: Vehicle Fitment: 2000–2006 BMW M3 (E46) Convertible / Coupe. Spring Rates (Default): Front: 8 kg/mm | Rear: 12 kg/mm. Construction: TIG-welded steel and CNC-machined aluminum. Adjustment Range: 3-Way Independent (Rebound / Low-Speed Compression / High-Speed Compression). Warranty: 1-Year manufacturer’s warranty against defects.
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