BMW Cooling System Parts & Accessories for BMW G01 X3 xDrive30i B46 2.0L

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The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

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Water/Coolant Pump With Support
Water/Coolant Pump With Support
For models with the B48D, B46D, or B46X engines only and without the Energy Recovery Sy...
Bremmen Parts - Corporate Logo
T#:49648357
Part#: 11518650988
In Stock
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Sale - Save 17% $ 234.99

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

$ 195.99 USD
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Sale - Save 17%
$ 234.99

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

$ 195.99 USD
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Precision Raceworks Coolant Cap Bundle - Blue - Most BMWs from 2016 to 2023
Precision Raceworks Coolant Cap Bundle - Blue - Most BMWs from 2016 t...
For model years up to 2023
Must Swap Pressure Relief Valve From PN #17117639021 to New Unit. Other Pressure Relief Valves Will Not Apply
Precision Raceworks - Corporate Logo
T#:47679258
Part#: 622-0291-BLU
Ships in 9 Business Days
New Item
$ 184.99 USD
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$ 184.99 USD
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The Precision Raceworks Billet Coolant Cap Set is a functional and stunningly stylish way to add a nice touch to any engine bay! These caps come in three color options, so there is always a color that will work for you! Black with Billet Silver, Black with Blue, and the Stealth series (all black). Many people don't realize it, but the OEM caps have a pressure release valve built into them. Oftentimes, aftermarket companies don't know this either or just don't care. But our team cares about proper function just as much as we care about the appearance of every product we design. For pressure relief, our caps incorporate the OEM internals, so you get all the functionality of the original caps, ensuring a safe and reliable system in place. These caps offer superior style and performance-grade components that guarantee a reliable fit every time. Durable billet aluminum construction provides long-lasting protection and dependability that will upgrade your engine bay for years to come. PLEASE NOTE: These do require assembly and swapping the pressure relief valves from your old caps to your new billet caps.
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CSF Universal Large Single-Pass Oil Cooler - Universal Application
CSF Universal Large Single-Pass Oil Cooler - Universal Application ...
Universal fitment design - modifications may be necessary to run this cooler
CSF - Corporate Logo
T#:53608839
Part#: 8371
Ships in 3 Business Days
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$ 499.00 USD
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$ 499.00 USD
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CSF redesigned this cooler and went with a more traditional inlet/outlet orientation. The new single pass design features high efficiency and high durability, but with vertically oriented inlet and outlet connections.
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Saleri Water Pump With Support Bracket
Saleri Water Pump With Support Bracket
Saleri - Corporate Logo
T#:47439411
Part#: 11517644809
Ships in 1 day
New Item
$ 201.99

This product was last offered at the strikethrough price on
05-07-2026

$ 195.99 USD
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$ 195.99 USD
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Genuine BMW water pump housing coolant flange - G-Chassis - B48TU (B48D)
Genuine BMW water pump housing coolant flange - G-Chassis - B48TU (B4...
For B48TU Gen 2 applications (B46D/B48D)
Genuine BMW - Corporate Logo
T#:48780791
Part#: 11515A74E79
In Stock
New Item
2% off MSRP $ 133.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 130.99 USD
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2% off MSRP
$ 133.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 130.99 USD
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Genuine BMW replacement coolant flange for back of water pump housing
Precision Raceworks Coolant Cap Bundle - Black - Most BMWs from 2016 to 2023
Precision Raceworks Coolant Cap Bundle - Black - Most BMWs from 2016 ...
For model years up to 2023
Precision Raceworks - Corporate Logo
T#:47679257
Part#: 622-0291-BLAK
Ships in 9 Business Days
New Item
$ 184.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 184.99 USD
Free Shipping on orders $49 and up
Add to Wish List
The Precision Raceworks Billet Coolant Cap Set is a functional and stunningly stylish way to add a nice touch to any engine bay! These caps come in three color options, so there is always a color that will work for you! Black with Billet Silver, Black with Blue, and the Stealth series (all black). Many people don't realize it, but the OEM caps have a pressure release valve built into them. Oftentimes, aftermarket companies don't know this either or just don't care. But our team cares about proper function just as much as we care about the appearance of every product we design. For pressure relief, our caps incorporate the OEM internals, so you get all the functionality of the original caps, ensuring a safe and reliable system in place. These caps offer superior style and performance-grade components that guarantee a reliable fit every time. Durable billet aluminum construction provides long-lasting protection and dependability that will upgrade your engine bay for years to come. PLEASE NOTE: These do require assembly and swapping the pressure relief valves from your old caps to your new billet caps.
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Coolant Cap Bundle - Silver
Coolant Cap Bundle - Silver
For model years up to 2023
Precision Raceworks - Corporate Logo
T#:47679259
Part#: 622-0291-SIL
Ships in 9 Business Days
New Item
$ 184.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 184.99 USD
Free Shipping on orders $49 and up
Add to Wish List
The Precision Raceworks Billet Coolant Cap Set is a functional and stunningly stylish way to add a nice touch to any engine bay! These caps come in three color options, so there is always a color that will work for you! Black with Billet Silver, Black with Blue, and the Stealth series (all black). Many people don't realize it, but the OEM caps have a pressure release valve built into them. Oftentimes, aftermarket companies don't know this either or just don't care. But our team cares about proper function just as much as we care about the appearance of every product we design. For pressure relief, our caps incorporate the OEM internals, so you get all the functionality of the original caps, ensuring a safe and reliable system in place. These caps offer superior style and performance-grade components that guarantee a reliable fit every time. Durable billet aluminum construction provides long-lasting protection and dependability that will upgrade your engine bay for years to come. PLEASE NOTE: These do require assembly and swapping the pressure relief valves from your old caps to your new billet caps.
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Meyle Coolant Expansion Tank - BMW G0X X3 X4, F9X X3M X4M
Meyle Coolant Expansion Tank - BMW G0X X3 X4, F9X X3M X4M
Meyle - Corporate Logo
T#:50066859
Part#: 17135A6A030
In Stock
New Item
$ 75.99 USD
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$ 75.99 USD
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Replaces cracked or aged coolant expansion tank.
VEMO Coolant Thermostat Assembly - BMW G20 G22/23 G30 B48 2.0L
VEMO Coolant Thermostat Assembly - BMW G20 G22/23 G30 B48 2.0L ...
Vemo - Corporate Logo
T#:49578587
Part#: V20-99-1310
Special Order: No Guaranteed ETA
New Item
$ 182.99 USD
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$ 182.99 USD
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Modern BMW thermostats are electronically controlled, allowing the DME/ECU to directly regulate coolant flow throughout the engine and its components. This system enables the thermostat to operate based on a broader range of temperature inputs, such as coolant, cylinder head, engine block, and oil temperatures, for more refined control of engine warm-up and temperature across diverse conditions. Unlike traditional thermostats, which simply open or close to permit coolant flow, this system uses a rotary valve for more dynamic control. The rotary valve adjusts to various positions, allowing for partial or full coolant flow to designated passageways as needed. This precision control helps your BMW's engine reach optimal temperatures quickly and ensures efficient heat management under various driving conditions.
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