BMW Coolant Expansion Tanks for BMW Z3 (1996-2002)

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On certain models, namely E36, E46, and E90, the factory BMW expansion tank is prone to either breaking at connection points or blowing apart altogether. If you're starting to feel like your expansion tank is on borrowed time, it's probably time to replace with either a direct OE replacement, or strengthen your cooling setup with an aluminum expansion tank - we offer numerous performance upgrades for your expansion tank. Especially if you're someone who likes to track your BMW, we recommend upgrading your expansion tank to avoid ruining your track day.
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Genuine BMW Expansion Tank Cap - E3X / E53 / Z4
Genuine BMW Expansion Tank Cap - E3X / E53 / Z4
Genuine BMW - Corporate Logo
T#:207187
Part#: 17117639022
In Stock
21% off MSRP $ 34.96

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

$ 27.67 USD
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21% off MSRP
$ 34.96

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

$ 27.67 USD
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Genuine BMW Radiator Cap - 2,0Bar
This item fits the following BMW Chassis:
E36 M3,E39 M5,E46 M3,E85 Z4M,E53 48IS,E36,E38,E39,E46,E53 X5,E65,E83 X3,E85 Z4,E86 Z4,F06,F10,F12,F13

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Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4
Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...
Bremmen Parts - Corporate Logo
T#:640140
Part#: 17111712788
In Stock
Sale - Save 39% $ 3.99

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

$ 2.44 USD
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Sale - Save 39%
$ 3.99

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

$ 2.44 USD
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Plastic bleeder screw for cooling system is used to bleed air that would otherwise create an air pocket and lead to overheating. Includes o-ring seal.
Genuine BMW Coolant Expansion Tank - M50 M52 S50 S52
Genuine BMW Coolant Expansion Tank - M50 M52 S50 S52
For vehicles with production date up to 09/1998
Genuine BMW - Corporate Logo
T#:360745
Part#: 17111723520
Ships in 1-2 days
5% off MSRP $ 215.99

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

$ 205.99 USD
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5% off MSRP
$ 215.99

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

$ 205.99 USD
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Genuine BMW Cap - 17121719356 - E30,E46,E46 M3
Genuine BMW Cap - 17121719356 - E30,E46,E46 M3
Genuine BMW - Corporate Logo
T#:46115
Part#: 17121719356
Ships in 1-2 days
3% off MSRP $ 31.99

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

$ 30.99 USD
Free Shipping on orders $49 and up
Add to Wish List
3% off MSRP
$ 31.99

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

$ 30.99 USD
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Genuine BMW Cap
This item fits the following BMW Chassis:
E46 M3,E30,E46

Fits BMW Engines including:
M20,S54,S62

Genuine BMW Coolant Expansion Tank
Genuine BMW Coolant Expansion Tank
Genuine BMW - Corporate Logo
T#:360743
Part#: 17111712835
Ships in 1-2 days
5% off MSRP $ 141.99

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

$ 134.99 USD
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5% off MSRP
$ 141.99

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

$ 134.99 USD
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Genuine BMW - Level 1 Expansion Tank Replacement Kit - E36, Z3
Genuine BMW - Level 1 Expansion Tank Replacement Kit - E36, Z3 ...
Genuine BMW - Corporate Logo
T#:374427
Part#: 17111723520KT2
Ships in 1-2 days
$ 400.99

This product was last offered at the strikethrough price on
08-12-2026

$ 395.99 USD
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$ 395.99 USD
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Genuine BMW Expansion Tank - Z3 M Coupe/Roadster S54
Genuine BMW Expansion Tank - Z3 M Coupe/Roadster S54
Genuine BMW - Corporate Logo
T#:20714
Part#: 17102229772
Ships in 1-2 days
5% off MSRP $ 215.99

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

$ 205.99 USD
Free Shipping
Add to Wish List
5% off MSRP
$ 215.99

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

$ 205.99 USD
Free Shipping
Add to Wish List

Replace your damaged expansion tank to prevent coolant loss or potential overheating issues.


This item fits the following BMWs:
BMW M Series - Z3 M Coupe, M Roadster

Fits BMW Engines including:
S54

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Bav Auto Coolant Expansion Tank - E53 X5, Z3 2.3 2.5i 2.8 3.0i
Bav Auto Coolant Expansion Tank - E53 X5, Z3 2.3 2.5i 2.8 3.0i ...
Bremmen Parts - Corporate Logo
T#:640497
Part#: 17107514964
In Stock
Sale - Save 16% $ 63.99

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

$ 53.75 USD
Free Shipping on orders $49 and up
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Sale - Save 16%
$ 63.99

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

$ 53.75 USD
Free Shipping on orders $49 and up
Add to Wish List
This radiator expansion tank is used on E53 X5 4.4i and 4.6is with M62 engine, and Z3 2.3 2.5i 2.8 3.0i from 1999-2002. It is a common failure item as the plastic weakens over time and stress cracks will lead to coolant leaks. We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.
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