BMW Coolant Expansion Tanks for MINI

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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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Coolant Expansion Tank
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:30728965
Part#: 17137823626
In Stock
Sale - Save 20% $ 47.99

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

$ 38.34 USD
Free Shipping on orders $49 and up
Sale - Save 20%
$ 47.99

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

$ 38.34 USD
Free Shipping on orders $49 and up
Coolant Expansion Tank W/ Cap
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:639188
Part#: 17137529273
In Stock
Sale - Save 16% $ 38.99

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

$ 32.94 USD
Free Shipping on orders $49 and up
Sale - Save 16%
$ 38.99

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

$ 32.94 USD
Free Shipping on orders $49 and up
Genuine MINI Engine Coolant Expansion Tank Cap - 17135A1BD89 ...
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Genuine MINI - Corporate Logo
T#:28337931
Part#: 17135A1BD89
Ships in 3 Business Days
26% off MSRP $ 34.99

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

$ 25.99 USD
Free Shipping on orders $49 and up
26% off MSRP
$ 34.99

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

$ 25.99 USD
Free Shipping on orders $49 and up

Bremmen Coolant Bleeder Screw - BMW E30 E36 E38 E39 E46 E83 E90 Z4 ...
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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
Free Shipping on orders $49 and up
Sale - Save 39%
$ 3.99

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

$ 2.44 USD
Free Shipping on orders $49 and up
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.

Forge Motorsport MINI Cooper S Alloy Header Tank FMMINHT-C ...
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Forge - Corporate Logo
T#:19428690
Part#: FMMINHT
Ships in 4 Business Days
$ 278.99 USD
Free Shipping on orders $49 and up

Upgrade your MINI Cooper S with the Forge Motorsport Alloy Header Tank FMMINHT-C. Crafted from high-quality alloy, this coolant tank not only enhances the appearance of your engine bay but also provides lasting durability. Say goodbye to the yellowing of your factory unit due to age. Enjoy the following benefits:

  • High-quality alloy construction ensures longevity.
  • Enhances the appearance of your engine bay.
  • Compatible with the factory pressure cap for easy installation.
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Genuine MINI Coolant Expansion Tank
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine MINI - Corporate Logo
T#:393093
Part#: 17137823626
Ships in 3 Business Days
8% off MSRP $ 129.99

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

$ 119.99 USD
Free Shipping
8% off MSRP
$ 129.99

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

$ 119.99 USD
Free Shipping

MINI F5X F6X Expansion Tank
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:28138156
Part#: 17137617362
Special Order: No Guaranteed ETA
Sale - Save 5% $ 81.99

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

$ 77.51 USD
Free Shipping on orders $49 and up
Sale - Save 5%
$ 81.99

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

$ 77.51 USD
Free Shipping on orders $49 and up

MINI F5X F6X Expansion Tank

For Mini owners looking to maintain optimal engine performance, the MINI F5X F6X Expansion Tank is an essential component. This expansion tank ensures proper cooling system functionality, preventing overheating and potential engine damage. Crafted with high-quality materials, it guarantees durability and reliability for long-term use, providing peace of mind to Mini enthusiasts.

  • Ensures proper cooling system functionality
  • Prevents overheating and potential engine damage
  • Crafted with high-quality materials for durability
  • Provides peace of mind to Mini enthusiasts
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