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BMW Coolant Expansion Tanks

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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N52 ECS Cooling System Refresh Kit - E8x E9x
N52 ECS Cooling System Refresh Kit - E8x E9x
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:59440849
Part#: TWTRPMPPIEBRPRKT
In Stock
New Item
$ 665.99 USD
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$ 665.99 USD
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Be sure your cooling system is up to the task
Automatic Transmission Thermostat Kit
Automatic Transmission Thermostat Kit
10X Entries Into Our F80 M3 Sweepstakes
Packaged by Turner - Corporate Logo
T#:57122955
Part#: 17111438819KT2
Back Ordered
New Item
Sale - Save 2% $ 93.99

This product was last offered at the strikethrough price on
10-19-2026

$ 91.86 USD
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Sale - Save 2%
$ 93.99

This product was last offered at the strikethrough price on
10-19-2026

$ 91.86 USD
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Keeping your E53 X5 automatic transmission cool is essential for longevity and peak performance. The factory transmission thermostat circuit relies on plastic housings and o-ring seals that deteriorate over time. When the transmission thermostat fails or it's mounting assembly cracks, coolant loss follows putting your transmission at risk of overheating under load.
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Coolant Expansion Tank - With Cap
Coolant Expansion Tank - With Cap
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:55497428
Part#: 17137640514
Ships on Nov 10, 2026
New Item
Sale - Save 10% $ 69.99

This product was last offered at the strikethrough price on
10-08-2026

$ 62.99 USD
Free Shipping on orders $49 and up
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Sale - Save 10%
$ 69.99

This product was last offered at the strikethrough price on
10-08-2026

$ 62.99 USD
Free Shipping on orders $49 and up
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E30 Coolant Expansion Tank
E30 Coolant Expansion Tank
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:57507437
Part#: 17111712641
Ships on Jan 11, 2027
New Item
Sale - Save 6% $ 49.99

This product was last offered at the strikethrough price on
10-21-2026

$ 46.99 USD
Free Shipping on orders $49 and up
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Sale - Save 6%
$ 49.99

This product was last offered at the strikethrough price on
10-21-2026

$ 46.99 USD
Free Shipping on orders $49 and up
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Coolant Expansion Tank
Coolant Expansion Tank
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:53044121
Part#: 17137601948
In Stock
New Item
Sale - Save 8% $ 72.99

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

$ 67.49 USD
Free Shipping on orders $49 and up
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Sale - Save 8%
$ 72.99

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

$ 67.49 USD
Free Shipping on orders $49 and up
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Coolant Expansion Tank Cap
Coolant Expansion Tank Cap
Febi - Corporate Logo
T#:56001934
Part#: 46221
Special Order: No Guaranteed ETA
New Item
$ 19.99 USD
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$ 19.99 USD
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This Febi Bilstein coolant expansion tank cap is designed to maintain the exact 1.4 bar pressure required to maximize your coolant's boiling point.
Coolant Expansion Tank
Coolant Expansion Tank
Febi - Corporate Logo
T#:56544005
Part#: 17139846642
Special Order: No Guaranteed ETA
New Item
$ 83.99 USD
Free Shipping on orders $49 and up
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$ 83.99 USD
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Protect your modern BMW from catastrophic thermal overload with the Febi Bilstein coolant expansion tank.
Coolant Expansion Tank
Coolant Expansion Tank
Febi - Corporate Logo
T#:56507814
Part#: 17137642160
Special Order: No Guaranteed ETA
New Item
$ 62.99 USD
Free Shipping on orders $49 and up
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$ 62.99 USD
Free Shipping on orders $49 and up
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This Febi Bilstein coolant expansion tank offers OEM quality, engineered to withstand aggressive driving, high thermal loads, and pressurized environments.
Coolant Expansion Tank
Coolant Expansion Tank
Febi - Corporate Logo
T#:56544003
Part#: 17138677649
Special Order: No Guaranteed ETA
New Item
$ 82.99 USD
Free Shipping on orders $49 and up
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$ 82.99 USD
Free Shipping on orders $49 and up
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Prevent catastrophic track-day or daily-driving overheating with this OEM-spec replacement Coolant Expansion Tank by Febi Bilstein.
Coolant Expansion Tank
Coolant Expansion Tank
Febi - Corporate Logo
T#:56544004
Part#: 17135A6A030
Special Order: No Guaranteed ETA
New Item
$ 82.99 USD
Free Shipping on orders $49 and up
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$ 82.99 USD
Free Shipping on orders $49 and up
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This Febi Bilstein coolant expansion tank delivers the strength and exact fitment needed to keep your BMW's cooling system locked down.

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