BMW Coolant Expansion Tanks for BMW 3 Series E30 (1984-1991)

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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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Genuine BMW Radiator Cap 1,4Bar - 17112227683 - E30,E30 M3, E28 M5
Genuine BMW Radiator Cap 1,4Bar - 17112227683 - E30,E30 M3, E28 M5 ...
Genuine BMW - Corporate Logo
T#:22513
Part#: 17112227683
In Stock
Sale - Save 9% $ 26.99

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

$ 24.57 USD
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Sale - Save 9%
$ 26.99

This product was last offered at the strikethrough price on
08-26-2026

$ 24.57 USD
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Genuine BMW Radiator Cap - 1,4Bar
This item fits the following BMW Chassis:
E30 M3,E30

Fits BMW Engines including:
S14,S38

Genuine BMW Expansion Tank Cap
Genuine BMW Expansion Tank Cap
For vehicles with production date from 09/1987
Genuine BMW - Corporate Logo
T#:384985
Part#: 17137639023
Ships in 4 Business Days
$ 21.99 USD
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$ 21.99 USD
Free Shipping on orders $49 and up
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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 6 Business 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
Free Shipping on orders $49 and up
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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 Expansion Tank Cap
Genuine BMW Expansion Tank Cap
For vehicles with production date up to 09/1987
Genuine BMW - Corporate Logo
T#:367910
Part#: 17114379047
Ships in 4 Business Days
4% off MSRP $ 47.99

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

$ 45.99 USD
Free Shipping on orders $49 and up
Add to Wish List
4% off MSRP
$ 47.99

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

$ 45.99 USD
Free Shipping on orders $49 and up
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Genuine BMW Coolant Level Sensor
Genuine BMW Coolant Level Sensor
Genuine BMW - Corporate Logo
T#:368499
Part#: 61311378320
Ships in 4 Business Days
2% off MSRP $ 92.99

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

$ 90.99 USD
Free Shipping on orders $49 and up
Add to Wish List
2% off MSRP
$ 92.99

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

$ 90.99 USD
Free Shipping on orders $49 and up
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Coolant Level Sensor
Coolant Level Sensor
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:30728984
Part#: 61311378320
In Stock
Sale - Save 56% $ 34.99

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

$ 15.29 USD
Free Shipping on orders $49 and up
Add to Wish List
Sale - Save 56%
$ 34.99

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

$ 15.29 USD
Free Shipping on orders $49 and up
Add to Wish List
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 ...
10X Entries Into Our F80 M3 Sweepstakes
Bremmen Parts - Corporate Logo
T#:640140
Part#: 17111712788
Ships in 9 Business Days
$ 3.99 USD
Free Shipping on orders $49 and up
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$ 3.99 USD
Free Shipping on orders $49 and up
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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.

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