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BMW E30 Coolant Expansion Tank Caps

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Expansion Tank Cap

ES#4304653 - 17117639022 - Expansion Tank Cap - Prevent pressure loss and overheating with a new expansion tank cap - Bavarian Autosport - BMW
ECS Tuning recommends this product.

Prevent pressure loss and overheating with a new expansion tank cap 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bavarian Autosport - Corporate Logo
ES#:
4304653
Mfg#:
17117639022
In Stock
ON SALE! SAVE 15%
$13.99

This product was last offered at the strikethrough price on
06-03-2026

$11.89 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2777575 - 17117639022 - Expansion Tank Cap - Replace worn or missing pieces. - Genuine BMW - BMW

Replace worn or missing pieces.

Brand:
Genuine BMW - Corporate Logo
ES#:
2777575
Mfg#:
17117639022
In Stock
21% off MSRP

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

$34.96

This product was last offered at the strikethrough price on
09-04-2026

$27.67 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#3023872 - 17111742231 - Expansion Tank Cap - Replace when performing cooling service. - Mahle-Behr - BMW

Replace when performing cooling service.

Brand:
Mahle-Behr - Corporate Logo
ES#:
3023872
Mfg#:
17111742231
Ships in 3 Business Days
$20.99

This product was last offered at the strikethrough price on
08-13-2026

$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#3015898 - 17137639023 - Expansion Tank Cap - 1.4 Bar pressure - Genuine BMW - BMW

1.4 Bar pressure For vehicles with production date from 09/1987

Brand:
Genuine BMW - Corporate Logo
ES#:
3015898
Mfg#:
17137639023
In Stock
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#3672879 - 17117639022 - Expansion Tank Cap - Replace worn or missing pieces. - Meyle - BMW

Replace worn or missing pieces. 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
3672879
Mfg#:
17117639022
In Stock
ON SALE! SAVE 40%
$14.99

This product was last offered at the strikethrough price on
05-14-2026

$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#205244 - 17111742231 - Expansion Tank Cap - Replace when performing cooling service. - Rein - BMW
ECS Tuning recommends this product.

Replace when performing cooling service. 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
205244
Mfg#:
17111742231
Ships in 1 Business Day
ON SALE!
$17.99

This product was last offered at the strikethrough price on
08-31-2026

$17.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2874167 - 17111742232 - Expansion Tank Cap - 1.4 Bar pressure - Febi - BMW

1.4 Bar pressure We Price Match - Give Us A Call or Chat!
For vehicles with production date from 09/1987

Brand:
Febi - Corporate Logo
ES#:
2874167
Mfg#:
17111742232
In Stock
$24.99

This product was last offered at the strikethrough price on
06-18-2026

$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#261723 - 17111742232 - Expansion Tank Cap - 1.4 Bar pressure - Mahle-Behr - BMW

1.4 Bar pressure For vehicles with production date from 09/1987

Brand:
Mahle-Behr - Corporate Logo
ES#:
261723
Mfg#:
17111742232
Ships in 1 Business Day
$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2814085 - 17114379047 - Expansion Tank Cap - 1.2 Bar pressure - Hamburg Tech - BMW

1.2 Bar pressure We Price Match - Give Us A Call or Chat!
For vehicles with production date up to 09/1987

Brand:
Hamburg Tech - Corporate Logo
ES#:
2814085
Mfg#:
17114379047
In Stock
ON SALE!
$5.70

This product was last offered at the strikethrough price on
09-04-2026

$5.53 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Cap

ES#37974 - 17112227683 - Radiator Cap - Used to maintain proper pressure and boiling point of your cooling system - Genuine BMW - BMW

Used to maintain proper pressure and boiling point of your cooling system

Brand:
Genuine BMW - Corporate Logo
ES#:
37974
Mfg#:
17112227683
In Stock
ON SALE!
$26.99

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

$24.57 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2534586 - 17114379047 - Expansion Tank Cap - 1.2 Bar pressure - URO - BMW

1.2 Bar pressure 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
For vehicles with production date up to 09/1987

Brand:
URO - Corporate Logo
ES#:
2534586
Mfg#:
17114379047
Ships in 1 Business Day
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#38066 - 17114379047 - Expansion Tank Cap - 1.2 Bar pressure - Genuine BMW - BMW

1.2 Bar pressure For vehicles with production date up to 09/1987

Brand:
Genuine BMW - Corporate Logo
ES#:
38066
Mfg#:
17114379047
Ships in 1-2 days
4% off MSRP

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

$47.99

This product was last offered at the strikethrough price on
09-04-2026

$45.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2534584 - 17111468077 - Expansion Tank Cap - 1.4 Bar pressure - URO - BMW

1.4 Bar pressure 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2534584
Mfg#:
17111468077
In Stock
ON SALE! SAVE 19%
$6.99

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

$5.69 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2187552 - 17111742231 - Expansion Tank Cap - Replace when performing cooling service. - URO - BMW

Replace when performing cooling service. 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2187552
Mfg#:
17111742231
Ships in 1 Business Day
$11.99

This product was last offered at the strikethrough price on
08-13-2026

$8.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2814079 - 17111742231 - Expansion Tank Cap - Replace worn or missing pieces. - Hamburg Tech - BMW

Replace worn or missing pieces. We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2814079
Mfg#:
17111742231
Ships in 1 Business Day
$9.17 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#3493501 - 17137639023 - Expansion Tank Cap - 1.4 Bar pressure - Rein - BMW

1.4 Bar pressure 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!
For vehicles with production date from 09/1987

Brand:
Rein - Corporate Logo
ES#:
3493501
Mfg#:
17137639023
Ships in 3 Business Days
ON SALE!
$14.99

This product was last offered at the strikethrough price on
08-31-2026

$14.24 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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