Prevent pressure loss and overheating with a new expansion tank cap
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Brand:
ES#:
4304653
Mfg#:
17117639022
In Stock
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$13.99
This product was last offered at the strikethrough price on 06-03-2026
Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.
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Brand:
ES#:
4772597
Mfg#:
61132359999
In Stock
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$10.99
This product was last offered at the strikethrough price on 06-13-2026
Keep your car cool and prepared for hot conditions and end "spontaneous combustion" of plastic expansion tanks.
Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply Direct fitment with the Mishimoto fan shroud. Modification may be required with the OEM shroud.
Does not include cap or coolant level sensor
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Brand:
ES#:
37839
Mfg#:
17111712835
Ships in 1-2 days
5% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$141.99
This product was last offered at the strikethrough price on 10-27-2026
1.4 Bar pressure
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Brand:
ES#:
2874167
Mfg#:
17111742232
Ships in 2 Business Days
$25.99
This product was last offered at the strikethrough price on 10-10-2026
Replace worn or missing pieces.
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Brand:
ES#:
3672879
Mfg#:
17117639022
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$14.99
This product was last offered at the strikethrough price on 05-14-2026
Replace when performing cooling service.
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Brand:
ES#:
205244
Mfg#:
17111742231
In Stock
$17.99
This product was last offered at the strikethrough price on 10-22-2026
Does not include cap or coolant level sensor
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Seals the expansion tank to the base of the radiator
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Brand:
ES#:
38540
Mfg#:
17211712965
In Stock
17% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$5.99
This product was last offered at the strikethrough price on 05-22-2026
Does not include cap or coolant level sensor
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Brand:
ES#:
3148875
Mfg#:
17111712835
In Stock
$23.99
This product was last offered at the strikethrough price on 10-07-2026
14.5mm O-ring that seals cap to tank
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Replace when performing cooling service.
2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply We Price Match - Give Us A Call or Chat!
Brand:
ES#:
2187552
Mfg#:
17111742231
Ships in 2 Business Days
$11.99
This product was last offered at the strikethrough price on 08-13-2026
A common source of overheating problems is a broken or leaking coolant expansion tank. Replace it with an OEM coolant expansion tank or quality aftermarket expansion tank to prevent future woes.
Lifetime Replacement
