Prevent pressure loss and overheating with a new expansion tank cap
10X 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
Brand:
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
The last expansion tank you'll ever need! Upgrade to durable aluminum construction and leave failure-prone plastic behind.
10X 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 For Vehicles with a Production Date from 09/1987
Replace your cracked or faded expansion tank.
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! For vehicles with production date up to 09/1987
Replace your cracked or faded expansion tank.
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 For vehicles with production date from 09/1987
Brand:
ES#:
3464804
Mfg#:
17111712641
In Stock
$56.99
This product was last offered at the strikethrough price on 08-14-2026
Replace your cracked or faded expansion tank.
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 For vehicles with production date from 09/1987
Brand:
ES#:
37828
Mfg#:
17111712641
Ships in 1-2 days
2% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$164.99
This product was last offered at the strikethrough price on 10-25-2026
Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.
10X 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
Brand:
ES#:
4772597
Mfg#:
61132359999
In Stock
ON SALE!
SAVE 25%
$10.99
This product was last offered at the strikethrough price on 06-13-2026
Replace your cracked or faded expansion tank.
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! For vehicles with production date from 09/1987
Located on the top of the coolant expansion tank
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
Brand:
ES#:
166579
Mfg#:
61311378320
Ships in 1-2 days
2% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$92.99
This product was last offered at the strikethrough price on 10-25-2026
Located on the top of the coolant expansion tank
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#:
2695771
Mfg#:
61311378320
In Stock
$26.17
This product was last offered at the strikethrough price on 07-09-2026
Allows coolant overflow to escape from the expansion tank
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
Brand:
ES#:
130509
Mfg#:
51731911369
In Stock
2% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$45.99
This product was last offered at the strikethrough price on 10-25-2026
Located on the top of the coolant expansion tank
10X 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
Brand:
ES#:
4818660
Mfg#:
61311378320
In Stock
ON SALE!
SAVE 56%
$34.99
This product was last offered at the strikethrough price on 05-02-2026
Replace your cracked or faded expansion tank.
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 For vehicles with production date up to 09/1987
Brand:
ES#:
37766
Mfg#:
17111707540
Ships in 1-2 days
2% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$164.99
This product was last offered at the strikethrough price on 10-25-2026
1.4 Bar pressure
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 For vehicles with production date from 09/1987
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
