Install new hardware with your new parts.
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Piece that the rubber grommet sits into on the bracket
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Install new hardware with your new parts. M6
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 Used in securing the coolant expansion tank
Brand:
ES#:
470213
Mfg#:
N90570802
In Stock
19% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$3.55
This product was last offered at the strikethrough price on 10-27-2026
Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank replacement kit.
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Brand:
ES#:
3660806
Mfg#:
8K0121405QKT
In Stock
ON SALE!
SAVE 15%
$83.99
This product was last offered at the strikethrough price on 05-02-2026
Coolant reservoir to cure hairline cracks, resolve false low-coolant warnings, and restore the structural integrity of your pressurized cooling system.
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Keep proper pressure in your coolant system
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Seals the expansion tank cap to the reservoir. 28.5x3.8
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Keep proper pressure on your coolant
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!
Keep proper pressure in your coolant system
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!
Keep proper pressure in your coolant system
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
Replace your thermostat, temp sensor, and expansion tank after performing a proper coolant system flush!
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Brand:
ES#:
4691027
Mfg#:
8W1121405NKT
Ships in 2 Business Days
$565.99
This product was last offered at the strikethrough price on 08-31-2026
Replace your thermostat, temp sensor, and expansion tank after performing a proper coolant system flush!
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#:
4691355
Mfg#:
8W1121405N1KT
Back Ordered
$434.99
This product was last offered at the strikethrough price on 08-31-2026
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
