Keep proper pressure on your coolant, replaces any modern blue or black cooling cap
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4691207
Mfg#:
420121321
In Stock
ON SALE!
SAVE 14%
$34.99
This product was last offered at the strikethrough price on 05-02-2026
Keep proper pressure on your coolant, replaces any modern blue or black cooling cap
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
2149010
Mfg#:
420121321
Ships in 2 Business Days
9% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$326.99
This product was last offered at the strikethrough price on 02-26-2026
Keep proper pressure in your coolant system
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4858532
Mfg#:
2Q0121321A
In Stock
ON SALE!
SAVE 22%
$19.99
This product was last offered at the strikethrough price on 05-02-2026
Keep proper pressure in your coolant system
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Brand:
ES#:
3690266
Mfg#:
5Q0121321
Ships on Sep 29, 2026
$18.99
This product was last offered at the strikethrough price on 04-02-2026
Keep proper pressure in your coolant system
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Install new hardware with your new parts.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
See your coolant levels clearly again, comes with coolant level sensor, does not include cap
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
3668526
Mfg#:
4M0121403H
Ships in 1 day
9% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$148.99
This product was last offered at the strikethrough price on 02-26-2026
Replace your cracked or dried out components - Used in the lower portion of the expansion tank
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Keep proper pressure in your coolant system
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
4818658
Mfg#:
5Q0121321
In Stock
ON SALE!
SAVE 24%
$15.99
This product was last offered at the strikethrough price on 05-02-2026
Keep proper pressure in your coolant system
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Keep proper pressure in your coolant system
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
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
