Install new hardware with your new parts. M7x21.5mm
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! We Price Match - Give Us A Call or Chat!
Brand:
ES#:
4151982
Mfg#:
N90945002
In Stock
ON SALE!
SAVE 19%
$5.99
This product was last offered at the strikethrough price on 06-29-2026
Install new hardware with your new parts. M7x21.5mm
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms Secures thermostat housing to the block, 2 required.
Brand:
ES#:
6661
Mfg#:
N90945002
In Stock
Limited Qty Sale
29% off MSRP
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
$8.49
This product was last offered at the strikethrough price on 03-18-2026
Bring your car to operating temperature.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Brand:
ES#:
6391
Mfg#:
044121113
In Stock
$24.87
This product was last offered at the strikethrough price on 01-23-2026
Bring your car to operating temperature.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
5335359
Mfg#:
044121113
Ships in 1 Business Day
ON SALE!
SAVE 24%
$14.99
This product was last offered at the strikethrough price on 05-02-2026
Includes thermostat with housing, o-ring and mounting hardware
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
2966379
Mfg#:
B5PSSTDITSTATKT1
Ships in 1-2 days
ON SALE!
SAVE 25%
$33.99
This product was last offered at the strikethrough price on 05-02-2026
Keep your car running at the proper temperature.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! We Price Match - Give Us A Call or Chat!
Keep your car running at the proper temperature. Includes o-ring
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! We Price Match - Give Us A Call or Chat!
Brand:
ES#:
3149395
Mfg#:
044121113
Back Ordered
ON SALE!
$11.99
This product was last offered at the strikethrough price on 06-29-2026
Keep your car running at the proper temperature. Does not include o-ring
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms We Price Match - Give Us A Call or Chat!
Includes thermostat with housing, o-ring and mounting hardware
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Brand:
ES#:
2966380
Mfg#:
B5PSSTDITSTATKT2
Ships in 1-2 days
ON SALE!
SAVE 25%
$28.99
This product was last offered at the strikethrough price on 05-02-2026
Bring your car to operating temperature.
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes! We Price Match - Give Us A Call or Chat!
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Brand:
ES#:
2800859
Mfg#:
44121113
Back Ordered
$19.99 USD
Free Shipping
on orders $49 and up
Lifetime Replacement
More About Engine Thermostat Parts
Your thermostat helps regulate engine temperatures by allowing the coolant to circulate through the radiator once it opens. If it fails, this might mean it never closes, but worst case, it could mean your coolant doesn't get to the radiator. Stay ahead of cooling issues by replacing your thermostat regularly with an OEM thermostat or quality aftermarket thermostat from our selection.
Lifetime Replacement
