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Audi A4 Engine Thermostat Parts

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ES#3149419 - 06D121111G - Thermostat Assembly - (NO LONGER AVAILABLE) - Keep your cooling system operating properly - Rein - Audi

Keep your cooling system operating properly affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3149419
Mfg#:
06D121111G
Ships in 3 Business Days
$53.99 USD
Free Shipping
on orders $49 and up
ES#2608020 - 06H121113BKT4 - Thermostat Replacement Kit - Keep your cooling system efficient with a new thermostat, housing and o-ring - Assembled By ECS - Audi

Keep your cooling system efficient with a new thermostat, housing and o-ring affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with Inzi water pumps up to production date 6/3/2012

Brand:
Assembled By ECS - Corporate Logo
ES#:
2608020
Mfg#:
06H121113BKT4
Ships in 3 Business Days
ON SALE! SAVE 19%
$30.99

This product was last offered at the strikethrough price on
01-03-2026

$25.19 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2586266 - 06D121111G - Thermostat Assembly - Includes sealing o-ring - Vemo - Audi

Includes sealing o-ring affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Vemo - Corporate Logo
ES#:
2586266
Mfg#:
06D121111G
Special Order: No Guaranteed ETA
$86.99

This product was last offered at the strikethrough price on
04-15-2026

$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3961 - 06C121111C - Thermostat Assembly - Housing included - Wahler - Audi

Housing included affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Wahler - Corporate Logo
ES#:
3961
Mfg#:
06C121111C
In Stock
$47.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3430609 - 06H121113B - Thermostat - Keep your cooling system efficient - Behr - Audi Volkswagen

Keep your cooling system efficient affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles up to production date 6/3/2012

Brand:
Behr - Corporate Logo
ES#:
3430609
Mfg#:
06H121113B
Ships on Jun 23, 2026
$47.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2813087 - 06H121026BA - Water Pump - Includes water pump and seal. - Hamburg Tech - Audi Volkswagen

Includes water pump and seal. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813087
Mfg#:
06H121026BA
Ships in 1 Business Day
$45.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3234734 - 050121113C - Thermostat (87C) - Prevent overheating and premature engine wear - Gates - Audi Volkswagen

Prevent overheating and premature engine wear affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Gates - Corporate Logo
ES#:
3234734
Mfg#:
050121113C
In Stock
$44.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2762251 - 06C121111EKT1 - Thermostat Replacement Kit - Maintain proper operating temperature with a new thermostat, housing and hardware - Assembled By ECS - Audi

Maintain proper operating temperature with a new thermostat, housing and hardware affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2762251
Mfg#:
06C121111EKT1
Ships in 2 Business Days
ON SALE! SAVE 24%
$57.99

This product was last offered at the strikethrough price on
05-02-2026

$44.12 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3449329 - N90136802 - Thermostat O-Ring - Ensure a proper seal when installing your new thermostat - Victor Reinz - Audi BMW Volkswagen

Ensure a proper seal when installing your new thermostat affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Victor Reinz - Corporate Logo
ES#:
3449329
Mfg#:
N90136802
In Stock
$3.99

This product was last offered at the strikethrough price on
03-15-2026

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Includes sealing O-Ring affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
From VIN 8D-X-315001, split is in the 1999 model year

Brand:
Gates - Corporate Logo
ES#:
3234892
Mfg#:
078121113G
Ships on Jun 25, 2026
$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2803241 - 06E121445B - Thermostat Hose - Connects the thermostat to the coolant flange - Rein - Audi

Connects the thermostat to the coolant flange affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2803241
Mfg#:
06E121445B
In Stock
$9.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3234733 - 050121113B - Thermostat (80C)  - Prevent overheating and premature engine wear with a lower opening temperature - Gates - Audi

Prevent overheating and premature engine wear with a lower opening temperature affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Gates - Corporate Logo
ES#:
3234733
Mfg#:
050121113B
Ships on Jun 25, 2026
$38.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#272857 - 030121121B - Thermostat Housing - Located on the water pump assembly - Genuine Volkswagen Audi - Audi Volkswagen

Located on the water pump assembly affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
272857
Mfg#:
030121121B
Ships in 2 Business Days
10% off MSRP

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$40.99

This product was last offered at the strikethrough price on
06-06-2026

$36.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2581867 - 050121113ckt-3 -  Thermostat Replacement Kit - Maintain proper operating temperature with a new thermostat, housing and hardware - Assembled By ECS - Audi

Maintain proper operating temperature with a new thermostat, housing and hardware affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2581867
Mfg#:
050121113CKT-3
In Stock
ON SALE! SAVE 20%
$45.99

This product was last offered at the strikethrough price on
01-03-2026

$36.63 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3149393 - 06C121111E - Thermostat Assembly - 92C  - Housing included - Rein - Audi

Housing included affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3149393
Mfg#:
06C121111E
Ships in 3 Business Days
$34.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2803054 - 06F121057D - Coolant Hose - Rubber coolant hose that connects thermostat to coolant hard pipe - Rein - Audi

Rubber coolant hose that connects thermostat to coolant hard pipe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2803054
Mfg#:
06F121057D
Ships in 1 Business Day
$4.07 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible 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.

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Manufacturer names and/or part numbers are used only for identification purposes.

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