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Audi A4 Engine Thermostat Parts

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Thermostat Replacement Kit

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 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2581867
Mfg#:
050121113CKT-3
Ships in 2 Business Days
ON SALE! SAVE 19%
$44.99

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

$36.63 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat O-Ring

ES#2834711 - 06B121119B - Thermostat O-Ring - Ensure a proper seal when installing your new thermostat. 50x3.5mm - Meistersatz - Audi Volkswagen

Ensure a proper seal when installing your new thermostat. 50x3.5mm

Brand:
Meistersatz - Corporate Logo
ES#:
2834711
Mfg#:
06B121119B
In Stock at Vendor
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Assembly - 92C

ES#3149393 - 06C121111E - Thermostat Assembly - 92C - Housing included - Rein - Audi

Housing included 2X Entries For Our 25th Anniversary Sweepstakes!
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

Thermostat (87°C)

ES#3234734 - 050121113C - Thermostat (87C) - Prevent overheating and premature engine wear - Gates - Audi Volkswagen

Prevent overheating and premature engine wear

Brand:
Gates - Corporate Logo
ES#:
3234734
Mfg#:
050121113C
In Stock
Limited Qty Sale
$44.99

This product was last offered at the strikethrough price on
06-17-2026

$33.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose

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 2X Entries For Our 25th Anniversary Sweepstakes!
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

Thermostat hose

ES#280804 - 06E121445B - Thermostat hose - Connects the thermostat to the coolant flange - Genuine Volkswagen Audi - Audi

Connects the thermostat to the coolant flange

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280804
Mfg#:
06E121445B
Ships in 1-2 days
11% off MSRP

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

$17.99

This product was last offered at the strikethrough price on
07-25-2026

$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Replacement Kit

ES#2581870 - 050121113ckt-4 - 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 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
2581870
Mfg#:
050121113CKT-4
In Stock
ON SALE! SAVE 24%
$41.99

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

$31.82 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80°C

ES#2771162 - 075121113D - Thermostat - 80C - Includes sealing O-Ring - Meyle - Audi Volkswagen

Includes sealing O-Ring 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Lower temperature thermostat, stock is 87°C

Brand:
Meyle - Corporate Logo
ES#:
2771162
Mfg#:
075121113D
Ships on Dec 3, 2026
$13.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87C

ES#1500 - 078121113F - Thermostat - 87C - Includes sealing O-Ring - Wahler - Audi Volkswagen

Includes sealing O-Ring Up to VIN 8D-X-315000, split is in the 1999 model year

Brand:
Wahler - Corporate Logo
ES#:
1500
Mfg#:
078121113F
Ships on Aug 18, 2026
$27.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat

ES#3430607 - 06H121113B - Thermostat - Keep your cooling system efficient - Vernet - Audi Volkswagen

Keep your cooling system efficient For vehicles up to production date 6/3/2012

Brand:
Vernet - Corporate Logo
ES#:
3430607
Mfg#:
06H121113B
Back Ordered
$26.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat (87°C)

ES#3149450 - 050121113C - Thermostat (87C) - Prevent overheating and premature engine wear - Wahler - Audi Volkswagen

Prevent overheating and premature engine wear

Brand:
Wahler - Corporate Logo
ES#:
3149450
Mfg#:
050121113C
Ships on Aug 18, 2026
$25.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat

ES#2710668 - 06H121113B - Thermostat - Keep your cooling system efficient - Vemo - Audi Volkswagen

Keep your cooling system efficient For vehicles up to production date 6/3/2012

Brand:
Vemo - Corporate Logo
ES#:
2710668
Mfg#:
06H121113B
In Stock
ON SALE! SAVE 54%
$54.99

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

$25.47 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 92�C

ES#5270 - 078121113G - Thermostat - 92C - Includes sealing O-Ring - Mahle-Behr - Audi Volkswagen

Includes sealing O-Ring From VIN 8D-X-315001, split is in the 1999 model year

Brand:
Mahle-Behr - Corporate Logo
ES#:
5270
Mfg#:
078121113G
In Stock at Vendor
$22.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80°C

ES#3149471 - 075121113D - Thermostat - 80C - Does not include sealing O-Ring - Wahler - Audi Volkswagen

Does not include sealing O-Ring Lower temperature thermostat, stock is 87°C

Brand:
Wahler - Corporate Logo
ES#:
3149471
Mfg#:
075121113D
Ships on Aug 18, 2026
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Air Conditioning O-Ring - Priced Each

ES#2554927 - 4D0260749B - Air Conditioning O-Ring - Priced Each - 7.6x2.5 - Genuine Volkswagen Audi - Audi

7.6x2.5

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2554927
Mfg#:
4D0260749B
Ships in 2 Business Days
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#2871116 - 3B0121321 - Expansion Tank Cap - Keep proper pressure in your coolant system - Febi - Audi

Keep proper pressure in your coolant system 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
For use with late model expansion tank, requires minor modification of coolant system to work

Brand:
Febi - Corporate Logo
ES#:
2871116
Mfg#:
3B0121321
In Stock at Vendor
$10.04 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.

Let us help you find the parts that fit your Audi

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