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Volkswagen Passat B4 TDI Engine Thermostat Parts

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Thermostat - 87°C

ES#6391 - 044121113 - Thermostat - 87C - Bring your car to operating temperature. - Vaico - Audi Volkswagen

Bring your car to operating temperature. We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
6391
Mfg#:
044121113
In Stock
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat O-Ring

ES#261234 - 038121119B - Thermostat O-Ring - Ensure a proper seal when installing your new thermostat. 50x4 - Genuine Volkswagen Audi - Audi Volkswagen

Ensure a proper seal when installing your new thermostat. 50x4

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
261234
Mfg#:
038121119B
Ships in 1-2 days
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87�C

ES#261793 - 044121113 - Thermostat - 87C - Keep your car running at the proper temperature. - Wahler - Volkswagen

Keep your car running at the proper temperature.

Brand:
Wahler - Corporate Logo
ES#:
261793
Mfg#:
044121113
Ships in 7 Business Days
$29.27 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87°C

ES#276208 - 044121113 - Thermostat - 87C - Keep your car running at the proper temperature. Does not include o-ring - Genuine Volkswagen Audi - Audi Volkswagen

Keep your car running at the proper temperature. Does not include o-ring

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
276208
Mfg#:
044121113
In Stock
ON SALE! SAVE 10%
$67.99

This product was last offered at the strikethrough price on
08-03-2026

$60.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat O-Ring - Priced Each

ES#2865801 - 038121119B - Thermostat O-Ring - Priced Each - Recommended when changing the thermostat - Febi - Audi Volkswagen

Recommended when changing the thermostat We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2865801
Mfg#:
038121119B
In Stock
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87°C

ES#5335359 - 044121113 - Thermostat - 87C - Bring your car to operating temperature. - Bremmen Parts - Audi Volkswagen

Bring your car to operating temperature. 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
5335359
Mfg#:
044121113
In Stock
ON SALE! SAVE 50%
$14.99

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

$7.50 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat O-Ring

ES#514001 - 038121119B - Thermostat O-Ring - Ensure a proper seal when installing your new thermostat. 50x4 - Victor Reinz - Audi Volkswagen

Ensure a proper seal when installing your new thermostat. 50x4

Brand:
Victor Reinz - Corporate Logo
ES#:
514001
Mfg#:
038121119B
In Stock
ON SALE!
$2.03

This product was last offered at the strikethrough price on
08-26-2026

$1.93 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 71�C

ES#1647 - 056121113E - Thermostat - 71C - With Sealing Ring, Low Temperature - Wahler - Audi Volkswagen

With Sealing Ring, Low Temperature

Brand:
Wahler - Corporate Logo
ES#:
1647
Mfg#:
056121113E
Ships in 1-2 days
$22.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#3190081 - 902-956 - Thermostat Housing - Common point of failure or leaking for the cooling system - Dorman - Audi Volkswagen

Common point of failure or leaking for the cooling system

Brand:
Dorman - Corporate Logo
ES#:
3190081
Mfg#:
902-956
Ships in 4 Business Days
$21.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87°C

ES#2084648 - 044121113 - Thermostat - 87C - Keep your car running at the proper temperature. - Meyle - Audi Volkswagen

Keep your car running at the proper temperature. 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
2084648
Mfg#:
044121113
Ships on Sep 23, 2026
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat O-Ring

ES#4034832 - 038121119B - Thermostat O-Ring - Ensure a proper seal when installing your new thermostat. 50x4 - Elring - Audi Volkswagen

Ensure a proper seal when installing your new thermostat. 50x4 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Elring - Corporate Logo
ES#:
4034832
Mfg#:
038121119B
Ships in 2 Business Days
$3.99

This product was last offered at the strikethrough price on
05-07-2026

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

Thermostat - 87°C

ES#3149395 - 044121113 - Thermostat - 87C - Keep your car running at the proper temperature. Includes o-ring - Rein - Audi Volkswagen

Keep your car running at the proper temperature. Includes o-ring 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3149395
Mfg#:
044121113
Back Ordered
ON SALE!
$11.99

This product was last offered at the strikethrough price on
08-31-2026

$11.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#2535114 - 037121121A - Thermostat Housing - Common point of failure or leaking for the cooling system, does not include O-Rings - URO - Audi Volkswagen

Common point of failure or leaking for the cooling system, does not include O-Rings 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2535114
Mfg#:
037121121A
Ships on Sep 24, 2026
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87°C

ES#2800962 - 056121113D - Thermostat - 87C - Keep your car running at the proper temperature. Does not include o-ring - Meistersatz - Audi Volkswagen

Keep your car running at the proper temperature. Does not include o-ring

Brand:
Meistersatz - Corporate Logo
ES#:
2800962
Mfg#:
056121113D
Ships in 3 Business Days
$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87°C

Keep your car running at the proper temperature. Does not include o-ring We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2812955
Mfg#:
056121113D
Ships in 1 Business Day
ON SALE! SAVE 10%
$11.99

This product was last offered at the strikethrough price on
09-03-2026

$10.75 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87°C

ES#4326781 - 068121113H - Thermostat - 87C - Bring your car to operating temperature. - Meyle - Audi Volkswagen

Bring your car to operating temperature. 5X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
4326781
Mfg#:
068121113H
Ships on Sep 23, 2026
$12.99 USD
Free Shipping
on orders $49 and up

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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