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Volkswagen MK4 Engine Thermostat Parts

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Thermostat Replacement Kit

ES#2954033 - 038121121KT2 - Thermostat Replacement Kit - Maintain proper operating temperature with a new thermostat, housing and hardware - Assembled By ECS - Volkswagen

Maintain proper operating temperature with a new thermostat, housing and hardware 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with ALH engine code only

Brand:
Assembled By ECS - Corporate Logo
ES#:
2954033
Mfg#:
038121121KT2
In Stock
ON SALE! SAVE 24%
$27.99

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

$21.41 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing Cover

ES#2812861 - 021121121C - Thermostat Housing Cover - Common source of coolant leaks around your thermostat - Hamburg Tech - Volkswagen

Common source of coolant leaks around your thermostat We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2812861
Mfg#:
021121121C
Ships in 2 Business Days
$16.99 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. 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
2084648
Mfg#:
044121113
Ships on Dec 7, 2026
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80°C

ES#2813093 - 075121113D - Thermostat - 80C - Includes sealing O-Ring - Hamburg Tech - Audi Volkswagen

Includes sealing O-Ring We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813093
Mfg#:
075121113D
Ships in 2 Business Days
$14.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-Ring - Priced Each

ES#2801213 - N10139201 - O-Ring - Priced Each - O-ring for each side of the plastic bypass pipe under intake. 34.5x3.55 - Meistersatz - Audi Volkswagen

O-ring for each side of the plastic bypass pipe under intake. 34.5x3.55

Brand:
Meistersatz - Corporate Logo
ES#:
2801213
Mfg#:
N10139201
In Stock at Vendor
$4.99 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 For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Elring - Corporate Logo
ES#:
4034832
Mfg#:
038121119B
In Stock at Vendor
$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#3970027 - 050121113C - Thermostat (87C) - Prevent overheating and premature engine wear - Meyle - Audi Volkswagen

Prevent overheating and premature engine wear 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
3970027
Mfg#:
050121113C
Ships on Nov 20, 2026
Auto Notify
$12.29 USD
Free Shipping
on orders $49 and up

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 For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3149395
Mfg#:
044121113
Back Ordered
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#4872201 - 038121121 - Thermostat Housing - Common point of failure or leaking for the cooling system on your TDI. - URO - Volkswagen

Common point of failure or leaking for the cooling system on your TDI. 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
For vehicles with ALH engine code only

Brand:
URO - Corporate Logo
ES#:
4872201
Mfg#:
038121121
Ships in 1 Business Day
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat (87°C)

ES#1891980 - 050121113C - Thermostat (87C) - Prevent overheating and premature engine wear - 050121113C - MTC - Audi Volkswagen

Prevent overheating and premature engine wear - 050121113C

Brand:
MTC - Corporate Logo
ES#:
1891980
Mfg#:
050121113C
Ships in 10 Business Days
$9.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#259316 - 06A121121C - Thermostat Housing - Common point of failure for the cooling system. O-ring included. - Meyle - Audi Volkswagen

Common point of failure for the cooling system. O-ring included. 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
259316
Mfg#:
06A121121C
Back Ordered
$8.15 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing O-Ring

ES#2801137 - 021121119A - Thermostat Housing O-Ring - O-Ring between thermostat housing and cylinder head - Meistersatz - Audi Volkswagen

O-Ring between thermostat housing and cylinder head

Brand:
Meistersatz - Corporate Logo
ES#:
2801137
Mfg#:
021121119A
Ships in 4 Business Days
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#2090839 - 038121121 - Thermostat Housing - Common point of failure or leaking for the cooling system on your TDI. - MTC - Volkswagen

Common point of failure or leaking for the cooling system on your TDI. For vehicles with ALH engine code only

Brand:
MTC - Corporate Logo
ES#:
2090839
Mfg#:
038121121
Back Ordered
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing O-Ring

ES#5373591 - 021121119A - Thermostat Housing O-Ring - O-Ring between thermostat housing and cylinder head - Ajusa - Audi Volkswagen

O-Ring between thermostat housing and cylinder head

Brand:
Ajusa - Corporate Logo
ES#:
5373591
Mfg#:
021121119A
Ships in 4 Business Days
$5.99 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 4 Business Days
$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 80°C

ES#4220573 - 075121113D - Thermostat - 80C - Does not include sealing O-Ring - Rein - Audi Volkswagen

Does not include sealing O-Ring 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4220573
Mfg#:
075121113D
Ships in 4 Business Days
$11.99 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 Volkswagen

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

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