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Volkswagen MK4 Engine Cooling Parts

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Cast Aluminum Thermostat Housing

ES#3553337 - 462-121-121TD - Cast Aluminum Thermostat Housing - Common point of failure for the cooling system - iABED Industries - Volkswagen

Common point of failure for the cooling system For vehicles with ALH engine code only

Brand:
iABED Industries - Corporate Logo
ES#:
3553337
Mfg#:
462-121-121TD
Back Ordered
$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Control Unit

ES#5432880 - 1J0919506E - Auxiliary Fan Control Unit - 1 large 4 pin connector and 1 small 10 pin connector - Bremmen Parts - Audi Volkswagen

1 large 4 pin connector and 1 small 10 pin connector 10X Entries Into Our F80 M3 Sweepstakes
For vehicles with VIN up to 1J-X-800000, split is in the 1999 model year, vehicles with 10 pin connectors only

Brand:
Bremmen Parts - Corporate Logo
ES#:
5432880
Mfg#:
1J0919506E
In Stock
ON SALE! SAVE 15%
$93.99

This product was last offered at the strikethrough price on
09-16-2026

$79.89 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#5388789 - 1J0121407F - Coolant Expansion Tank - Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank - Bremmen Parts - Audi Volkswagen

Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Bremmen Parts - Corporate Logo
ES#:
5388789
Mfg#:
1J0121407F
In Stock
ON SALE! SAVE 20%
$13.99

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

$11.26 USD
Free Shipping
on orders $49 and up

Upper Radiator Coupler

ES#2710753 - 1J0122291 - Upper Radiator Coupler - Coupler that connects the upper radiator hose to the radiator - Vaico - Audi Volkswagen

Coupler that connects the upper radiator hose to the radiator We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2710753
Mfg#:
1J0122291
Ships in 1 Business Day
$12.99

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

$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cooling System Coupler

ES#2597931 - 1J0122291D - Cooling System Coupler - Keep your cooling system leak free - URO - Audi Volkswagen

Keep your cooling system leak free 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
URO - Corporate Logo
ES#:
2597931
Mfg#:
1J0122291D
In Stock
$5.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Sealing O-Ring - Priced Each

ES#3419389 - N90316802 - Sealing O-Ring - Priced Each - Seal for most clip-in cooling sensors/senders. M19.6x3.6mm - Rein - Audi Volkswagen

Seal for most clip-in cooling sensors/senders. M19.6x3.6mm 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
3419389
Mfg#:
N90316802
In Stock
$2.12 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing O-Ring

ES#2394 - 021121119A - Thermostat Housing O-Ring - O-Ring between thermostat housing and cylinder head - Victor Reinz - Audi Volkswagen

O-Ring between thermostat housing and cylinder head

Brand:
Victor Reinz - Corporate Logo
ES#:
2394
Mfg#:
021121119A
In Stock at Vendor
$10.99

This product was last offered at the strikethrough price on
04-28-2026

$4.07 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#275130 - 038121121 - Thermostat Housing - Common point of failure or leaking for the cooling system on your TDI. - Genuine Volkswagen Audi - Volkswagen

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

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
275130
Mfg#:
038121121
In Stock
Limited Qty Sale
$23.99

This product was last offered at the strikethrough price on
04-07-2026

$16.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Hose - Lower

ES#307242 - 1J0122051AM - Radiator Hose - Lower - Hose from radiator to water pump - Genuine Volkswagen Audi - Volkswagen

Hose from radiator to water pump For vehicles with automatic transmission only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
307242
Mfg#:
1J0122051AM
Ships in 1-2 days
7% off MSRP

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

$163.99

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

$151.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

EGR Cooler Pipe

ES#275201 - 038131521E - EGR Cooler Pipe - Goes from the manifold to the cooler, no gaskets or hardware included - Genuine Volkswagen Audi - Volkswagen

Goes from the manifold to the cooler, no gaskets or hardware included Fits up to the 2003 model year, ALH engine codes

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
275201
Mfg#:
038131521E
Ships in 1-2 days
7% off MSRP

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

$161.99

This product was last offered at the strikethrough price on
10-02-2026

$150.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Water Pump

ES#766 - 06A121011L - Water Pump - Featuring a metal impeller - Graf - Audi Volkswagen

Featuring a metal impeller

Brand:
Graf - Corporate Logo
ES#:
766
Mfg#:
06A121011L
Ships in 1 Business Day
$49.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Aux Water Pump Rubber Retainer

ES#278153 - 066959209 - Aux Water Pump Rubber Retainer - This rubber holder keeps your electric water pump in place - Genuine Volkswagen Audi - Volkswagen

This rubber holder keeps your electric water pump in place

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
278153
Mfg#:
066959209
Ships in 1-2 days
6% off MSRP

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

$31.99

This product was last offered at the strikethrough price on
10-02-2026

$29.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3476100 - 1J0121407F - Coolant Expansion Tank - Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank - Behr - Audi Volkswagen

Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank

Brand:
Behr - Corporate Logo
ES#:
3476100
Mfg#:
1J0121407F
Ships in 1 Business Day
$32.99

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

$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Temperature Sensor

ES#2972929 - 059919501AKT2 - Coolant Temperature Sensor - Revised green 4 pin sensor, located in the cooling flange located on the side of the cylinder head - Hamburg Tech - Audi Volkswagen

Revised green 4 pin sensor, located in the cooling flange located on the side of the cylinder head We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2972929
Mfg#:
059919501AKT2
In Stock
$14.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Primary Radiator

ES#3492164 - 1J0121253S - Primary Radiator - Direct replacement 2-row radiator - Nissens - Audi Volkswagen

Direct replacement 2-row radiator We Price Match - Give Us A Call or Chat!

Brand:
Nissens - Corporate Logo
ES#:
3492164
Mfg#:
1J0121253S
In Stock at Vendor
$150.99

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

$146.99 USD
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Replacement Kit

ES#2684845 - 022121113 - Thermostat Replacement Kit - Maintain proper operating temperature with a new thermostat, housings and hardware - Assembled By ECS - Volkswagen

Maintain proper operating temperature with a new thermostat, housings and hardware 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2684845
Mfg#:
022121113
Ships in 1 Business Day
ON SALE! SAVE 13%
$166.99

This product was last offered at the strikethrough price on
04-13-2026

$145.68 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

More About Engine Cooling Parts

Optimize your engine cooling system performance and heater output with quality drive belts, coolant hoses, cooling system parts, and approved coolant fluids from ECS Tuning. Head off expensive repairs and untimely breakdowns with regularly scheduled cooling system inspection and maintenance.

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