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Volkswagen MK4 Engine Cooling Parts

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Cast Aluminum Thermostat Housing

ES#3470645 - 462-121-121C - Cast Aluminum Thermostat Housing - Common point of failure for the cooling system. Does not include O-ring. - iABED Industries - Volkswagen

Common point of failure for the cooling system. Does not include O-ring. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
iABED Industries - Corporate Logo
ES#:
3470645
Mfg#:
462-121-121C
Back Ordered
$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Cooler O-Ring

ES#275103 - 038117070 - Oil Cooler O-Ring - O-Ring between cover & oil cooler. 62.8mm - Genuine Volkswagen Audi - Volkswagen

O-Ring between cover & oil cooler. 62.8mm affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
275103
Mfg#:
038117070
In Stock
21% off MSRP

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

$18.99

This product was last offered at the strikethrough price on
02-23-2026

$14.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cooling System Flush Kit

ES#2784778 - CO0LANTFLUSHKT1 - Cooling System Flush Kit - Keep your cooling system working at its best by keeping it clean and free of rust and scale deposits. Includes new expansion tank cap, flush treatment & G13 coolant. - Assembled By ECS - Audi Volkswagen

Keep your cooling system working at its best by keeping it clean and free of rust and scale deposits. Includes new expansion tank cap, flush treatment & G13 coolant. 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#:
2784778
Mfg#:
CO0LANTFLUSHKT1
In Stock
ON SALE! SAVE 10%
$65.99

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

$59.16 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Coolant Hose

ES#307251 - 1J0122073A - Coolant Hose - From hard coolant pipe to heater core - Genuine Volkswagen Audi - Volkswagen

From hard coolant pipe to heater core affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with production date up to 10/31/2000 only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
307251
Mfg#:
1J0122073A
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.

$62.99

This product was last offered at the strikethrough price on
06-07-2026

$58.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Temperature Sensor With O-Ring & Clip - 4 Pin

ES#2802189 - 059919501AKT - Coolant Temperature Sensor With O-Ring & Clip - 4 Pin - Updated Green sensor with square/round connector. Please check existing sensor color - Rein - Audi Volkswagen

Updated Green sensor with square/round connector. Please check existing sensor color 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#:
2802189
Mfg#:
059919501AKT
In Stock
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#1692 - 1J0121321B - Expansion Tank Cap - Keep proper pressure in your coolant system - Febi - Audi Volkswagen Porsche

Keep proper pressure in your coolant system affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
1692
Mfg#:
1J0121321B
In Stock
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Tuning Water Pipe Kit - Stage 3

ES#1892127 - VR612VTHKWT2G - ECS Tuning Water Pipe Kit - Stage 3 - Includes everything from Stage 2 kit plus ECS billet aluminum water pipe in black - Assembled By ECS - Volkswagen

Includes everything from Stage 2 kit plus ECS billet aluminum water pipe in black 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#:
1892127
Mfg#:
VR612VTHKWT2G
In Stock
ON SALE! SAVE 11%
$259.99

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

$231.57 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Radiator Installation Kit With Radiator Mounts And Hardware

ES#2588189 - 1J0806155EKT1 - Radiator Installation Kit With Radiator Mounts And Hardware - When replacing or reinstalling your radiator do not reuse your old, worn radiator mounts. - Genuine Volkswagen Audi - Volkswagen

When replacing or reinstalling your radiator do not reuse your old, worn radiator mounts. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with factory air conditioning

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2588189
Mfg#:
1J0806155EKT1
Ships in 1-2 days
$115.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

7 Piece Silicone Coolant Hose Kit - Red

ES#1843969 - FMKC005R - 7 Piece Silicone Coolant Hose Kit - Red - Replace your stock rubber hoses with silicone - Forge - Volkswagen

Replace your stock rubber hoses with silicone affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with AWP engine code only

Brand:
Forge - Corporate Logo
ES#:
1843969
Mfg#:
FMKC005R
Back Ordered
$230.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

7 Piece Silicone Coolant Hose Kit - Blue

ES#1843970 - FMKC005B - 7 Piece Silicone Coolant Hose Kit - Blue - Replace your stock rubber hoses with silicone - Forge - Volkswagen

Replace your stock rubber hoses with silicone affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with AWP engine code only

Brand:
Forge - Corporate Logo
ES#:
1843970
Mfg#:
FMKC005B
Back Ordered
$230.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Replacement Kit

ES#2581583 - 050121113CKT1 - Thermostat Replacement Kit - Maintain proper operating temperature with a new thermostat, housing and hardware - Genuine Volkswagen Audi - Audi Volkswagen

Maintain proper operating temperature with a new thermostat, housing and hardware affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2581583
Mfg#:
050121113CKT1
In Stock at Vendor
$119.99

This product was last offered at the strikethrough price on
03-18-2026

$114.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Pipe

ES#4846045 - 038121065Q - Coolant Pipe - Large water pipe that connects to various hoses - Vaico - Volkswagen

Large water pipe that connects to various hoses affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
For vehicles with ALH engine code, manual transmission with VIN from 9M-Y-111 001 only, split is in the 2000 model year

Brand:
Vaico - Corporate Logo
ES#:
4846045
Mfg#:
038121065Q
Special Order: No Guaranteed ETA
Auto Notify
$228.99 USD
Free Shipping
on orders $49 and up

Thermostat Replacement Kit

ES#2785049 - 075121113DKT4 - Thermostat Replacement Kit - Featuring a low-temperature thermostat - Assembled By ECS - Volkswagen

Featuring a low-temperature thermostat 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#:
2785049
Mfg#:
075121113DKT4
In Stock
ON SALE! SAVE 16%
$135.99

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

$114.44 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Water Pump - With Metal Impeller

ES#1831921 - 021121004X - Water Pump - With Metal Impeller - Water pump with metal impeller and o-ring - Hepu - Volkswagen

Water pump with metal impeller and o-ring affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Hepu - Corporate Logo
ES#:
1831921
Mfg#:
021121004X
Ships in 1 Business Day
$113.56 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Hose - Upper

ES#307268 - 1J0122101CC - Radiator Hose - Upper - Includes a T fitting to supply coolant to the auxiliary water pump - Genuine Volkswagen Audi - Volkswagen

Includes a T fitting to supply coolant to the auxiliary water pump affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with AWW or AWP engine code with 5-speed automatic transmission only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
307268
Mfg#:
1J0122101CC
In Stock at Vendor
$230.99

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

$224.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Spring Band Clamp - Priced Each

ES#261790 - N90687201 - Spring Band Clamp - Priced Each - Ensure a leak free installation. 40x12 - Genuine Volkswagen Audi - Audi Volkswagen

Ensure a leak free installation. 40x12 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
261790
Mfg#:
N90687201
Ships Today
$6.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime 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.

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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