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Volkswagen MK4 Engine Cooling Parts

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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
In Stock
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump Replacement Kit

ES#2730260 - 021121004X - Water Pump Replacement Kit - Refresh your accessory belt system during your water pump replacement - Assembled By ECS - Volkswagen

Refresh your accessory belt system during your water pump replacement 10X Entries Into Our F80 M3 Sweepstakes
For vehicles without air conditioning

Brand:
Assembled By ECS - Corporate Logo
ES#:
2730260
Mfg#:
021121004X
Ships in 1-2 days
$380.99

This product was last offered at the strikethrough price on
06-22-2026

$316.99 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Engine Fan Cowl

ES#252651 - 1J0121205BB41 - Engine Fan Cowl - Plastic surround that encases the fans - Genuine Volkswagen Audi - Audi Volkswagen

Plastic surround that encases the fans

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
252651
Mfg#:
1J0121205BB41
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.

$341.99

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

$316.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat O-Ring

ES#1848432 - N90136802 - Thermostat O-Ring - Ensure a proper seal when installing your new thermostat - Genuine Volkswagen Audi - Audi Volkswagen

Ensure a proper seal when installing your new thermostat

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
1848432
Mfg#:
N90136802
In Stock
10% off MSRP

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

$7.80

This product was last offered at the strikethrough price on
10-01-2026

$7.02 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Assembly - 290MM

ES#3492171 - 1J0959455R - Auxiliary Fan Assembly - 290MM - Direct replacement auxiliary fan. Please check your stock fan size before ordering. - Nissens - Audi Volkswagen

Direct replacement auxiliary fan. Please check your stock fan size before ordering. We Price Match - Give Us A Call or Chat!

Brand:
Nissens - Corporate Logo
ES#:
3492171
Mfg#:
1J0959455R
Ships in 6 Business Days
$315.33 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Primary Fan Assembly - 345MM

ES#2816134 - 6X0959455F - Primary Fan Assembly - 345MM - Main fan responsible for pulling air through your radiator. - Hamburg Tech - Audi Volkswagen

Main fan responsible for pulling air through your radiator. We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2816134
Mfg#:
6X0959455F
Ships in 2 Business Days
$62.99 USD
Free Shipping
on orders $49 and up

Upper Radiator Coupler

ES#10458 - 1J0122291 - Upper Radiator Coupler - Coupler that connects the upper radiator hose to the radiator - Genuine Volkswagen Audi - Volkswagen

Coupler that connects the upper radiator hose to the radiator

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
10458
Mfg#:
1J0122291
Ships in 5 Business Days
10% off MSRP

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

$48.99

This product was last offered at the strikethrough price on
10-01-2026

$43.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Cap

ES#261042 - 1J0121321B - Expansion Tank Cap - Keep proper pressure in your coolant system - Genuine Volkswagen Audi - Audi Volkswagen

Keep proper pressure in your coolant system

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
261042
Mfg#:
1J0121321B
Ships in 5 Business Days
30% off MSRP

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

$39.99

This product was last offered at the strikethrough price on
10-01-2026

$27.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cooling System Pressure Tester

ES#2748355 - VAG1274/8BKT - Cooling System Pressure Tester - Test for cooling system leaks - Genuine Volkswagen Audi - Volkswagen

Test for cooling system leaks

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2748355
Mfg#:
VAG1274/8BKT
Ships on Nov 11, 2026
$300.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Seal

ES#280024 - 06B121687 - Seal - Install a new seal for a proper seal. 20.5x5.5 - Genuine Volkswagen Audi - Volkswagen

Install a new seal for a proper seal. 20.5x5.5 For vehicles with VIN from 9M-Y-085 001 only, split is in the 2000 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280024
Mfg#:
06B121687
Ships in 1-2 days
14% off MSRP

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

$6.99

This product was last offered at the strikethrough price on
08-09-2026

$6.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Aluminum Water Pipe Kit - Stage 2

ES#2718487 - VR624VTHKR324 - Aluminum Water Pipe Kit - Stage 2 - Featuring ECS silver aluminum water pipe - Assembled By ECS - Audi Volkswagen

Featuring ECS silver aluminum water pipe 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2718487
Mfg#:
VR624VTHKR324
Ships in 1 Business Day
ON SALE!
$319.51

This product was last offered at the strikethrough price on
06-18-2026

$299.64 USD
Free Shipping
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 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
10-01-2026

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

Aluminum Thermostat Housing Kit

ES#3553465 - 462-121-vr-afpKT - Aluminum Thermostat Housing Kit - Replace your inferior plastic housings - iABED Industries - Volkswagen

Replace your inferior plastic housings

Brand:
iABED Industries - Corporate Logo
ES#:
3553465
Mfg#:
462-121-VR-AFPKT
Back Ordered
$286.99

This product was last offered at the strikethrough price on
04-16-2026

$285.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Cooling System Refresh Kit

ES#2581295 - MKIVGLICOOLKT - ECS Cooling System Refresh Kit - The most common failure points in your cars cooling system - Assembled By ECS - Volkswagen

The most common failure points in your cars cooling system 10X Entries Into Our F80 M3 Sweepstakes
For vehicles with AWW or AWD engine code only. Also fits vehicles with AWP engine code with manual transmission.

Brand:
Assembled By ECS - Corporate Logo
ES#:
2581295
Mfg#:
MKIVGLICOOLKT
Ships in 1 Business Day
ON SALE!
$301.99

This product was last offered at the strikethrough price on
08-13-2026

$285.77 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement

Coolant Flange

ES#275136 - 038121133A - Coolant Flange - Located on the left side of the cylinder head - Genuine Volkswagen Audi - Volkswagen

Located on the left side of the cylinder head For vehicles with manual transmission only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
275136
Mfg#:
038121133A
Ships in 4 Business 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.

$300.99

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

$279.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Radiator Fan Shroud

ES#4361999 - 34-2301 - Radiator Fan Shroud - Allows you to run a 9" & 13" Spal slim fan setup - Fabless Manufacturing - Volkswagen

Allows you to run a 9" & 13" Spal slim fan setup

Brand:
Fabless Manufacturing - Corporate Logo
ES#:
4361999
Mfg#:
34-2301
Ships on Oct 23, 2026
$279.00 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

ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

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