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Volkswagen MK4 Engine Cooling Parts

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Cooling System Coupler

ES#307293 - 1J0122291D - Cooling System Coupler - Keep your cooling system leak free - Genuine Volkswagen Audi - Audi Volkswagen

Keep your cooling system leak free

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
307293
Mfg#:
1J0122291D
Ships in 1-2 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.

$29.99

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

$26.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Flange

ES#275133 - 038121132C - 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 ALH engine code and automatic transmission only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
275133
Mfg#:
038121132C
Ships in 2 Business Days
33% off MSRP

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

$119.99

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

$79.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Tuning Water Pipe Kit - Stage 3

ES#2730490 - VR612VTHKWT2FKT - ECS Tuning Water Pipe Kit - Stage 3 - Includes everything in Stage 2 kit plus ECS billet aluminum water pipe in silver - Assembled By ECS - Volkswagen

Includes everything in Stage 2 kit plus ECS billet aluminum water pipe in silver 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2730490
Mfg#:
VR612VTHKWT2FKT
In Stock
ON SALE! SAVE 10%
$264.99

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

$239.79 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Thermostat Replacement Kit

ES#2765882 - G013A8J1GKT2 - 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#:
2765882
Mfg#:
G013A8J1GKT2
Back Ordered
ON SALE!
$255.99

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

$238.09 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Allen Bolt - Priced Each

ES#468239 - N10458302 - Allen Bolt - Priced Each - Install new hardware with your new parts. M6x120x80 - Genuine Volkswagen Audi - Volkswagen

Install new hardware with your new parts. M6x120x80

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
468239
Mfg#:
N10458302
In Stock
30% off MSRP

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

$4.86

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

$3.39 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose

ES#3194953 - 1J0121086BG - Coolant Hose - From water pipe and upper radiator hose to oil cooler - Vaico - Volkswagen

From water pipe and upper radiator hose to oil cooler We Price Match - Give Us A Call or Chat!
For vehicles with production date from 11/01/2000 only

Brand:
Vaico - Corporate Logo
ES#:
3194953
Mfg#:
1J0121086BG
Ships in 2 Business Days
$60.99

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

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

Glow plug harness - priced each

ES#271342 - 028971782A - Glow plug harness - priced each - Electrical connection to coolant glow plug - Genuine Volkswagen Audi - Volkswagen

Electrical connection to coolant glow plug Coolant Glow Plug Harness. For vehicles with manual transmission only - 3 required

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
271342
Mfg#:
028971782A
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.

$62.99

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

$58.74 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 10X Entries Into Our F80 M3 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

$232.42 USD
Free Shipping
This product is lifetime replacement eligible Partial 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 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
$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 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2785049
Mfg#:
075121113DKT4
Ships in 2 Business Days
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

Spring Washer - Priced Each

ES#466071 - N0122265 - Spring Washer - Priced Each - Install new hardware with your new parts. 6mm - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. 6mm Secures turbo coolant supply line to bracket

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
466071
Mfg#:
N0122265
In Stock
$3.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Control Unit

ES#5341447 - 1J0919506K - Auxiliary Fan Control Unit - 1 large 4 pin connector and 1 small 14 pin connector - Bremmen Parts - Audi Volkswagen

1 large 4 pin connector and 1 small 14 pin connector 10X Entries Into Our F80 M3 Sweepstakes
For vehicles with VIN from 9M-Y-000 001 only, split is in the 2000 model year

Brand:
Bremmen Parts - Corporate Logo
ES#:
5341447
Mfg#:
1J0919506K
In Stock
ON SALE! SAVE 15%
$52.99

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

$45.04 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Aluminum Water Pipe Kit - Stage 2

ES#1892123 - VR624VTHKWG - Aluminum Water Pipe Kit - Stage 2 - Featuring ECS black aluminum water pipe - Assembled By ECS - Volkswagen

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

Brand:
Assembled By ECS - Corporate Logo
ES#:
1892123
Mfg#:
VR624VTHKWG
In Stock
ON SALE!
$235.99

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

$222.10 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#307225 - 1J0121407D - Coolant Expansion Tank - Clean up your engine bay or replaced your cracked unit with a new coolant expansion tank - Genuine Volkswagen Audi - Volkswagen

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

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
307225
Mfg#:
1J0121407D
In Stock
7% off MSRP

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

$118.99

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

$110.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Flange Sealing O-Ring - Priced Each

ES#274529 - 037121687 - Coolant Flange Sealing O-Ring - Priced Each - Install a new o-ring for a proper seal. 36x3.15 - Genuine Volkswagen Audi - Audi Volkswagen

Install a new o-ring for a proper seal. 36x3.15

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
274529
Mfg#:
037121687
In Stock
30% off MSRP

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

$7.08

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

$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Pipe

ES#275122 - 038121065Q - Coolant Pipe - Large water pipe that connects to various hoses - Genuine Volkswagen Audi - Volkswagen

Large water pipe that connects to various hoses For vehicles with ALH engine code, manual transmission with VIN from 9M-Y-111 001 only, split is in the 2000 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
275122
Mfg#:
038121065Q
Ships in 3 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.

$234.99

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

$218.99 USD
Free Shipping
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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