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Volkswagen MK4 Engine Coolant Flanges & Parts

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Heavy Duty Cast Aluminum Thermostat Housing

ES#3086042 - 006660ECS01 - Heavy Duty Cast Aluminum Thermostat Housing - The last thermostat housing you'll ever need! - ECS - Audi Volkswagen

The last thermostat housing you'll ever need! 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3086042
Mfg#:
006660ECS01
In Stock
ON SALE! SAVE 25%
$85.99

This product was last offered at the strikethrough price on
06-13-2026

$64.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Billet 24v Aluminum Water Pipe - Black

ES#2848080 - 003285ECS0101 - ECS Billet 24v Aluminum Water Pipe - Black - Designed to be the last water pipe you'll need to replace - ECS - Audi Volkswagen

Designed to be the last water pipe you'll need to replace 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2848080
Mfg#:
003285ECS0101
In Stock
ON SALE! SAVE 10%
$135.99

This product was last offered at the strikethrough price on
07-14-2026

$123.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Flange Replacement Kit

ES#4017860 - CHS0647 - Coolant Flange Replacement Kit - A comprehensive kit designed to service the commonly failing cooling system components in a single repair. - Rein - Audi Volkswagen

A comprehensive kit designed to service the commonly failing cooling system components in a single repair. 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
For vehicles with manual transmission only

Brand:
Rein - Corporate Logo
ES#:
4017860
Mfg#:
CHS0647
In Stock
$141.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cast Aluminum Thermostat Housing Kit

ES#3553466 - 462-121-vr-24vKT - Cast Aluminum Thermostat Housing Kit - Replace your inferior plastic housings - iABED Industries - Audi Volkswagen

Replace your inferior plastic housings Modification to water pipe may be required. Please see description for details.

Brand:
iABED Industries - Corporate Logo
ES#:
3553466
Mfg#:
462-121-VR-24VKT
Back Ordered
Auto Notify
$251.99

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

$250.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

ECS Billet 12v Water Pipe - Black

ES#2807186 - 003244ECS0101 - ECS Billet 12v Water Pipe - Black - Bypass pipe located underneath intake manifold. Designed to be the last water pipe you'll need to replace. - ECS - Volkswagen

Bypass pipe located underneath intake manifold. Designed to be the last water pipe you'll need to replace. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2807186
Mfg#:
003244ECS0101
In Stock
ON SALE! SAVE 10%
$132.99

This product was last offered at the strikethrough price on
06-13-2026

$119.69 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing with Gasket

ES#4342251 - 022121117CS1 - Thermostat Housing with Gasket - Common point of failure or leaking for the cooling system - Febi - Audi Volkswagen

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

Brand:
Febi - Corporate Logo
ES#:
4342251
Mfg#:
022121117CS1
In Stock
$66.99

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

$52.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cast Aluminum Thermostat Housing

ES#3553457 - 462-121-VR47C - Cast Aluminum Thermostat Housing - Replace your inferior plastic housing - iABED Industries - Audi Volkswagen

Replace your inferior plastic housing Modification to water pipe may be required. Please see description for details.

Brand:
iABED Industries - Corporate Logo
ES#:
3553457
Mfg#:
462-121-VR47C
Back Ordered
Auto Notify
$169.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Billet 24v Aluminum Water Pipe - Silver

ES#2848081 - 003285ECS0102 - ECS Billet 24v Aluminum Water Pipe - Silver - Pipe from back of water pump to thermostat housing, located under intake manifold. Engineered to be the last water pipe you'll need to replace - ECS - Audi Volkswagen

Pipe from back of water pump to thermostat housing, located under intake manifold. Engineered to be the last water pipe you'll need to replace 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2848081
Mfg#:
003285ECS0102
In Stock
$135.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

ECS Billet 12v Water Pipe - Silver

ES#2807185 - 003244ECS0102 - ECS Billet 12v Water Pipe - Silver - Bypass pipe located underneath intake manifold. Designed to be the last water pipe you'll need to replace. - ECS - Volkswagen

Bypass pipe located underneath intake manifold. Designed to be the last water pipe you'll need to replace. 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2807185
Mfg#:
003244ECS0102
In Stock
ON SALE! SAVE 15%
$135.99

This product was last offered at the strikethrough price on
06-13-2026

$114.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Aluminum Water Distribution Pipe

ES#3028662 - 022121050 - Aluminum Water Distribution Pipe - Pipe from back of water pump to thermostat housing, located under intake manifold. Commonly referred to as the crack pipe. - URO - Audi Volkswagen

Pipe from back of water pump to thermostat housing, located under intake manifold. Commonly referred to as the crack pipe. 2X Entries For Our 25th Anniversary Sweepstakes!

Brand:
URO - Corporate Logo
ES#:
3028662
Mfg#:
022121050
In Stock
$53.99

This product was last offered at the strikethrough price on
02-26-2026

$38.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing Cover

ES#269571 - 022121121E - Thermostat Housing Cover - Common source of coolant leaks around your thermostat - Genuine Volkswagen Audi - Audi Volkswagen

Common source of coolant leaks around your thermostat

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
269571
Mfg#:
022121121E
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.

$52.65

This product was last offered at the strikethrough price on
02-03-2026

$47.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#4196 - 022121117C - Thermostat Housing - Common point of failure or leaking for the cooling system - Genuine Volkswagen Audi - Audi Volkswagen

Common point of failure or leaking for the cooling system

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4196
Mfg#:
022121117C
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.

$183.99

This product was last offered at the strikethrough price on
04-24-2026

$170.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cast Aluminum Cooling System Upgrade Kit

ES#3086229 - 006368ecs01a1KT - Cast Aluminum Cooling System Upgrade Kit - Replace the failure prone components in your cooling system with cast aluminum - Assembled By ECS - Audi Volkswagen

Replace the failure prone components in your cooling system with cast aluminum 10X Entries For Our 25th Anniversary Sweepstakes!
For vehicles with manual transmission or 4-speed automatic transmission only

Brand:
Assembled By ECS - Corporate Logo
ES#:
3086229
Mfg#:
006368ECS01A1KT
Back Ordered
Auto Notify
ON SALE! SAVE 24%
$231.99

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

$176.98 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cast Aluminum Coolant Flange

ES#3470644 - 462-121-132AP - Cast Aluminum Coolant Flange - Located on the driver side of the cylinder head, this pipe contains the coolant tempature sensor - iABED Industries - Audi Volkswagen

Located on the driver side of the cylinder head, this pipe contains the coolant tempature sensor For vehicles with 4-speed automatic or manual transmission from production date 09/01/2000 only

Brand:
iABED Industries - Corporate Logo
ES#:
3470644
Mfg#:
462-121-132AP
Back Ordered
Auto Notify
$49.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Allen/Hex Bolt - Priced Each

ES#6661 - N90945002 - Allen/Hex Bolt - Priced Each - Install new hardware with your new parts. M7x21.5mm - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M7x21.5mm

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
6661
Mfg#:
N90945002
In Stock
Limited Qty Sale
29% off MSRP

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

$8.49

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

$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Coolant Flanges & Parts

Replace a cracked or failed coolant flange with a brand new coolant flange to stop those leaks!

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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