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Volkswagen MK4 Engine Coolant Flanges & Parts

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ES#4348606 - Aut-mk4-cf2 - Billet Y Flange  - Billet Y flange. Eliminate the fail prone plastic flange located by the coolant reservoir. - Autobahn Autoworx - Volkswagen

Billet Y flange. Eliminate the fail prone plastic flange located by the coolant reservoir.

Brand:
Autobahn Autoworx - Corporate Logo
ES#:
4348606
Mfg#:
AUT-MK4-CF2
Special Order: No Guaranteed ETA
$62.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4465367 - 021121050E - Coolant Pipe "Crack Pipe" - Pipe from back of water pump to thermostat housing, goes under intake manifold - Dorman - Volkswagen

Pipe from back of water pump to thermostat housing, goes under intake manifold

Brand:
Dorman - Corporate Logo
ES#:
4465367
Mfg#:
021121050E
In Stock at Vendor
$61.99

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

$59.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2535201 - 06A121132Q - Coolant Flange - Located on the driver side of the cylinder head - URO - Audi Volkswagen

Located on the driver side of the cylinder head 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
For vehicles with manual transmissions

Brand:
URO - Corporate Logo
ES#:
2535201
Mfg#:
06A121132Q
In Stock
$3.61 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4070442 - 058121687 - Sealing O-Ring - Priced Each - Seals the coolant flange to the water supply pipe. 31.5x3.65 - DPH - Audi Volkswagen

Seals the coolant flange to the water supply pipe. 31.5x3.65 For vehicles with automatic transmissions only

Brand:
DPH - Corporate Logo
ES#:
4070442
Mfg#:
058121687
In Stock
$3.99

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

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#333289 - 357121140 - Coolant Flange Plug - Priced Each - Prevent leaks with a new plug - Genuine Volkswagen Audi - Audi Volkswagen

Prevent leaks with a new plug

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
333289
Mfg#:
357121140
In Stock
ON SALE!
$11.99

This product was last offered at the strikethrough price on
06-25-2026

$11.11 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#11965 - 357121140 - Coolant Flange Plug Kit - Priced Each - Includes the plug, o-ring and securing clip - MTC - Audi Volkswagen

Includes the plug, o-ring and securing clip

Brand:
MTC - Corporate Logo
ES#:
11965
Mfg#:
357121140
In Stock
ON SALE!
$3.05

This product was last offered at the strikethrough price on
06-25-2026

$2.90 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#514001 - 038121119B - Thermostat O-Ring - Ensure a proper seal when installing your new thermostat. 50x4 - Victor Reinz - Audi Volkswagen

Ensure a proper seal when installing your new thermostat. 50x4

Brand:
Victor Reinz - Corporate Logo
ES#:
514001
Mfg#:
038121119B
In Stock
$2.03 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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

Brand:
SenCom - Corporate Logo
ES#:
5446466
Mfg#:
20517GKB
Ships on Aug 18, 2026
$23.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3190061 - 902-879 - Coolant Flange - Located on the driver side of the cylinder head, this pipe contains the coolant tempature sensor - Dorman - Audi Volkswagen

Located on the driver side of the cylinder head, this pipe contains the coolant tempature sensor For vehicles with manual transmission only

Brand:
Dorman - Corporate Logo
ES#:
3190061
Mfg#:
902-879
Ships in 4 Business Days
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#277620 - 058121687 - Sealing O-Ring - Priced Each - Seals the coolant flange to the water supply pipe. 31.5x3.65 - Genuine Volkswagen Audi - Audi Volkswagen

Seals the coolant flange to the water supply pipe. 31.5x3.65 For vehicles with automatic transmissions only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
277620
Mfg#:
058121687
Ships in 1 day
11% off MSRP

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

$13.34

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

$11.88 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3449329 - N90136802 - Thermostat O-Ring - Ensure a proper seal when installing your new thermostat - Victor Reinz - Audi BMW Volkswagen

Ensure a proper seal when installing your new thermostat

Brand:
Victor Reinz - Corporate Logo
ES#:
3449329
Mfg#:
N90136802
In Stock
ON SALE! SAVE 27%
$3.99

This product was last offered at the strikethrough price on
03-15-2026

$2.90 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3190067 - 902-912 - Coolant Pipe "Crack Pipe" - Pipe from back of water pump to thermostat housing, goes under intake manifold - Dorman - Volkswagen

Pipe from back of water pump to thermostat housing, goes under intake manifold

Brand:
Dorman - Corporate Logo
ES#:
3190067
Mfg#:
902-912
Ships in 4 Business Days
$42.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#275132 - 038121121D - Thermostat Housing - Common point of failure for the cooling system on your TDI - Genuine Volkswagen Audi - Volkswagen

Common point of failure for the cooling system on your TDI For vehicles with BEW engine code only

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
275132
Mfg#:
038121121D
Ships in 1 day
10% off MSRP

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

$47.99

This product was last offered at the strikethrough price on
07-28-2026

$42.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2228834 - 06A121121C - Thermostat Housing - Common point of failure for the cooling system. Does not include O-ring. - Vaico - Audi Volkswagen

Common point of failure for the cooling system. Does not include O-ring. We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2228834
Mfg#:
06A121121C
In Stock at Vendor
$6.32 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#1844027 - 06A121132 - Coolant Flange - Located on the driver side of the cylinder head - Meyle - Volkswagen

Located on the driver side of the cylinder head 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
1844027
Mfg#:
06A121132
In Stock at Vendor
$9.35 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2865748 - 037121687 - Coolant Flange Sealing O-Ring - Priced Each - Install a new o-ring for a proper seal. 36x3.15 - Febi - Audi Volkswagen

Install a new o-ring for a proper seal. 36x3.15 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2865748
Mfg#:
037121687
Ships on Oct 23, 2026
$2.99 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!

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