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Audi A4 Engine Coolant Flanges & Parts

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Expansion Tank Cap

ES#2871116 - 3B0121321 - Expansion Tank Cap - Keep proper pressure in your coolant system - Febi - Audi

Keep proper pressure in your coolant system 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
For use with late model expansion tank, requires minor modification of coolant system to work

Brand:
Febi - Corporate Logo
ES#:
2871116
Mfg#:
3B0121321
In Stock at Vendor
$10.04 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cylinder Head Cooling Flange

ES#3537192 - 06B121132E - Cylinder Head Cooling Flange - Located at the rear of cylinder head, includes o-rings - Hamburg Tech - Audi

Located at the rear of cylinder head, includes o-rings We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
3537192
Mfg#:
06B121132E
Ships in 1 Business Day
$9.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose Flange

ES#3139063 - 06D121132C - Coolant Hose Flange - Located rear engine, this flange houses the temp sensor - Hudson - Audi

Located rear engine, this flange houses the temp sensor

Brand:
Hudson - Corporate Logo
ES#:
3139063
Mfg#:
06D121132C
Ships in 1-2 days
$17.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cylinder Head Cooling Flange

ES#3448802 - 06B121132E - Cylinder Head Cooling Flange - Located at the rear of cylinder head, includes o-rings - Meyle - Audi

Located at the rear of cylinder head, includes o-rings 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
3448802
Mfg#:
06B121132E
Ships on Dec 3, 2026
$15.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Sensor Retaining Clip - Priced Each

ES#2865558 - 025121142 - Sensor Retaining Clip - Priced Each - Secures the coolant temperature sensor in place - Febi - Audi Volkswagen

Secures the coolant temperature sensor in place 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2865558
Mfg#:
025121142
Ships on Oct 20, 2026
Auto Notify
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#2709988 - 06B121121l - Thermostat Housing - Located on the left side of the engine block - URO - Audi Volkswagen

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

Brand:
URO - Corporate Logo
ES#:
2709988
Mfg#:
06B121121L
Ships in 1 Business Day
$4.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat O-Ring

ES#4034832 - 038121119B - Thermostat O-Ring - Ensure a proper seal when installing your new thermostat. 50x4 - Elring - Audi Volkswagen

Ensure a proper seal when installing your new thermostat. 50x4 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Elring - Corporate Logo
ES#:
4034832
Mfg#:
038121119B
In Stock at Vendor
$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

Sealing O-Ring - Priced Each

ES#2469 - 037121687 - Sealing O-Ring - Priced Each - Install a new o-ring for a proper seal. 36x3.15 - Victor Reinz - Audi Volkswagen

Install a new o-ring for a proper seal. 36x3.15 Seals the coolant flange to the cylinder head

Brand:
Victor Reinz - Corporate Logo
ES#:
2469
Mfg#:
037121687
In Stock at Vendor
$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

Cylinder Head Coolant Flange

ES#3190063 - 902-886 - Cylinder Head Coolant Flange - Located on the back of the cylinder head - Dorman - Audi Volkswagen

Located on the back of the cylinder head

Brand:
Dorman - Corporate Logo
ES#:
3190063
Mfg#:
902-886
In Stock at Vendor
$13.99

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

$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose Flange

ES#3691369 - 06D121132C - Coolant Hose Flange - Located rear engine, this flange houses the temp sensor - Meyle - Audi

Located rear engine, this flange houses the temp sensor 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
3691369
Mfg#:
06D121132C
Ships on Nov 20, 2026
Auto Notify
$12.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-Ring - Priced Each

ES#3364905 - WHT001688 - O-Ring - Priced Each - Seals the cooling flange to cylinder head. 32x3 - Genuine Porsche - Audi Volkswagen

Seals the cooling flange to cylinder head. 32x3

Brand:
Genuine Porsche - Corporate Logo
ES#:
3364905
Mfg#:
WHT001688
Ships in 4 Business Days
$5.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-Ring

ES#280259 - 06C121119A - O-Ring - O-Ring for the cylinder head coolant pipe - Genuine Volkswagen Audi - Audi

O-Ring for the cylinder head coolant pipe

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280259
Mfg#:
06C121119A
Ships in 1-2 days
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Square Washer

ES#280199 - 06C103552 - Square Washer - Washer that goes between the gears of the oil pump - Genuine Volkswagen Audi - Audi

Washer that goes between the gears of the oil pump

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280199
Mfg#:
06C103552
In Stock
ON SALE! SAVE 78%
$51.03

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

$11.42 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cylinder Head Coolant Flange

ES#3142687 - 058121132COE - Cylinder Head Coolant Flange - Located on the back of the cylinder head - Hudson - Audi Volkswagen

Located on the back of the cylinder head

Brand:
Hudson - Corporate Logo
ES#:
3142687
Mfg#:
058121132COE
Ships in 1-2 days
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cylinder Head Coolant Flange

ES#2913 - 058121132 - Cylinder Head Coolant Flange - Located on the back of the cylinder head - Meyle - Audi Volkswagen

Located on the back 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#:
2913
Mfg#:
058121132
Ships on Dec 3, 2026
$10.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-RING (36 X 3.15MM)

ES#2800836 - 37121687 - O-RING (36 X 3.15MM) - Meistersatz - Audi Volkswagen

Brand:
Meistersatz - Corporate Logo
ES#:
2800836
Mfg#:
37121687
In Stock at Vendor
$4.99 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 Audi

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