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Audi A4 Engine Heating & Cooling Hoses

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water pump Hose

ES#450261 - 8K0121051C - water pump Hose - Connects the lower radiator hose t-fitting to the water pump - Genuine Volkswagen Audi - Audi

Connects the lower radiator hose t-fitting to the water pump Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
450261
Mfg#:
8K0121051C
Ships in 1 day
13% off MSRP

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

$115.00

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

$99.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Coolant Supply Hose

ES#441709 - 8E1819371T - Coolant Supply Hose - Connects the coolant flange to the heater core pipe - Genuine Volkswagen Audi - Audi

Connects the coolant flange to the heater core pipe Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
441709
Mfg#:
8E1819371T
Ships in 4 Business Days
3% off MSRP

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

$123.99

This product was last offered at the strikethrough price on
10-28-2026

$119.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Radiator Hose - Lower

ES#2580402 - 8E0121049L - Radiator Hose - Lower - Connects the lower radiator port to the expansion tank and thermostat housing - Original Equipment Supplier - Audi

Connects the lower radiator port to the expansion tank and thermostat housing Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Original Equipment Supplier - Corporate Logo
ES#:
2580402
Mfg#:
8E0121049L
Back Ordered
1% off MSRP

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

$119.60

This product was last offered at the strikethrough price on
10-28-2026

$117.99 USD
Free Shipping

Coolant Bypass Hose

ES#5341426 - 06L121081K - Coolant Bypass Hose - connects to coolant hose connector that mounts in the cylinder head - Rein - Audi

connects to coolant hose connector that mounts in the cylinder head 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Rein - Corporate Logo
ES#:
5341426
Mfg#:
06L121081K
In Stock at Vendor
$45.99 USD
Free Shipping
on orders $49 and up

Radiator Hose - Lower

ES#2872397 - 8D0121055T - Radiator Hose - Lower - Connects the lower radiator port to the thermostat housing - Febi - Audi Volkswagen

Connects the lower radiator port to the thermostat housing Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!
From VIN 8D -X-003501, split is in the 1999 model year

Brand:
Febi - Corporate Logo
ES#:
2872397
Mfg#:
8D0121055T
In Stock
$24.99

This product was last offered at the strikethrough price on
05-13-2026

$23.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose

ES#4818503 - 078121096AD - Coolant Hose - Connects coolant pipe to oil cooler housing - Bremmen Parts - Audi Volkswagen

Connects coolant pipe to oil cooler housing 10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

From the 2000 model year

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818503
Mfg#:
078121096AD
In Stock
ON SALE! SAVE 15%
$19.99

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

$16.99 USD
Free Shipping
on orders $49 and up

Heater Core Hose - Supply

ES#2627303 - 8E1819371B - Heater Core Hose - Supply - Connects the flange to the heater core pipe - Rein - Audi

Connects the flange to the heater core pipe 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2627303
Mfg#:
8E1819371B
In Stock
$29.99

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

$20.95 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Hose

ES#4818442 - 06B121101A - Coolant Hose - Connects the hard water pipe to the rear coolant flange - Bremmen Parts - Audi

Connects the hard water pipe to the rear coolant flange 10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818442
Mfg#:
06B121101A
In Stock
ON SALE! SAVE 20%
$21.99

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

$17.59 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Turbocharger Coolant hose - Supply

ES#281438 - 06H121497B - Turbocharger Coolant hose - Supply - Supplies coolant to the turbocharger - Genuine Volkswagen Audi - Audi

Supplies coolant to the turbocharger Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281438
Mfg#:
06H121497B
Ships in 1 day
9% off MSRP

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

$153.99

This product was last offered at the strikethrough price on
10-05-2026

$139.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Expansion Tank Upper Hose

ES#5433827 - 8K0121081AB - Expansion Tank Upper Hose - Overflow relief hose for the radiator - URO - Audi

Overflow relief hose for the radiator 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
URO - Corporate Logo
ES#:
5433827
Mfg#:
8K0121081AB
Ships in 9 Business Days
$23.50 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Heater Core Hose - Return

ES#452780 - 8K1819371AB - Heater Core Hose - Return - Connects the heater core to the hard water pipe - Genuine Volkswagen Audi - Audi

Connects the heater core to the hard water pipe Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
Up to the 2012 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
452780
Mfg#:
8K1819371AB
Ships in 1 day
13% off MSRP

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

$150.99

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

$130.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

RacingLine Billet Coolant Outlet - EA888.3 / EA888.4

ES#5386705 - VWR140014 - RacingLine Billet Coolant Outlet - EA888.3 / EA888.4 - The ultimate long-term fix for the brittle plastic factory part. - Racingline - Audi Volkswagen

The ultimate long-term fix for the brittle plastic factory part. Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Racingline - Corporate Logo
ES#:
5386705
Mfg#:
VWR140014
Back Ordered
ON SALE! SAVE 11%
$39.99

This product was last offered at the strikethrough price on
10-26-2026

$35.41 USD
Free Shipping
on orders $49 and up

Lower Radiator Hose

ES#3180935 - 8W0122055L - Lower Radiator Hose - Genuine Lower hose - Genuine Volkswagen Audi - Audi

Genuine Lower hose Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3180935
Mfg#:
8W0122055L
Ships in 8 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.

$211.99

This product was last offered at the strikethrough price on
10-26-2026

$190.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank Hose

ES#4809603 - 8K0121081AH - Coolant Expansion Tank Hose - Located between the coolant expansion tank and the cylinder head coolant flange - Rein - Audi

Located between the coolant expansion tank and the cylinder head coolant flange 2X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4809603
Mfg#:
8K0121081AH
Ships in 3 Business Days
$53.99 USD
Free Shipping
on orders $49 and up

Coolant Return Hose

ES#4818440 - 06B121058BD - Coolant Return Hose - Connects the hard water pipe to the oil cooler - Bremmen Parts - Audi

Connects the hard water pipe to the oil cooler 10X Entries Into Our F80 M3 Sweepstakes Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818440
Mfg#:
06B121058BD
In Stock
ON SALE! SAVE 15%
$16.99

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

$14.44 USD
Free Shipping
on orders $49 and up

Heater Core Hose - Return

ES#441716 - 8E1819373R - Heater Core Hose - Return - Connects the heater core to the hard coolant pipe - Genuine Volkswagen Audi - Audi

Connects the heater core to the hard coolant pipe Earn 5% back in ECS Rewards on orders placed 10/26/26 - 10/31/26. Redeem 11/26/26 - 12/1/26. Terms & conditions apply

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
441716
Mfg#:
8E1819373R
Ships in 3 Business Days
2% off MSRP

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

$121.99

This product was last offered at the strikethrough price on
10-28-2026

$118.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Heating & Cooling Hoses

Over time, the rubber cooling hoses in your engine's cooling system become brittle and can burst or crack, resulting in a coolant leak. Replace old and tired coolant hoses with OEM cooling hoses or quality aftermarket options to save some money.

Let us help you find the parts that fit your Audi

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Manufacturer names and/or part numbers are used only for identification purposes.

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