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Audi B5 A4 Quattro 1.8T

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Audi B5 A4 Quattro 1.8T Engine Cooling Parts

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Coolant Expansion Tank

ES#261828 - 8D0121403L - Coolant Expansion Tank - Includes integrated coolant level sensor - Meyle - Audi Volkswagen

Includes integrated coolant level sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
From VIN 8D-W-007800, split is in the 1998 model year

Brand:
Meyle - Corporate Logo
ES#:
261828
Mfg#:
8D0121403L
Ships on Nov 16, 2026
$30.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Cooling System Refresh Kit - Level 2

ES#2608135 - 030121121BKT3 - Cooling System Refresh Kit - Level 2 - Replace your thermostat, temp sensors, and expansion tank after performing a proper coolant system flush! - Assembled By ECS - Audi

Replace your thermostat, temp sensors, and expansion tank after performing a proper coolant system flush! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Engine codes AEB & ATW from VIN 8D-X-500001, split is in the 1999 model year

Brand:
Assembled By ECS - Corporate Logo
ES#:
2608135
Mfg#:
030121121BKT3
Ships in 1-2 days
ON SALE!
$161.99

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

$152.15 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Oil Filter Adapter Gasket

ES#270997 - 028115441C - Oil Filter Adapter Gasket - Seals the oil filter adapter to the engine block - Genuine Volkswagen Audi - Audi Volkswagen

Seals the oil filter adapter to the engine block affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Engine codes AEB & ATW

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
270997
Mfg#:
028115441C
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.

$20.99

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

$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Cooler Hose - Supply

ES#277605 - 058121058C - Oil Cooler Hose - Supply - Connects the oil cooler to the hard water pipe - Genuine Volkswagen Audi - Audi Volkswagen

Connects the oil cooler to the hard water pipe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Up to VIN 8D-X-199999, split is in the 1999 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
277605
Mfg#:
058121058C
Ships in 3 Business Days
6% off MSRP

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

$79.99

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

$74.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing

ES#2865688 - 030121121B - Thermostat Housing - Located on the water pump assembly - Febi - Audi Volkswagen

Located on the water pump assembly affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2865688
Mfg#:
030121121B
In Stock
$9.22 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Hose - Lower

ES#2872396 - 8D0121055G - Radiator Hose - Lower - Connects the lower radiator port to the water pump & reservoir - Febi - Audi Volkswagen

Connects the lower radiator port to the water pump & reservoir affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!
Up to VIN 8D-Y-120000, split is in the 2000 model year

Brand:
Febi - Corporate Logo
ES#:
2872396
Mfg#:
8D0121055G
In Stock at Vendor
$49.99

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

$48.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump

ES#2813007 - 06A121012 - Water Pump - Featuring a metal impeller - Hamburg Tech - Audi Volkswagen

Featuring a metal impeller affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813007
Mfg#:
06A121012
Ships in 2 Business Days
$47.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Expanding Nut - Priced Each

ES#2891455 - 811807577C - Expanding Nut - Priced Each - Install new hardware with your new parts. - Vaico - Audi Volkswagen

Install new hardware with your new parts. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Used in securing the coolant expansion tank

Brand:
Vaico - Corporate Logo
ES#:
2891455
Mfg#:
811807577C
In Stock
$7.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Cooler Hose - Supply

ES#4818441 - 06B121058S - Oil Cooler Hose - Supply - Connects the oil cooler to the hard water pipe - Bremmen Parts - Audi Volkswagen

Connects the oil cooler to the hard water pipe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4818441
Mfg#:
06B121058S
In Stock
ON SALE! SAVE 27%
$8.99

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

$6.52 USD
Free Shipping
on orders $49 and up

Radiator Hose - Lower

ES#3235744 - 4B0121055J - Radiator Hose - Lower - Connects the lower radiator port to the water pump and expansion tank - Gates - Audi Volkswagen

Connects the lower radiator port to the water pump and expansion tank affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Gates - Corporate Logo
ES#:
3235744
Mfg#:
4B0121055J
Ships on Jul 28, 2026
$142.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Oil Cooler Hose - Supply

ES#2627305 - 06B121058S - Oil Cooler Hose - Supply - Connects the oil cooler to the hard water pipe - Rein - Audi Volkswagen

Connects the oil cooler to the hard water pipe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2627305
Mfg#:
06B121058S
In Stock
$6.66 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Allen Bolt - Priced Each

ES#8712 - N90339605 - Allen Bolt - Priced Each - Install new hardware with your new parts. M8x37 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M8x37 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Engine codes AEB & ATW. Secures the oil filter adapter to the engine

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
8712
Mfg#:
N90339605
Ships in 3 Business Days
$6.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing J-Plug - Billet Aluminum

ES#4818842 - 1.8TJplug - Thermostat Housing J-Plug - Billet Aluminum - Strange coolant leak? It's possible you just need to upgrade your J-plug! - 40T Performance - Audi

Strange coolant leak? It's possible you just need to upgrade your J-plug! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
40T Performance - Corporate Logo
ES#:
4818842
Mfg#:
1.8TJPLUG
Ships in 6 Business Days
$45.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Anti-Freeze Tester

ES#3536250 - EZRSP102 - Anti-Freeze Tester - Don't let your engine freeze, be sure with this easy to use tester - E-Z Red Tools - Audi BMW Volkswagen Mercedes Benz MINI Porsche

Don't let your engine freeze, be sure with this easy to use tester affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
E-Z Red Tools - Corporate Logo
ES#:
3536250
Mfg#:
EZRSP102
Ships in 2 Business Days
$22.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Control Unit

ES#4908550 - 8D0959501D - Auxiliary Fan Control Unit - Controls the actuation of the radiator fan - Bremmen Parts - Audi

Controls the actuation of the radiator fan affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4908550
Mfg#:
8D0959501D
Special Order: No Guaranteed ETA
Auto Notify
$136.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Cooler Hose - Supply

ES#280012 - 06B121058S - Oil Cooler Hose - Supply - Connects the oil cooler to the hard water pipe - Genuine Volkswagen Audi - Audi Volkswagen

Connects the oil cooler to the hard water pipe affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280012
Mfg#:
06B121058S
Ships in 1-2 days
11% off MSRP

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

$37.99

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

$33.99 USD
Free Shipping
on orders $49 and up
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.

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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