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Audi B5 A4 Quattro 1.8T

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Audi B5 A4 Quattro 1.8T Engine Parts & Accessories

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Water Pump O-Ring

ES#2538531 - 06A121119 - Water Pump O-Ring - Ensure a proper seal when installing a new water pump. 53x4mm - Rein - Audi Volkswagen

Ensure a proper seal when installing a new water pump. 53x4mm 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2538531
Mfg#:
06A121119
In Stock at Vendor
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Hex Nut - Priced Each

ES#467505 - N10155210 - Hex Nut - Priced Each - Install new hardware with your new parts. M10 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M10 Secures the alternator to the bracket - lower position

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
467505
Mfg#:
N10155210
Ships in 3 Business Days
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Hex Bolt - Priced Each

ES#252214 - N0901484 - Hex Bolt - Priced Each - Install new hardware with your new parts. M6x15 - Genuine Volkswagen Audi - Audi Volkswagen

Install new hardware with your new parts. M6x15 Secures the battery tray to the vehicle

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
252214
Mfg#:
N0901484
In Stock
ON SALE! SAVE 80%
$4.99

This product was last offered at the strikethrough price on
05-14-2026

$0.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#3412050 - 8D0121403D - Coolant Expansion Tank - Includes integrated coolant level sensor - Hudson - Audi

Includes integrated coolant level sensor Up to VIN 8D-W-007799, split is in the 1998 model year

Brand:
Hudson - Corporate Logo
ES#:
3412050
Mfg#:
8D0121403D
Ships in 1-2 days
$27.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Ventilation Valve

ES#404101 - 6X0201136 - Ventilation Valve - Allows air into the tank for easy fueling - Genuine Volkswagen Audi - Audi

Allows air into the tank for easy fueling Up to VIN 8D-W-070000, split is in the 1998 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
404101
Mfg#:
6X0201136
Ships in 3 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.

$29.99

This product was last offered at the strikethrough price on
07-30-2026

$26.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

O-Ring - Priced Each

ES#4150985 - N0282222 - O-Ring - Priced Each - Ensure a proper seal with a new o-ring. 20x3.15 - Meistersatz - Audi Volkswagen

Ensure a proper seal with a new o-ring. 20x3.15 Seals the pick-up tube to the oil pump

Brand:
Meistersatz - Corporate Logo
ES#:
4150985
Mfg#:
N0282222
In Stock
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Attachment Bolt - Priced Each

ES#10968 - 8D0121200 - Radiator Attachment Bolt - Priced Each - Secures the radiator to the core support - Genuine Volkswagen Audi - Audi

Secures the radiator to the core support

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
10968
Mfg#:
8D0121200
Ships in 3 Business Days
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Hose - Lower

ES#3463131 - 4B0121055F - Radiator Hose - Lower - Connects the lower radiator port to the water pump and expansion tank - Hudson - Audi Volkswagen

Connects the lower radiator port to the water pump and expansion tank From VIN 8D-Y-120001, split is in the 2000 model year

Brand:
Hudson - Corporate Logo
ES#:
3463131
Mfg#:
4B0121055F
In Stock
ON SALE! SAVE 36%
$41.99

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

$26.84 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Silicone Breather Hose

ES#2966844 - 034-101-3025 - Silicone Breather Hose - 'L' shaped hose attached to the bleeder valve under the intake manifold - 034Motorsport - Audi

'L' shaped hose attached to the bleeder valve under the intake manifold Engine code AEB with manual transmissions

Brand:
034Motorsport - Corporate Logo
ES#:
2966844
Mfg#:
034-101-3025
Ships in 3 Business Days
$26.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Coolant Expansion Tank

ES#2802911 - 8D0121403L - Coolant Expansion Tank - Includes integrated coolant level sensor, does not include cap - Rein - Audi Volkswagen

Includes integrated coolant level sensor, does not include cap 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:
Rein - Corporate Logo
ES#:
2802911
Mfg#:
8D0121403L
Ships in 4 Business Days
$25.99 USD
Free Shipping
on orders $49 and up

Thermostat (87°C)

ES#3149450 - 050121113C - Thermostat (87C) - Prevent overheating and premature engine wear - Wahler - Audi Volkswagen

Prevent overheating and premature engine wear

Brand:
Wahler - Corporate Logo
ES#:
3149450
Mfg#:
050121113C
Ships on Aug 25, 2026
$25.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Blade

ES#2911 - 058121301B - Auxiliary Fan Blade - For the belt driven auxiliary fan - Meyle - Audi Volkswagen

For the belt driven auxiliary fan 2X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat!

Brand:
Meyle - Corporate Logo
ES#:
2911
Mfg#:
058121301B
Ships on Dec 10, 2026
$25.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Securing Clip

ES#469807 - N90431401 - Securing Clip - Secures the connecting rod to the vacuum actuator - Genuine Volkswagen Audi - Audi

Secures the connecting rod to the vacuum actuator Engine code AEB up to VIN 8D-X-199999, split is in the 1999 model year

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
469807
Mfg#:
N90431401
Back Ordered
7% off MSRP

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

$13.99

This product was last offered at the strikethrough price on
07-30-2026

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

Plastic Dowel Pin - Pack Of 25

Secures the belly pan to the fender liners 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4940358
Mfg#:
4A0805121A
Special Order: No Guaranteed ETA
Auto Notify
ON SALE! SAVE 11%
$28.99

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

$25.70 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Injector O-Ring Set

ES#2642626 - 06A906149AKT - Fuel Injector O-Ring Set - A complete set of upper and lower o-rings - Assembled By ECS - Audi

A complete set of upper and lower o-rings 10X Entries For Our 25th Anniversary Sweepstakes!
Engine code ATW

Brand:
Assembled By ECS - Corporate Logo
ES#:
2642626
Mfg#:
06A906149AKT
In Stock
ON SALE! SAVE 15%
$29.99

This product was last offered at the strikethrough price on
06-16-2026

$25.63 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Purge Valve

ES#2814234 - 1C0906517A - Purge Valve - Common cure for DTC P0441 - Hamburg Tech - Audi Volkswagen

Common cure for DTC P0441 We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2814234
Mfg#:
1C0906517A
Ships in 2 Business Days
$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

More About Engine Parts & Accessories

Whether you're maintaining or repairing your stock engine or looking for added horsepower, we have one of the most comprehensive inventories of engine parts and accessories for German cars. From hard engine parts like connecting rods, pistons, cylinder heads, short blocks, and engine timing parts to performance engine software upgrades; we have you covered.

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