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Audi B5 S4 2.7T

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Audi B5 S4 2.7T Engine Parts & Accessories

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Expansion Tank Cap Seal

ES#2598146 - 1H0121687A - Expansion Tank Cap Seal - Seals the expansion tank cap to the reservoir. 28.5x3.8 - Vaico - Audi Volkswagen

Seals the expansion tank cap to the reservoir. 28.5x3.8 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Vaico - Corporate Logo
ES#:
2598146
Mfg#:
1H0121687A
In Stock at Vendor
$3.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat - 87C

ES#1500 - 078121113F - Thermostat - 87C - Includes sealing O-Ring - Wahler - Audi Volkswagen

Includes sealing O-Ring affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Wahler - Corporate Logo
ES#:
1500
Mfg#:
078121113F
Ships on Jul 1, 2026
$27.09 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Injector Adapter Kit

This hardware kit allows you to install EV14 injectors in your 2.7T engine equipped with an RS4 intake manifold and fuel rail. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4030472
Mfg#:
034-106-3019
Ships in 2 Business Days
$27.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Fan Blade

ES#2813132 - 078121301E - Auxiliary Fan Blade - For the belt driven auxiliary fan - Hamburg Tech - Audi Volkswagen

For the belt driven auxiliary fan 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#:
2813132
Mfg#:
078121301E
Ships in 1 Business Day
$26.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Water Pump Gasket

ES#3479 - 078121043A - Water Pump Gasket - Ensure a proper seal when installing a new water pump - Victor Reinz - Audi Volkswagen

Ensure a proper seal when installing a new water pump affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Victor Reinz - Corporate Logo
ES#:
3479
Mfg#:
078121043A
In Stock at Vendor
$8.99 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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
10968
Mfg#:
8D0121200
Ships in 1 day
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Multipurpose Relay - Priced Each

Replacement 4 pin relay affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Used for fan control

Brand:
Wehrle - Corporate Logo
ES#:
3437884
Mfg#:
4H0951253
In Stock at Vendor
$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 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Bremmen Parts - Corporate Logo
ES#:
4940358
Mfg#:
4A0805121A
Special Order: No Guaranteed ETA
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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

Relay Roller

ES#1306668 - 078109244H - Relay Roller - The idler pulley for the toothed timing belt - GMB - Audi Volkswagen

The idler pulley for the toothed timing belt affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
GMB - Corporate Logo
ES#:
1306668
Mfg#:
078109244H
In Stock at Vendor
$25.99

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

$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Radiator Hose - Lower

ES#3463358 - 8D0121055T - Radiator Hose - Lower - Connects the lower radiator port to the thermostat housing - Hudson - Audi Volkswagen

Connects the lower radiator port to the thermostat housing affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Hudson - Corporate Logo
ES#:
3463358
Mfg#:
8D0121055T
Ships in 3 Business Days
$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Auxiliary Water Pump Hose

ES#6800 - 078121082E - Auxiliary Water Pump Hose - Connects the auxiliary water pump to the coolant pipe under the intake manifold - Original Equipment Supplier - Audi

Connects the auxiliary water pump to the coolant pipe under the intake manifold affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Original Equipment Supplier - Corporate Logo
ES#:
6800
Mfg#:
078121082E
Back Ordered
$24.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Snub Mount - Priced Each

ES#2627344 - 8D0199339P - Snub Mount - Priced Each - Reduce excessive engine vibrations - Rein - Audi Volkswagen

Reduce excessive engine vibrations affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2627344
Mfg#:
8D0199339P
Back Ordered
$8.15 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Sealing Washer - Priced Each

ES#4305465 - N0138128 - Sealing Washer - Priced Each - Install new hardware with your new parts. 12x15.5x1.5 - Fischer and Plath - Audi Volkswagen

Install new hardware with your new parts. 12x15.5x1.5 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Seals the supply line from the fuel filter to the engine. Two required

Brand:
Fischer and Plath - Corporate Logo
ES#:
4305465
Mfg#:
N0138128
Ships in 8 Business Days
$1.01 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Multipurpose Relay - Priced Each

ES#3437886 - 4H0951253 - Multipurpose Relay - Priced Each - Replacement 4 pin relay - Flosser - Audi Volkswagen

Replacement 4 pin relay affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Used for fan control

Brand:
Flosser - Corporate Logo
ES#:
3437886
Mfg#:
4H0951253
In Stock at Vendor
$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Line Bracket

ES#337359 - 3B0133687A - Fuel Line Bracket - Holds 3 fuel lines in place. - Genuine Volkswagen Audi - Audi Volkswagen

Holds 3 fuel lines in place. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
337359
Mfg#:
3B0133687A
Ships in 3 Business Days
8% off MSRP

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

$12.99

This product was last offered at the strikethrough price on
06-08-2026

$11.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Supertech Valve Spring Shim - Priced Each

ID:.515" / OD:0.796" / 0.015" thick affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Supertech - Corporate Logo
ES#:
4735967
Mfg#:
SS-3004
Ships in 8 Business Days
$1.99 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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