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Audi S4 Engine Parts & Accessories

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Alternator - 120 Amps

ES#259915 - 078903016H - Alternator - 120 Amps - Brand new, no core charge - Valeo - Audi

Brand new, no core charge We Price Match - Give Us A Call or Chat!
For cars that came with Valeo alternators. Please check existing alternator part number before ordering

Brand:
Valeo - Corporate Logo
ES#:
259915
Mfg#:
078903016H
Back Ordered
$400.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Unitronic Supercharger Pulley Kit For 3.0TFSI

ES#4821282 - UH016BTA - Unitronic Supercharger Pulley Kit For 3.0TFSI - Unitronic's Supercharger Pulley Upgrade effectively raises boost levels by increasing the speed in which the supercharger spins. - Unitronic - Audi

Unitronic's Supercharger Pulley Upgrade effectively raises boost levels by increasing the speed in which the supercharger spins.

Brand:
Unitronic - Corporate Logo
ES#:
4821282
Mfg#:
UH016BTA
Ships in 2 Business Days
$199.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Housing Gasket

ES#284820 - 079121119 - Thermostat Housing Gasket - Must be replaced when replacing the thermostat - Genuine Volkswagen Audi - Audi

Must be replaced when replacing the thermostat

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
284820
Mfg#:
079121119
Ships Today
13% off MSRP

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

$22.99

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

$19.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Billet MAF Housing - Bosch Style (Early) 85mm ID

ES#3419739 - 034-108-6006 - Billet MAF Housing - Bosch Style (Early) 85mm ID - Perfect for use in upgraded turbo cars with larger injectors and appropriate software - 034Motorsport - Audi

Perfect for use in upgraded turbo cars with larger injectors and appropriate software 2X Entries Into Our F80 M3 Sweepstakes
Fits models with Bosch style MAF sensor - Up to the 2000 model year

Brand:
034Motorsport - Corporate Logo
ES#:
3419739
Mfg#:
034-108-6006
Ships in 2 Business Days
$133.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Relay

ES#2899229 - 4H0951253C - Relay - Make sure your electrical components are in working order - Vemo - Audi Volkswagen

Make sure your electrical components are in working order

Brand:
Vemo - Corporate Logo
ES#:
2899229
Mfg#:
4H0951253C
Ships in 1 Business Day
$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Oil Service Kit

ES#250241 - C6A6BKH5-40 - Oil Service Kit - Includes OE oil filter, drain plug/washer, and 7 liters of Pentosin 5w-40 - Assembled By ECS - Audi

Includes OE oil filter, drain plug/washer, and 7 liters of Pentosin 5w-40 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
250241
Mfg#:
C6A6BKH5-40
In Stock
ON SALE!
$136.99

This product was last offered at the strikethrough price on
09-14-2026

$132.57 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement

Cam Chain Tensioner - Cylinders 4-6 (Left)

ES#2813114 - 078109087C - Cam Chain Tensioner - Cylinders 4-6 (Left) - Applies tension to the camshaft timing chain - Hamburg Tech - Audi Volkswagen

Applies tension to the camshaft timing chain We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
2813114
Mfg#:
078109087C
Ships in 1 Business Day
$197.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

AWE Track Edition Conversion Kit - B8/B8.5 S4/S5 - For 90mm Tips

ES#4044021 - 3820-41006 - AWE Track Edition Conversion Kit - B8/B8.5 S4/S5 - For 90mm Tips - Looking to crank it up a notch? - AWE - Audi

Looking to crank it up a notch? 2X Entries Into Our F80 M3 Sweepstakes

Brand:
AWE - Corporate Logo
ES#:
4044021
Mfg#:
3820-41006
Ships on Nov 24, 2026
15% off MSRP

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

$464.99

This product was last offered at the strikethrough price on
05-11-2026

$395.00 USD
This product is lifetime replacement eligible Lifetime Replacement

Sealing Washer - Priced Each

ES#2561282 - N0138514 - Sealing Washer - Priced Each - Used with the banjo bolt to create a leak free seal. 12x18 - Rein - Audi Volkswagen

Used with the banjo bolt to create a leak free seal. 12x18 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
2561282
Mfg#:
N0138514
In Stock
$1.40 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Thermostat Hose O-ring

ES#4370055 - 06E121119H - Thermostat Hose O-ring - Seals the coolant pipe to the thermostat housing. 23x28.4x4.5 - Victor Reinz - Audi

Seals the coolant pipe to the thermostat housing. 23x28.4x4.5

Brand:
Victor Reinz - Corporate Logo
ES#:
4370055
Mfg#:
06E121119H
Ships in 5 Business Days
$3.99

This product was last offered at the strikethrough price on
10-31-2026

$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Fuel Filter

ES#252151 - 441201511C - Fuel Filter - Keep your engine running like new - Mahle - Audi Volkswagen

Keep your engine running like new

Brand:
Mahle - Corporate Logo
ES#:
252151
Mfg#:
441201511C
Ships in 1 Business Day
$43.70

This product was last offered at the strikethrough price on
10-16-2026

$39.29 USD
Free Shipping
on orders $49 and up

Left & Right Timing Chain Kit

ES#2593410 - 079109229LKT - Left & Right Timing Chain Kit - This kit comes with the necessary timing chains and guides to get your timing job done, does not include hardware - Assembled By ECS - Audi

This kit comes with the necessary timing chains and guides to get your timing job done, does not include hardware 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
2593410
Mfg#:
079109229LKT
In Stock
ON SALE!
$392.37 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cam Chain Tensioner - Cylinders 1-3 (Right)

ES#3082198 - 078109088H - Cam Chain Tensioner - Cylinders 1-3 (Right) - Applies tension to the camshaft timing chain - Hamburg Tech - Audi Volkswagen

Applies tension to the camshaft timing chain We Price Match - Give Us A Call or Chat!

Brand:
Hamburg Tech - Corporate Logo
ES#:
3082198
Mfg#:
078109088H
Ships in 1 Business Day
$195.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Brake Reservoir Cap

ES#4716596 - 5Q0611349E - Brake Reservoir Cap - Clean up your engine bay with a new cap - Genuine Volkswagen Audi - Audi Volkswagen

Clean up your engine bay with a new cap

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4716596
Mfg#:
5Q0611349E
In Stock
13% off MSRP

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

$15.99

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

$13.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Hex Socket Head Bolt - Priced Each

ES#470819 - N90808201 - Hex Socket Head Bolt - Priced Each - Replace the bolts that you've lost. 6x18.5 - Genuine Volkswagen Audi - Audi Volkswagen

Replace the bolts that you've lost. 6x18.5

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
470819
Mfg#:
N90808201
In Stock
$2.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Turbo Hose Clamp Kit

ES#2766010 - 5574k19KT - Turbo Hose Clamp Kit - Includes all of the clamps for the turbo system hoses - ECS - Audi

Includes all of the clamps for the turbo system hoses 10X Entries Into Our F80 M3 Sweepstakes

Brand:
ECS - Corporate Logo
ES#:
2766010
Mfg#:
5574K19KT
In Stock
ON SALE! SAVE 25%
$86.99

This product was last offered at the strikethrough price on
06-13-2026

$65.24 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.

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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