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Audi S4 Engine Parts & Accessories

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ES#3441469 - 8W0121081DS - Coolant Overflow Hose / Breather Line - Restore cooling system integrity and prevent pressure loss or coolant leaks with this direct-replacement genuine OEM coolant breather hose. - Genuine Volkswagen Audi - Audi

Restore cooling system integrity and prevent pressure loss or coolant leaks with this direct-replacement genuine OEM coolant breather hose.

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
3441469
Mfg#:
8W0121081DS
Ships in 2 Business Days
13% off MSRP

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

$86.99

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

$75.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#281265 - 06F903193A -  Alternator Protective Cap - Protects the voltage regulator - Genuine Volkswagen Audi - Audi Volkswagen

Protects the voltage regulator For Bosch style alternator

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
281265
Mfg#:
06F903193A
Ships in 4 Business Days
13% off MSRP

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

$86.99

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

$75.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Minimize the movement of the diff under acceleration.

Brand:
Powerflex - Corporate Logo
ES#:
4869769
Mfg#:
PFF3-221BLK
Ships in 1 Business Day
$37.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2707805 - 034198025F - Valve Cover Gasket - Set - Stop Slow Oil Leaks - Victor Reinz - Audi

Stop Slow Oil Leaks

Brand:
Victor Reinz - Corporate Logo
ES#:
2707805
Mfg#:
034198025F
Ships in 1-2 days
$38.99

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

$37.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4220586 - 8E0121321 - Expansion Tank Cap - Plastic pressure cap for expansion tank - Rein - Audi

Plastic pressure cap for expansion tank 2X Entries Into Our F80 M3 Sweepstakes
We Price Match - Give Us A Call or Chat!

Brand:
Rein - Corporate Logo
ES#:
4220586
Mfg#:
8E0121321
In Stock at Vendor
$18.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2871337 - 4A0805121A - Plastic Dowel Pin - Priced Each - Secures the belly pan to the fender liners - Febi - Audi

Secures the belly pan to the fender liners We Price Match - Give Us A Call or Chat!

Brand:
Febi - Corporate Logo
ES#:
2871337
Mfg#:
4A0805121A
In Stock
Limited Qty Sale
$2.13

This product was last offered at the strikethrough price on
08-24-2026

$1.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#466664 - N0174052 - Negative Terminal Bolt - Used to secure the negative battery clamp to the terminal - Genuine Volkswagen Audi - Audi Volkswagen

Used to secure the negative battery clamp to the terminal

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
466664
Mfg#:
N0174052
Ships on Nov 17, 2026
17% off MSRP

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

$17.99

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

$14.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3691587 - 077906037aktKT6 - Fuel Injector Installation Kit  - A complete set of o-rings and clips for installing new injectors - Assembled By ECS - Audi

A complete set of o-rings and clips for installing new injectors 10X Entries Into Our F80 M3 Sweepstakes

Brand:
Assembled By ECS - Corporate Logo
ES#:
3691587
Mfg#:
077906037AKTKT6
Back Ordered
ON SALE!
$74.81 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#280414 - 06D109611H - Exhaust Valve - Priced Each - A sodium filled valve - Genuine Volkswagen Audi - Audi Volkswagen

A sodium filled valve

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
280414
Mfg#:
06D109611H
In Stock
ON SALE!
$80.99

This product was last offered at the strikethrough price on
07-15-2026

$74.27 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#5457024 - 06M109229AA - Timing Chain - Left - Stop stretched out chains from creating noise - Iwis - Audi

Stop stretched out chains from creating noise Fits up to production date 4/16/2018

Brand:
Iwis - Corporate Logo
ES#:
5457024
Mfg#:
06M109229AA
In Stock
Limited Qty Sale
$86.99

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

$73.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4001235 - fgr7dqe0-8 - Spark Plugs - Set Of Eight (Nickel) - Keep your motor running smoothly with a set of new spark plugs - Bosch - Audi BMW

Keep your motor running smoothly with a set of new spark plugs We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
4001235
Mfg#:
FGR7DQE0-8
Ships in 1 Business Day
$73.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4040463 - 06E103153E - Front Crankshaft Seal With Flange - Stop oil leaks and prevent internal engine damage - Victor Reinz - Audi

Stop oil leaks and prevent internal engine damage

Brand:
Victor Reinz - Corporate Logo
ES#:
4040463
Mfg#:
06E103153E
Ships in 1-2 days
$75.99

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

$73.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#2589797 - 8K0121261H - Auxiliary Water Pump Bracket - Front location bracket used to secure the auxiliary water pump - Genuine Volkswagen Audi - Audi

Front location bracket used to secure the auxiliary water pump

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2589797
Mfg#:
8K0121261H
Ships in 4 Business Days
13% off MSRP

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

$84.99

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

$73.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#1367 - S4S6THCK - Heavy Duty Hose Clamp Kit - Fits ECS/Samco Hose that goes from the turbo to the cross-over pipe - Samco - Audi

Fits ECS/Samco Hose that goes from the turbo to the cross-over pipe

Brand:
Samco - Corporate Logo
ES#:
1367
Mfg#:
S4S6THCK
In Stock
$36.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#5261 - n90921901 - Mass Air Flow Sensor Gasket - Creates an air tight seal between the MAF and the air cleaner - Genuine Volkswagen Audi - Audi

Creates an air tight seal between the MAF and the air cleaner

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
5261
Mfg#:
N90921901
Ships in 3 Business Days
16% off MSRP

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

$43.99

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

$36.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#450433 - 8K0201933M - Vacuum Control Line - Keep your vacuum system in check - Genuine Volkswagen Audi - Audi

Keep your vacuum system in check

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
450433
Mfg#:
8K0201933M
Back Ordered
14% off MSRP

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

$42.99

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

$36.99 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.

Let us help you find the parts that fit your Audi

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