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Audi S4 Most Popular Parts

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ES#3612126 - FMDV13A - Atmospheric Dump Valve - Black - Prevent boost leaks with full billet construction - Forge - Audi

Prevent boost leaks with full billet construction affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Forge - Corporate Logo
ES#:
3612126
Mfg#:
FMDV13A
In Stock
$349.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Designed for high-powered street cars while capable enough to handle the track. Conservatively rated at 600ft/lbs. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
South Bend Clutch - Corporate Logo
ES#:
3698205
Mfg#:
K70619F-SS-O
Ships in 1 Business Day
$3841.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4623255 - 06E103547AB - Oil Separator/Pressure Control Valve (PCV) - Located beneath the supercharger compressor - URO - Audi

Located beneath the supercharger compressor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Fits from the 2013 model year

Brand:
URO - Corporate Logo
ES#:
4623255
Mfg#:
06E103547AB
In Stock
$127.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3419179 - 038906051J - MAP Sensor - Priced Each - Manifold absolute pressure sensor - Bosch - Audi

Manifold absolute pressure sensor affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!
Located on the front left & right of the supercharger

Brand:
Bosch - Corporate Logo
ES#:
3419179
Mfg#:
038906051J
In Stock
$61.99

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

$39.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4056874 - 352100BJ - KW V3 Series Coilover Kit - The ultimate in coilover technology, featuring double adjustable damping - KW Suspension - Audi

The ultimate in coilover technology, featuring double adjustable damping affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For sedan models with Electronic Damping Control. Range of lowering is 0.4-1.4" front and rear.

Brand:
KW Suspension - Corporate Logo
ES#:
4056874
Mfg#:
352100BJ
Ships in 6 Business Days
$3834.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3974236 - 024713ecs01KT - Audi B8 A4/S4 Pre-Facelift Carbon Fiber Radiator Support Cover - Carbon fiber, front and center! - ECS - Audi

Carbon fiber, front and center! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits pre-facelift models up to 2013

Brand:
ECS - Corporate Logo
ES#:
3974236
Mfg#:
024713ECS01KT
In Stock
ON SALE! SAVE 10%
$425.99

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

$383.39 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Includes a $455 Refundable Core Charge affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits vehicles from 1/20/2014 with electric power steering.

Brand:
Atlantic Automotive Engineering - Corporate Logo
ES#:
4840022
Mfg#:
8K1423055CGKT
In Stock at Vendor
$3895.99

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

$3825.99 USD
This product is lifetime replacement eligible Partial Replacement
ES#2773325 - 8K5927156J - Mechatronic Control Unit - Brand new mechatronics unit to replace your faulty unit - Genuine Volkswagen Audi - Audi

Brand new mechatronics unit to replace your faulty unit affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For S-Tronic (DSG) transmissions with code LHK, LJD, MNL, or NWF - Please check with VIN prior to ordering

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2773325
Mfg#:
8K5927156J
Special Order: No Guaranteed ETA
4% off MSRP

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

$3994.99

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

$3824.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2772347 - 8K5927156H - Mechatronic Unit With Software - New mechatronics unit to replace your faulty unit - Controls S-Tronic shifting characteristics - Genuine Volkswagen Audi - Audi

New mechatronics unit to replace your faulty unit - Controls S-Tronic shifting characteristics affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For S-Tronic (DSG) transmissions with code LJD, LHK, MNL, NWF, or PDN - Please check with VIN prior to ordering

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
2772347
Mfg#:
8K5927156H
Special Order: No Guaranteed ETA
4% off MSRP

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

$3994.99

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

$3824.99 USD
This product is lifetime replacement eligible Lifetime Replacement
ES#4429104 - 06M906036AM - Fuel Injector- Priced Each - Replace your old and failing injectors - Genuine Volkswagen Audi - Audi

Replace your old and failing injectors affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
For vehicles with production date up to 06/15/2020

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
4429104
Mfg#:
06M906036AM
Ships in 2 Business Days
9% off MSRP

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

$278.99

This product was last offered at the strikethrough price on
02-17-2026

$254.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#1928557 - 06E903341G - Accessory Belt Idler Pulley - Also referred to as the 'relay roller' - Genuine Volkswagen Audi - Audi

Also referred to as the 'relay roller' affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
1928557
Mfg#:
06E903341G
In Stock
15% off MSRP

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

$100.00

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

$84.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3740044 - 028798ECS01 - Audi B9 S4/S5 ECU Cover - Matte Black - Compliment your engine bay and hide away the exposed ECU - ECS - Audi

Compliment your engine bay and hide away the exposed ECU affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3740044
Mfg#:
028798ECS01
In Stock
ON SALE! SAVE 25%
$103.99

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

$77.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3991502 - 8K0819439BBF - Bluecare Cabin Filter / Fresh Air Filter - The activated charcoal filters odor from reaching the cabin - Hengst - Audi Porsche
ECS Tuning recommends this product.

The activated charcoal filters odor from reaching the cabin affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
We Price Match - Give Us A Call or Chat! Hengst is our preferred OEM filtration supplier!

Brand:
Hengst - Corporate Logo
ES#:
3991502
Mfg#:
8K0819439BBF
In Stock
$34.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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

Brand:
ECS - Corporate Logo
ES#:
4620282
Mfg#:
4616139PDKGOZLMZ
In Stock
ON SALE! SAVE 24%
$355.99

This product was last offered at the strikethrough price on
01-03-2026

$272.33 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#472734 - WHT002557 - Self-Locking Nut - Priced Each - Install new hardware with your new parts. M12x1.5 - Genuine Volkswagen Audi - Audi

Install new hardware with your new parts. M12x1.5 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Used in securing the rear control arms, used in multiple locations

Brand:
Genuine Volkswagen Audi - Corporate Logo
ES#:
472734
Mfg#:
WHT002557
In Stock
3% off MSRP

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

$6.19

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

$6.01 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#3603968 - 034-401-1063 - Density Line Adjustable Upper Control Arm Kit (Track Spec) - Gain additional negative camber for increased cornering grip and improved handling performance - 034Motorsport - Audi Volkswagen

Gain additional negative camber for increased cornering grip and improved handling performance affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3603968
Mfg#:
034-401-1063
In Stock
$635.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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