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Audi S4 Most Popular Parts

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ES#3199717 - 034-401-1045 - Full Density Line Front Control Arm Kit - Includes new control arms with Density Line control arm bushings, ball joints, and hardware - 034Motorsport - Audi

Includes new control arms with Density Line control arm bushings, ball joints, and hardware affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Fits models from production date 11/3/2009 (M14 Ball Joints) - Please verify existing prior to ordering

Brand:
034Motorsport - Corporate Logo
ES#:
3199717
Mfg#:
034-401-1045
In Stock
$964.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3478463 - 025412ECS01 - Adjustable Damping Performance Coilover System - Audi B8/B8.5 - Take control of your ride while going low with our sport-tuned coilover system! - ECS - Audi

Take control of your ride while going low with our sport-tuned coilover system! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Vehicles equipped with Electronic Damping Control (EDC) will lose shock dampening and receive a system error code with coilover systems.

Brand:
ECS - Corporate Logo
ES#:
3478463
Mfg#:
025412ECS01
In Stock
ON SALE! SAVE 41%
$1154.99

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

$679.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4376068 - 012616la01KT - B8 S4/S5/Q5 3.0T Downpipes With Integrated X-Pipe - Change the tone of your 3.0T exhaust with easy-to-install downpipes that mate to your factory cat-back exhaust. - ECS - Audi

Change the tone of your 3.0T exhaust with easy-to-install downpipes that mate to your factory cat-back exhaust. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
4376068
Mfg#:
012616LA01KT
In Stock
ON SALE! SAVE 25%
$599.99

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

$449.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3604824 - 20236KT - Liqui Moly Top Tec - Oil Service Kit (0w-20) - Includes LiquiMoly Top Tec 6200 508.00/509.00 0W20 oil, Hengst Filter, drain plug, and washer for a complete oil service - Assembled By ECS - Audi

Includes LiquiMoly Top Tec 6200 508.00/509.00 0W20 oil, Hengst Filter, drain plug, and washer for a complete oil service affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3604824
Mfg#:
20236KT
In Stock
ON SALE!
$122.77

This product was last offered at the strikethrough price on
03-09-2026

$116.10 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement
ES#3418639 - 2331kt2 - Oil Service Kit - Premium  - Includes Hengst oil filter, drain plug/washer, and 7 liters of Liqui Moly Leichtlauf High Tech Engine Oil (5w-40) oil - Assembled By ECS - Audi
ECS Tuning recommends this product.

Includes Hengst oil filter, drain plug/washer, and 7 liters of Liqui Moly Leichtlauf High Tech Engine Oil (5w-40) oil affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3418639
Mfg#:
2331KT2
In Stock
ON SALE!
$91.99

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

$90.97 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement
ES#4147363 - 028807ecs01KT - Audi B8.5 S4 / A4 S-Line Rear Diffuser - Gloss Black - Add some aggressive styling to your Audi! - ECS - Audi

Add some aggressive styling to your Audi! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Fits facelift B8.5 (2013+) models only

Brand:
ECS - Corporate Logo
ES#:
4147363
Mfg#:
028807ECS01KT
In Stock
ON SALE! SAVE 25%
$399.99

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

$299.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3439033 - molygenKT6 - Liqui Moly MolyGen - Premium Oil Service Kit - Includes Hengst oil filter and Liqui Moly 5w-40 oil with MolyGen technology - Assembled By ECS - Audi

Includes Hengst oil filter and Liqui Moly 5w-40 oil with MolyGen technology affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
3439033
Mfg#:
MOLYGENKT6
In Stock
ON SALE! SAVE 21%
$111.99

This product was last offered at the strikethrough price on
05-15-2026

$88.30 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement
ES#4674750 - 06E906036ALKT - Fuel Injectors - Set Of Six - Includes all 6 injectors with injector inserts - Assembled By ECS - Audi

Includes all 6 injectors with injector inserts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4674750
Mfg#:
06E906036ALKT
Back Ordered
Auto Notify
ON SALE! SAVE 26%
$1817.99

This product was last offered at the strikethrough price on
02-09-2026

$1338.24 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#4017702 - CTS-IT-300R -  CTS Turbo Air Intake System - True 3.5" Velocity Stack - NEW UPDATED DESIGN! True 3.5 intake for maximum airflow - 3.5" mandrel bent piping with huge 6 velocity stack air filter! - CTS - Audi

NEW UPDATED DESIGN! True 3.5″ intake for maximum airflow - 3.5" mandrel bent piping with huge 6″ velocity stack air filter! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
4017702
Mfg#:
CTS-IT-300R
In Stock
$329.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#3551610 - 0B5325330AKT3 - Complete DSG Automatic Transmission Service Kit  - Includes a new DSG trans filter, DSG cooling filter, fluid, gaskets, transmission pan bolts, and plugs to service your transmission - Assembled By ECS - Audi
ECS Tuning recommends this product.

Includes a new DSG trans filter, DSG cooling filter, fluid, gaskets, transmission pan bolts, and plugs to service your transmission affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Fits from the 2011 model year (2010 model year has cooling filter built-in to cooling line)

Brand:
Assembled By ECS - Corporate Logo
ES#:
3551610
Mfg#:
0B5325330AKT3
Ships on Aug 14, 2026
Auto Notify
ON SALE!
$297.99

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

$271.50 USD
Free Shipping
This product is lifetime replacement eligible Partial Replacement
ES#2992194 - 034-509-0050KT - Track/Street Density Line Motor Mount Kit - Pair - Void-free and fluid-free, eliminating the slop associated with the factory mounts - 034Motorsport - Audi

Void-free and fluid-free, eliminating the slop associated with the factory mounts affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
2992194
Mfg#:
034-509-0050KT
In Stock
$528.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement
ES#2748468 - 06E905115E - Ignition Coil - Priced Each - Keep your engine running smooth - NFIS Original Equipment - Audi Volkswagen

Keep your engine running smooth affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
NFIS Original Equipment - Corporate Logo
ES#:
2748468
Mfg#:
06E905115E
In Stock
$31.99 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4030590 - MS100192 - APR Upgraded Ignition Coil - Red - Priced Each  - Designed to be a direct plug-and-play upgrade to factory coils, providing greater energy output, ensuring a stronger and more consistent spark! - APR - Audi Volkswagen Porsche

Designed to be a direct plug-and-play upgrade to factory coils, providing greater energy output, ensuring a stronger and more consistent spark! Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!
CARB certified for sale in all 50 states

Brand:
APR - Corporate Logo
ES#:
4030590
Mfg#:
MS100192
EO#:
D-783-5
In Stock
12% off MSRP

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

$57.95

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

$51.19 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4620046 - 06E905115GKT17 - Performance Ignition Service Kit - Includes six ECS Performance red coil packs and six NGK Iridium spark plugs - Assembled By ECS - Audi

Includes six ECS Performance red coil packs and six NGK Iridium spark plugs affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4620046
Mfg#:
06E905115GKT17
Ships on Aug 4, 2026
Auto Notify
ON SALE! SAVE 15%
$250.99

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

$213.02 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement
ES#4781710 - 06m198405f62KT - Oil Service Kit - Includes Liquimoly Molygen High Performance Engine Oil (5w-40), Filter, drain plug, and washer for a complete oil service - Assembled By ECS - Audi

Includes Liquimoly Molygen High Performance Engine Oil (5w-40), Filter, drain plug, and washer for a complete oil service affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Assembled By ECS - Corporate Logo
ES#:
4781710
Mfg#:
06M198405F62KT
In Stock
ON SALE! SAVE 18%
$128.99

This product was last offered at the strikethrough price on
05-15-2026

$105.65 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Partial Replacement
ES#4376580 - MS100208 - APR Upgraded Ignition Coil - Red - Priced Each - Designed to be a direct plug-and-play upgrade to factory coils, providing greater energy output, ensuring a stronger and more consistent spark! - APR - Audi Volkswagen Porsche

Designed to be a direct plug-and-play upgrade to factory coils, providing greater energy output, ensuring a stronger and more consistent spark! Call In Or Chat For Best Price! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 5X Entries For Our 25th Anniversary Sweepstakes!

Brand:
APR - Corporate Logo
ES#:
4376580
Mfg#:
MS100208
In Stock
11% off MSRP

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

$40.30

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

$35.82 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

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