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Audi A4 Most Popular Parts

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AWE ColdFront Intercooler - Audi B9 S4/S5 3.0T

ES#4044047 - 4510-11060 - AWE ColdFront Intercooler - Audi B9 S4/S5 3.0T - Offers a 130% increase in frontal surface area and a massive 83% increase in volume over the factory B9 intercooler - AWE - Audi

Offers a 130% increase in frontal surface area and a massive 83% increase in volume over the factory B9 intercooler affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
AWE - Corporate Logo
ES#:
4044047
Mfg#:
4510-11060
Ships in 8 Business Days
$945.00 USD
This product is lifetime replacement eligible Lifetime Replacement

Magnetic Oil Drain Plug - With 10 Aluminum Washers

ES#3187654 - 001196ECS01-02 - Magnetic Oil Drain Plug - With 10 Aluminum Washers - Capture harmful particles to prevent wear. M14x1.5 - ECS - Audi Volkswagen MINI Porsche

Capture harmful particles to prevent wear. M14x1.5 affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
3187654
Mfg#:
001196ECS01-02
In Stock
ON SALE! SAVE 25%
$29.99

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

$22.49 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Luft-Technik B9 A4 Intercooler And Charge Pipe Kit

ES#3557444 - 019219ecs01aKT2 - Luft-Technik B9 A4 Intercooler And Charge Pipe Kit - Full kit to upgrade your charge pipes and FMIC - ECS - Audi

Full kit to upgrade your charge pipes and FMIC affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

For vehicles with production date up through 2020

Brand:
ECS - Corporate Logo
ES#:
3557444
Mfg#:
019219ECS01AKT2
Ships on Sep 23, 2026
Auto Notify
ON SALE! SAVE 23%
$1039.99

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

$799.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Solid Rear Sway Bar - 25.4mm

ES#2996586 - 034-402-1005 - Solid Rear Sway Bar - 25.4mm - Substantially reduce understeer and body roll - 034Motorsport - Audi

Substantially reduce understeer and body roll affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
2996586
Mfg#:
034-402-1005
In Stock
$355.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Rear Oxygen Sensor - Priced Each

ES#1893854 - 1K0998262T - Rear Oxygen Sensor - Priced Each - Keep your engine running efficiently - Bosch - Audi Volkswagen

Keep your engine running efficiently affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
We Price Match - Give Us A Call or Chat!

Brand:
Bosch - Corporate Logo
ES#:
1893854
Mfg#:
1K0998262T
In Stock
$172.99

This product was last offered at the strikethrough price on
04-06-2026

$120.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

18" Style 349 Wheels - Set Of Four

ES#2598320 - 349AKT - 18" Style 349 Wheels - Set Of Four - 18x8 ET45 5x112 57.1CB - Silver - Alzor - Audi Volkswagen

18x8 ET45 5x112 57.1CB - Silver affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
Alzor - Corporate Logo
ES#:
2598320
Mfg#:
349AKT
Ships on Aug 5, 2026
Auto Notify
ON SALE! SAVE 25%
$1176.99

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

$882.51 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Carbon Fiber Front Lip Spoiler - Audi B8.5 A4/S4

ES#3046047 - 013875ECS01A - Carbon Fiber Front Lip Spoiler - Audi B8.5 A4/S4 - Hand-laid carbon fiber to upgrade your exterior styling - ECS - Audi

Hand-laid carbon fiber to upgrade your exterior styling affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

For S-Line models from the 2013 model year (Facelift)

Brand:
ECS - Corporate Logo
ES#:
3046047
Mfg#:
013875ECS01A
In Stock
ON SALE! SAVE 15%
$979.99

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

$832.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Kohlefaser Luft-Technik intake System - Audi B8 A4/A5 2.0T

ES#2785229 - 000928ECS01 - Kohlefaser Luft-Technik intake System - Audi B8 A4/A5 2.0T - Engineered for dyno proven performance and show quality looks! - ECS - Audi

Engineered for dyno proven performance and show quality looks! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!

Brand:
ECS - Corporate Logo
ES#:
2785229
Mfg#:
000928ECS01
Ships on Jul 1, 2026
ON SALE! SAVE 20%
$705.99

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

$564.15 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

B8/B8.5 A4/S4 Lowering Spring Set

ES#4620230 - 047330LA01 - B8/B8.5 A4/S4 Lowering Spring Set - Dramatically improve looks and handling with and average lowering up to 1.6" front and rear. - ECS - Audi

Dramatically improve looks and handling with and average lowering up to 1.6" front and rear. affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms 10X Entries For Our 25th Anniversary Sweepstakes!
Manufactured 100% in the USA

Brand:
ECS - Corporate Logo
ES#:
4620230
Mfg#:
047330LA01
In Stock
ON SALE!
$285.99

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

$276.74 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Density Line Lower Control Arms

ES#4505755 - 034-401-1069 - Density Line Lower Control Arms - Replace your aging factory fluid-filled bushings with Density Line 65 durometer bushings in this comprehensive control arm kit - 034Motorsport - Audi

Replace your aging factory fluid-filled bushings with Density Line 65 durometer bushings in this comprehensive control arm kit affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
4505755
Mfg#:
034-401-1069
In Stock
$657.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Turbo Muffler Delete

ES#3022523 - CTSHW0199 - Turbo Muffler Delete - Replace the factory turbo muffler with a straight, uninterrupted billet aluminum delete - CTS - Audi Volkswagen

Replace the factory turbo muffler with a straight, uninterrupted billet aluminum delete affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
CTS - Corporate Logo
ES#:
3022523
Mfg#:
CTSHW0199
Ships in 8 Business Days
$79.99 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

BMS Pedal Tuner

ES#3998870 - BPT-VA1 - BMS Pedal Tuner - Don't let weak and unresponsive factory gas pedal mapping ruin your driving experience! - Burger Motorsports - Audi Volkswagen

Don't let weak and unresponsive factory gas pedal mapping ruin your driving experience! affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
Burger Motorsports - Corporate Logo
ES#:
3998870
Mfg#:
BPT-VA1
In Stock
$199.00 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

RS Red Top Performance Ignition Service Kit

ES#4158733 - 06H905110LKT5 - RS Red Top Performance Ignition Service Kit - Add 8V RS3/B9 S4 spark with these red top coil packs and Brisk Silver Racing ER12s plugs, ensuring a stronger and more consistent spark! - Assembled By ECS - Audi Volkswagen

Add 8V RS3/B9 S4 spark with these red top coil packs and Brisk Silver Racing ER12s plugs, ensuring a stronger and more consistent spark! 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#:
4158733
Mfg#:
06H905110LKT5
In Stock
ON SALE!
$206.04 USD
Free Shipping
on orders $49 and up
This product is lifetime replacement eligible Lifetime Replacement

Dynamic+ Sway Bar Kit

ES#3468733 - 034-402-1012 - Dynamic+ Sway Bar Kit - Features perfectly matched front & rear sway bars to further reduce body roll and enhance steering feel - 034Motorsport - Audi

Features perfectly matched front & rear sway bars to further reduce body roll and enhance steering feel affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

Brand:
034Motorsport - Corporate Logo
ES#:
3468733
Mfg#:
034-402-1012
In Stock
$711.00 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

APR Iridium Pro Spark Plug - Priced Each

ES#4616174 - Z1003100 - APR Iridium Pro Spark Plug - Priced Each - An excellent upgrade for tuned engines. 14X26.5X16mm - Heat Range 9 - APR - Audi Volkswagen Porsche

An excellent upgrade for tuned engines. 14X26.5X16mm - Heat Range 9 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#:
4616174
Mfg#:
Z1003100
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.

$34.54

This product was last offered at the strikethrough price on
06-04-2026

$30.70 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

Cup Kit/Coilover Installation Kit

ES#2581959 - 4F0513353DKT - Cup Kit/Coilover Installation Kit - Includes shock/strut mounts, spring pads, and hardware - Assembled By ECS - Audi

Includes shock/strut mounts, spring pads, and hardware 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#:
2581959
Mfg#:
4F0513353DKT
Ships Today
ON SALE! SAVE 10%
$336.99

This product was last offered at the strikethrough price on
04-20-2026

$304.06 USD
Free Shipping
This product is lifetime replacement eligible Lifetime Replacement

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