QUATTRO MEETS PRACTICALITY

B5 through B9 — Audi's compact sedan with available Quattro AWD and turbo power.

Audi A4 HERITAGE

THE QUATTRO COMPACT

The Audi A4 has been the German compact sport sedan since 1994. The B5 (1.8T) launched the tuner-friendly chassis, the B6/B7 added the K04 turbo upgrade culture, and the B8/B9 brought EA888 turbocharged 2.0T engines that share parts with the VW Golf R / Jetta GLI.

MOTORMIA A4 builds span B5 1.8T stage-3 tuners, B7 RS4 V8 swap projects, B8/B9 ECU-tuned dailies, and the S4 supercharged V6 generation. Many parts cross-fit with VW MK6/MK7 platforms.

Audi A4 ON MOTORMIA

THE NUMBERS

3,135
Parts that fit
3,000+
MOTORMIA Builds
EBC
#1 brand by SKUs
$711
Average MSRP

READY TO BUILD YOUR AUDI A4?

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Verified Fitment

Audi A4 Category air and fuel Parts

502 parts available

Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

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DELPHI auto part

DELPHI

OXYGEN SENSOR

DELPHI auto part

DELPHI

OXYGEN SENSOR

C

CARTER

DIRECT INJECTION FUEL PUMP

DELPHI auto part

DELPHI

MAF SENSOR - PROBE ONLY

DELPHI auto part

DELPHI

OXYGEN SENSOR

STANDARD IGN auto part

STANDARD IGN

MASS AIR FLOW

STANDARD IGN auto part

STANDARD IGN

INJECTOR

C

CARTER

AUDI A4 2017-2019

DELPHI fuel pump

DELPHI

FUEL PUMP MODULE ASSEM

DELPHI auto part

DELPHI

MASS AIR FLOW SENSOR-PROBE ONLY

DELPHI auto part

DELPHI

MAF SENSOR - PROBE ONLY

DELPHI auto part

DELPHI

OXYGEN SENSOR

A1 REMFG INC auto part

A1 REMFG INC

IMPORT ECC

A

A1 REMFG INC

NEW TURBOCHARGERS

Samco auto part

Samco

Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (WHITE)

S

Samco

Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (NINJAGREENCAMO)

TYC auto part

TYC

0509 AD A.4 QATRO 2.0/3.2L FUEL MODULE

Garrett Turbos auto part

Garrett Turbos

TURBOCHARGER SERV

Garrett Turbos auto part

Garrett Turbos

TURBOCHARGER ORIGINAL REMAN GTA2052V VW GROUP

A

A1 REMFG INC

MASS AIR FLOW

A1 REMFG INC auto part

A1 REMFG INC

MASS AIRFLOW SENSOR

A

A1 REMFG INC

MASS AIRFLOW SENSOR

A1 REMFG INC auto part

A1 REMFG INC

MASS AIRFLOW SENSORS

A

A1 REMFG INC

MASS AIRFLOW SENSORS

TYC intercooler

TYC

INTERCOOLER ASSY 2.0L; SDN; W/O ULTRA ENG AUDI A4 1721; WGN AUDI A4 ALLROAD 1721; A5 QUATTRO 1821

S

Samco

Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (RED)

T

TYC

INTERCOOLER ASSY 2.0L AUDI A5 QUATTRO 1017; A4 0916; Q5 1117 ALLROAD 1316; A6 1215

S

Samco

Samco Volswagen Passat 1.8T B5.5 AUG US Spec (4) Turbo Kit (BLUE)

Samco auto part

Samco

Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (BRG)

S

Samco

Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (LIGHTNINGBLUECAMO)

Samco auto part

Samco

Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (GREEN)

S

Samco

Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (BLUE)

S

Samco

Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (BLACK)

T

Trans-Dapt

OLDS AND PONTIAC ENGINE KIT; OFFSET PCV; OLDS 330455 AND PONTIAC 403CHROME195964 PONTIAC ENGINES

S

Samco

Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (BLACK)

S

Samco

Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (SOLARORANGECAMO)

S

Samco

Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (URBANCAMO)

S

Samco

Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (BLAZE)

Samco auto part

Samco

Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (BLAZE)

S

Samco

Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (SOLARORANGECAMO)

Garrett Turbos auto part

Garrett Turbos

TURBOCHARGER ORIGINAL REMAN WITH KIT GT2052V VW GROUP

S

Samco

Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (RED)

Samco auto part

Samco

Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (URBANCAMO)

Samco gunmetal auto part

Samco

Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (GUNMETALGREY)

Samco blue auto part

Samco

Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (BLUE)

A

A1 REMFG INC

TURBO CHARGERS

S

Samco

Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (YELLOW)

Samco gunmetal auto part

Samco

Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (GUNMETALGREY)

Samco auto part

Samco

Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (URBANCAMO)

Dorman throttle body

Dorman

THROTTLE BODY UNIT

Dorman auto part

Dorman

SECONDARY AIR INJECTION CHECK VALVE

Dorman auto part

Dorman

COMBINATION VALVE

TURBOCHARGER COOLANT FEED LINE

Dorman

TURBOCHARGER COOLANT FEED LINE

TURBO LINE

Dorman

TURBO LINE

Dorman auto part

Dorman

TURBOCHARGER

BOOST SOLENOID

Dorman

BOOST SOLENOID

Denso auto part

Denso

AIR/FUEL SENSOR

Dorman auto part

Dorman

AIR CHECK VALVE

Dorman throttle body

Dorman

THROTTLE BODY UNIT

WIX air filter

WIX

AIR FILTER MIN ORDER QTY1

FAQ

Frequently Asked Questions About the Audi A4

What are the best aftermarket parts brands for the Audi A4?

The top brands MOTORMIA owners trust for Audi A4 builds are EBC, PowerStop, H&R, Bilstein, and Magnaflow. The catalog carries 3,135 parts that fit the A4. Use the fitment selector to filter to your specific year and trim, then browse by category or brand.

What's the best trim or sub-model of the Audi A4 to modify?

The most-modified A4 trims are S4 (especially B5 / B7 / B8 / B9 supercharged). These trims typically came with performance-focused suspension, brakes, and engine options that give a higher starting point. That said, the A4's engine family (1.8T, 2.0T EA888, 3.0T supercharged (S4), 4.2 V8 (B7 RS4)) shares aftermarket across most trims, so base-trim builds with the right bolt-ons can match higher trims on power.

What's the typical mod path for a Audi A4?

For most Audi A4 builds, the recommended modification order is: ECU tune → intake → downpipe → suspension → turbo upgrade. This sequence stages upgrades so each mod supports the next — tuning unlocks gains from intake/exhaust, suspension keeps the added power planted. MOTORMIA member builds let you see exact part lists for Audi A4 builds at every power level.

How does the Audi A4 aftermarket compare to the BMW 3 Series?

The Audi A4 is the Quattro AWD compact sedan with the EA888 2.0T platform shared across Audi/VW. On MOTORMIA, 3,135 parts fit the A4 across 3,000+ active member builds, with an average part MSRP of $711. The decision usually comes down to which platform you own — both have full bolt-on catalogs.

Will any Audi A4 part fit my year and trim?

Not always. The Audi A4 has had multiple generations and engine changes (e.g., 1.8T, 2.0T EA888, 3.0T supercharged (S4), 4.2 V8 (B7 RS4)), and parts are generation- and trim-specific. MOTORMIA's catalog uses verified fitment data — every product page shows exactly which years and submodels of the A4 a part fits. Use the fitment selector at the top of any page to pre-filter to your build.

Does MOTORMIA offer returns on Audi A4 parts?

Yes. Most Audi A4 parts on MOTORMIA are eligible for our 30-day return policy provided they're unused, uninstalled, and in original packaging. Special-order parts are flagged with a "Special Order" badge on the product page. Manufacturer warranties are processed through MOTORMIA on your behalf.

MOTORMIA APP

Build your Audi A4 with Mia

Personalized Audi A4 mod recommendations, verified fitment from real A4 owners, and a garage that tracks every part on your build.

  • Mod recommendations tuned to your A4 year, trim, and submodel
  • Verified fitment data from 3,000+ Audi A4 member builds
  • Performance gain estimates based on real-world results
  • Save your garage and track every part you've installed