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?

Pick your year and trim to shop verified-fit Audi A4 parts.

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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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30-Day Returns
Victor Reinz intake system

Victor Reinz

MAHLE Original Audi A3 13-06 Intake Manifold Gasket

Victor Reinz throttle body

Victor Reinz

MAHLE Original Audi A4 08-06 Throttle Body Gasket

Victor Reinz throttle body

Victor Reinz

MAHLE Original Audi A4 03-97 Throttle Body Gasket

Go Fast Bits auto part

Go Fast Bits

Pulley Kit Lightweight Underdrive 300ZX

Turbosmart auto part

Turbosmart

Turbosmart 15-21 Volkswagen GTI/Golf R MK7 BOV Kompact EM Dual Port

Go Fast Bits auto part

Go Fast Bits

GFB 02-10 WRX/STI 2 Piece Under-Drive Pulley Kit w/ Belts (Crank & Alternator)

DeatschWerks auto part

DeatschWerks

DeatschWerks 01-06 Audi A4/TT / VW Golf GTI 650cc Injectors

Nitrous Express auto part

Nitrous Express

Nitrous Express - ALL SPORT COMPACT EFI SINGLE NOZZLE SYSTEM (35-50-75 HP) WITH 5LB BOTTLE - 20923-05

DeatschWerks auto part

DeatschWerks

DeatschWerks 01-06 Audi A4/TT / VW Golf GTI 440cc Injectors

Nitrous Express auto part

Nitrous Express

Nitrous Express - SPORT COMPACT EFI DUAL STAGE (35-75) X 2 WITH 15LB BOTTLE - 20927-15

K&N Engineering air filter

K&N Engineering

K&N 16-18 Audi A5 L4-2.0L Diesel Engine Replacement Air Filter

aFe intake system

aFe

aFe MagnumFORCE Intakes Stage-2 PDS AIS PDS Audi A4 02-05 L4-1.8L (t)

Go Fast Bits auto part

Go Fast Bits

GFB Diverter Valve ATMO DV+ 2.0T FSI & TSI VAG Applications (Direct Replacement)

DeatschWerks auto part

DeatschWerks

DeatschWerks 01-06 Audi A4/TT / 00-06 Volkswagen Golf GTI Bosch EV14 1500cc Injectors (Set of 4)

Nitrous Express auto part

Nitrous Express

Nitrous Express - ALL SPORT COMPACT EFI SINGLE NOZZLE SYSTEM (35-50-75 HP) LESS BOTTLE - 20923-00

Go Fast Bits auto part

Go Fast Bits

GFB Deceptor Pro II Blow Off Valve - 25mm Inlet/25mm Outlet

DeatschWerks auto part

DeatschWerks

DeatschWerks 01-06 Audi A4/TT / VW Golf GTI 750cc Injectors

BD Diesel auto part

BD Diesel

BD DieselPower Throttle Sensitivity Booster v3.0 - VW / Audi / Porsche

CSF intercooler

CSF

CSF 05-09 Audi A4 2.0L OEM Intercooler

Go Fast Bits auto part

Go Fast Bits

GFB 13 Subaru BRZ / 13 Scion FR-S 3 Pc L/W Pulley Kit (Inc Crank/Alternator/Water Pump Pulleys)

K&N Engineering intake system

K&N Engineering

K&N Audi A4 2.8L V6 Performance Intake Kit

Injen polished cold air intake

Injen

Injen 17-19 Audi A4 2.0T Polished Cold Air Intake

Turbosmart auto part

Turbosmart

Turbosmart BOV Kompact Dual Port 2.0T VAG V2

Volant cold air intake

Volant

Volant 09-13 Audi A4 2.0T / 11-13 A5 2.0T Powercore Closed Box Air Intake System

Go Fast Bits auto part

Go Fast Bits

GFB Audi/VW 1.8T TMS Respons Blow Off Valve Kit

K&N Engineering intake system

K&N Engineering

K&N Audi A4 1.8L Turbo 150BHP Performance Intake Kit

Hella auto part

Hella

Hella 02-15 Audi / Volkswagen Electric Vacuum Pump

CSF intercooler

CSF

CSF 05-09 Audi A4 2.0L OEM Intercooler

Turbosmart black auto part

Turbosmart

Turbosmart Boost Reference Adapter 03+ VW Golf GTI MK5/6 2.0 TFSI - Black

Injen black cold air intake

Injen

Injen 17-19 Audi A4 2.0T Black Cold Air Intake

K&N Engineering intake system

K&N Engineering

K&N 95+ Audi A4 1.8i T Performance Intake Kit

Snow Performance auto part

Snow Performance

Snow Performance Stg 3 Boost Cooler EFI 2D MAP Prog. Water Injection Kit (SS Braided Line & 4AN)

Turbosmart auto part

Turbosmart

Fuel Pressure Regulator - TS-0402-1006

K&N Engineering cold air intake

K&N Engineering

K&N 09-10 Audi A4 2.0L Typhoon Air Intake

K&N Engineering air filter

K&N Engineering

K&N 94-05 Audi / 01-08 Skoda / 96-05 VW Drop In Air Filter

Injen polished cold air intake

Injen

Injen 09-16 Audi A4 2.0L (t) Polished Cold Air Intake

DeatschWerks auto part

DeatschWerks

DeatschWerks 01-06 Audi A4/TT / 00-06 VW Golf GTI Bosch EV14 1200cc Injectors (Set of 4)

Nitrous Express auto part

Nitrous Express

Nitrous Express - ALL SPORT COMPACT EFI SINGLE NOZZLE SYSTEM (35-50-75 HP) WITH 15LB BOTTLE - 20923-15

Go Fast Bits auto part

Go Fast Bits

GFB HYBRID TMS Dual Port 20mm Inlet/20mm Outlet 97-05 VW Golf GTI 1.8T

K&N Engineering intake system

K&N Engineering

K&N Audi A4/A6 11.9 TDI 90BHP Performance Intake Kit

Nitrous Express auto part

Nitrous Express

Nitrous Express - ALL SPORT COMPACT EFI SINGLE NOZZLE SYSTEM (35-50-75 HP) WITH 10LB BOTTLE - 20923-10

K&N Engineering air filter

K&N Engineering

K&N 14-16 Audi A4 L4-2.0L DSL Drop In Air Filter

DeatschWerks auto part

DeatschWerks

DeatschWerks 01-06 Audi A4/TT / VW Golf GTI 1000cc Injectors

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Go Fast Bits

GFB Diverter Valve dv+ 2.0T VAG Applications (Direct Replacement)

Turbosmart auto part

Turbosmart

Turbosmart VW/Audi 2.0T VAG V2 BOV Kompact Plumb Back Kit

Go Fast Bits auto part

Go Fast Bits

GFB Diverter Valve DV+ Volkswagen TSI/TFSI w/Pierburg Diverter Valve

Go Fast Bits auto part

Go Fast Bits

GFB Mach 2 TMS Recirculating Diverter Valve - 25mm Inlet/25mm Outlet

K&N Engineering air filter

K&N Engineering

K&N 15-18 Audi A4 L4-2.0 F/I Replacement Drop In Air Filter

NGK auto part

NGK

NGK Audi A4 1997-1996 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A4 Quattro 2009 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi TT 2001-2000 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A6 2009-2006 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A4 1999-1997 Direct Fit Oxygen Sensor

NGK wideband gauge

NGK

NGK OE Type 5-Wire Wideband A/F Sensor

NGK auto part

NGK

NGK Audi A4 2009-2005 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A4 2006-2000 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A4 2001-2000 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A3 2013-2011 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A6 2011-2010 Direct Fit Oxygen Sensor

NGK wideband gauge

NGK

NGK Audi A3 2013-2010 Direct Fit 5-Wire Wideband A/F Sensor

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.

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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