QUATTRO MEETS PRACTICALITY
B5 through B9 — Audi's compact sedan with available Quattro AWD and turbo power.
Audi A4 HERITAGE
THE QUATTRO COMPACT
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
CATEGORIES
Top product categories for the Audi A4
BRANDS
Top brands for Audi A4 builds
READY TO BUILD YOUR AUDI A4?
Pick your year and trim to shop verified-fit Audi A4 parts.
Shop all Audi A4 parts →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.

Mahle
Cabriolet A4 1.8L Turbo 2002-2005 2.0L Turbo 2005-2008 3.0L 2002-2005

Mahle
Audi S4 Cabriolet 4.2L 2004-2008

Mahle
Audi Cabriolet A4 S4 2003-2007 Allroad 2001-2005 A6 S6 2001-2004

Bosch
PARTS SET

Denso
AIR FILTER

Clevite
AUDI A4 3.2L 2007> AUDI A5 3.2L AND 4.2L 2007> MAHLE AIR FILTER

Hella
NON-RETURN VALVE

Clevite
AIR FILTER ELEMENT

Clevite
AUDI A4 1.8L 2.0L 2007> AUDI A5 1.8L 2007> AUDI Q5 2.0L TDI 20112012 MAHLE
Clevite
AUDI CABRIOLET A4 S4 20032007 ALLROAD 20012005 A6/S6 20012004 MAHLE CABIN

Mahle
Cabin Air Filter LA 1294

Mahle
AUDI 1781CC 1.8L (AMB) 2004-2006
Mahle
08-17 Audi/VW 1.8L/2.0L Vacuum Pump Moutning Gasket

Bosch
MAP SENSOR

Mahle
TURBOCHARGER MOUNTING GASKET SET 05-00 Volkswagen Passat 1.8L; 06-00 Audi A4 A4 Quattro 1.8L

Mahle
AUDI VOLKSWAGEN 1.8L 2.7L 2.8L 3.0L 1997-2006

Bosch
FUEL FILTER

Bosch
RETAINING RING

Mahle
AIR FILTER ELEMENT
Clevite
VW JETTA SCIROCCO RABBIT GOLF GTI W/O 16 VALVE 1990 CABRIO 19952002 MAHLE

Bosch
CABIN AIR FILTER

Mahle
~(0.8 lbs. 12X8X1)~ Quattro 2004-2000 Allroad Quattro 2005-2001 S4 2009-2004 MAHLE Cabin Air

Mahle
Audi A4 1.8L Turbo 2.8L 1996-2001 Cabriolet 2.8L AAH AFC 1995
Clevite
AUDI S4 CABRIOLET 4.2L 20042008 MAHLE FUEL FILTER

Mahle
AUDI 2671CC 2.7L BEL APB 2000-2006

Victor Reinz
Engine Intake Manifold Gasket - 71-31701-00
Clevite
AUDI 3123CC 3.2L BKH CALA CALB 20052012 THROTTLE BODY GASKET
Clevite
AUDI A4 2.0L TDI 3.2L A5 3.2L Q5 3.2L S5 4.2L 0809 MAHLE CABIN AIR FILTER

Mahle
AUDI/VW 1.8L AND 2.0L 2013-2018 TURBOCHARGED Fuel Injection O-Ring
Mahle
AUDI 3.0L 3.2L DOHC 24V 2005-2012
Clevite
AUDI A4 1.8L TURBO 2.8L 19962001 CABRIOLET 2.8L AAH AFC 1995 MAHLE CABIN AI

Denso
AIR FILTER

Mahle
~(0.2 lbs. 16X6X0)~ VW-PASS 1.8L 20VALVE DOHC TURBO 1998-2003

Bosch
CABIN AIR FILTER

Mahle
Audi Volkswagen 1984cc 2.0L Camshaft Adjuster Magnet Seal
Victor Reinz
Fuel Injection Throttle Body Mounting Gasket - 71-16550-00

Denso
AIR FILTER

Stainless Bros
Stainless Bros Bosch MAF Aluminum Flange

Radium Engineering
Radium Engineering VW/Audi EA888 Fuel Rail Plumbing / Port Injection

Go Fast Bits
GFB Mach 2 Atmosphere Conversion Kit-Changes T9107 or T9125 from Recir to Atmosphere

034Motorsport
X34, Intake Duct, Gloss, B9

034Motorsport
S34 Accel Pk, Stg 2, B8 A4/A5/

034Motorsport
K04-15 KKK TURBO,OEM,UPGRADEK

034Motorsport
S34, Gloss, B8 2.0T

034Motorsport
FUEL RAIL,1.8T DROP IN KIT

034Motorsport
X34, Gloss, B9 A4

034Motorsport
P34, B9 A4

034Motorsport
S34 Accel Pk, Stg 1, B8 A4/A5/
034Motorsport
P34 Accel Pk, Stg 1, B9 A4/A5/

034Motorsport
P34, MAF, B9 A4, ROW
Industrial Injection
Industrial Injection BorgWarner Audi/VW 2.0 TFSI 03 Turbo - BW-53039880105
Industrial Injection
Industrial Injection K04 Core Assembly - BW-53047100511

Industrial Injection
Industrial Injection K04 VW/ Audi Upgrade turbo - BW-53049887500

Industrial Injection
Industrial Injection K03-119 Turbocharger AUDI - BW-53039880106
STANDARD IGN
ELECTRONIC TB

STANDARD IGN
INTERMOTOR FUEL INJECTION

STANDARD IGN
ELECTRONIC TB

STANDARD IGN
INTERMOTOR MASS AIR FLOW

STANDARD IGN
FUEL INJECTOR MFI

STANDARD IGN
CANISTER PURGE SOL
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