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 Parts
8164 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

Mahle
VW-Pass 1.9L TDI ALH 10 00-2004 BEW 2004-2006 BRM 2005-2006
Clevite
FUEL INJECTOR O-RING KIT
Clevite
SLEEVE ASSEMBLY RING SET
Clevite
AUDI 3.0L 3.2L DOHC 24V 20052012 PLENUM CHAMBER

Bosch
CRANKSHAFT SENSOR

Bosch
RETAINING RING

Clevite
INTAKE VALVE
Gates
Gates Power Steering Repair Kit
Bosch
BE1953H BRAKE PADS
Mahle
~(0.3 lbs. 23X15X0)~ 96-08 VW/Audi

Mahle
~(0.9 lbs. 11X9X1)~ Audi A4 2.0L TDI 3.2L A5 3.2L Q5 3.2L S5 4.2L 08-09

NGK
NTK EH0335 CAM/CRANK POSITION SENSOR

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

Hella
SENSOR CAMSHAFT POSITION

Mahle
AUDI 2771CC 2.8L SOHC 12V 1996-1998
Bosch
DISC BRAKE PADS

Hella
SENSOR WHEEL SPEED

Mahle
Audi S4 Cabriolet 4.2L 2004-2008

Mahle
BEHR ThermostatInsert 2009-2013 VW Audi 2.0L with BEHR waterpump

Mahle
Audi A4 2.0L TDI 3.2L A6 3.2L 4.2L A8 R8 RS4 S4 4.2L S6 and S8 5.2L
Clevite
ENGINE COOLANT THERMOSTAT

Magnaflow
Flange Gasket - 09-14 Audi A4 Quattro

Bosch
ARMATURE

Magnaflow
Bolt - 97-10 Audi VW

Bosch
BRAKE PADS

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

Mahle
BEHR ThermostatIntegral AUDI VW 1.8L 2.0L BGB BPJ BUL BWE BYK AMB BPG BWT

Clevite
AUDI / VOLKSWAGEN 1984CC 2.0L GASOLINE TURBOCHARGED 20082014 VALVE COVER SET

Bosch
PROTECTIVE CAP

Hella
SENSOR CAMSHAFT POSITION

Clevite
THERMAL PRODUCTS
Bosch
DISC BRAKE ROTOR

Clevite
AUDI 2976CC 3.0L 20022006 TIMING COVER SET

Clevite
AUDI 2995CC 3.0L 3123CC 3.2L 2008 VALVE COVER GASKET (LEFT)

Bosch
PARTS SET

Hella
SENSOR PARKING ASSIST

Mahle
Audi A4 1.8L Turbo AMB 2002-2006

Denso
AIR FILTER

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

Clevite
CABIN AIR FILTER

Clevite
MAHLE FILTERS

Bosch
BOSCH WHEEL SPEED SENSOR
Hella
WARNING CONTACT, BRAKE PAD WEAR

NGK
NTK EC0240 CAM/CRANK POSITION SENSOR

Stoptech
STANDARD BALL BEARING
Mahle
Oil Pan Set HYUNDAI 1975CC 2.0L BETA 1997-2007

Hella
BRAKE PAD SET, DISC BRAKE

Gates
Gates 19/32in x 19/32in x 12 1/8in

Clevite
TURBOCHARGER MOUNTING GASKET SET

Victor Reinz
Engine Cylinder Head Bolt Set - 14-32166-03

Bosch
CRANKSHAFT SENSOR

Clevite
AUDI / VW 3.0L 3.2L DOHC 24V 20052012 CYLINDER HEAD BOLTS
Bosch
MAP SENSOR

Hella
NON-RETURN VALVE

Bosch
COOLING FAN

Dorman
CONTROL ARM
Bosch
COMMUTATOR END SHIEL

Dorman
CONTROL ARM

Clevite
AIR FILTER ELEMENT
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