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.
Regionmax
LH FOG LAMP ASSY; WAGON; A4 0912

Raybestos Brakes
BRAKE HOSE

Raybestos Brakes
BRAKE CALIPER RUBBER

Derale
NEW WATER PUMP
Dana
EXHAUST PIPE GASKET

Raybestos Brakes
BRAKE HOSE

Derale
NEW WATER PUMP

Metra Electronics
AD-ADXSVI AUDI CAN INTERFACE 2006-2013

Raybestos Brakes
BRAKE ROTRS

Derale
NEW WATER PUMP

Raybestos Brakes
DRUMS AND ROTRS

Morimoto Lighting
~(0.1 lbs. 6X5X0)~ RQ Hardware: Audi A4 B6 (Mini H1 8.0)
K-Source Inc.
REPLACEMENT MIRROR

Raybestos Brakes
HARDWARE- HYDRAULICS

Metra Electronics
AFTRMARKET ANTENNA TO VW CABLE

Demco
LEFT MTG BRACKET F/ 9517033 BLACK T

Metra Electronics
INSTALL KIT AUDI A4 00-01

Raybestos Brakes
FRICTION CALIPERS

Raybestos Brakes
BRAKE HOSE

Piaa
~(0.3 lbs. 4X4X2)~ H7 Xtreme White Hybrid Bulb 3900K - 12V 55W - Twin Pack
Raybestos Brakes
HARDWARE- HYDRAULICS

Raybestos Brakes
BRAKE ROTOR

Raybestos Brakes
BRAKE PARTS

Dana
OIL PAN GASKET
Raybestos Brakes
FRICTION CALIPERS

Metra Electronics
AUDI A4 02-08 SDIN-DDIN KIT

Metra Electronics
8805 AUDI/BMW/MERCEDES/VW FACTORY ANTENNA W/FLAT PLUG ANTENNA ADAPTER

Metra Electronics
AUDI A3 A4 1996-2001 SPEAKER ADAPTER - 6 TO 6 3/4IN

Regionmax
RH FOG LAMP ASSY; WAGON; A4 0912

Regionmax
LH FOG LAMP ASSY AD A4 4D 0912/A4 ALLROAD 1316/A6/S6 0911/Q5 0917; SQ5 1417

Brembo
Brembo 2015+ Audi Q7 / 2016+ Audi A5 Drilled Disc Brake Rotor

Dana
INTAKE MANIFOLD GASKET
Moog
SUSPENSION CONTROL ARM AND BALL JOI

Raybestos Brakes
BRAKE ROTOR

Metra Electronics
8805 AUDI/BMW/MERCEDES/VW FACTORY RADIO W/FLAT CONNECTOR TO AFTERMARKET ANTENNA
Dana
EXHAUST PIPE GASKET
Dana
EXHAUST PIPE GASKET

Dana
FUEL INJECTOR O-RING KIT

Dana
CRANKCASE COVER GASKET SET

Dana
HEAD GASKET SET

Dorman
SPINDLE BOLT
Cloyes Gear & Products
TIMING BELT AUDI 1998

Dorman
STABILIZER BAR LINK KIT

Ferrea Racing
Ferrea VW 2.0T TS Single Spring 7 Deg Pro CNC Intake Titanium Retainer - Single

Dorman
OIL FILTER CAP - PLASTIC
Dorman
RACK BELLOW
Dorman
BRAKE HOSE
Dorman
TIE ROD
WIX
AIR FILTER MIN ORDER QTY1

Dorman
BACK UP SENSOR

Dorman
DISC BRAKE HDWE KIT

Dorman
DISC BRK GUIDE BOLT/

Dorman
DISC BRAKE HDWE KIT

Dorman
ABS SENSOR

Dorman
CRANKSHAFT SENSOR
Cloyes Gear & Products
TIMING BELT

Dorman
SWAY BAR BUSHING KIT

Dorman
DSC HW KIT

Dana
MOUNTING KIT, CHARGER

Dorman
TIE ROD
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