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.

Sherman Parts
CAPA LH RR BUMPER BRACKET; SEDAN/WAGON; A4 0916; S4 1016
Sherman Parts
FRONT BUMPER AIR SHIELD LOWER W/O SLINE PKG AUDI A4 0912
Sherman Parts
CAPA HOOD PANEL ASSY GEN 3; STEEL AUDI A4 0508

Dana
CYLINDER HEAD GASKET

Dana
ENGINE CRANKSHAFT SEAL

Metra Electronics
AUDI A4/A6/A8 96-99 A4 01

Raybestos Brakes
BRAKE ROTR

Regionmax
LH HEADLAMP ASSY COMPOSITE W/HALOGEN AUDI A4 0508

Regionmax
LH HEADLAMP ASSY COMPOSITE; 4DR SDN/4DR WGN; HALOGEN; A4 0205

Raybestos Brakes
HARDWARE- HYDRAULICS
Moog
TIE ROD

Metra Electronics
AUDI Q3 (TYP 8U) (W/CONCERT RADIO)

Raybestos Brakes
DISC BRAKE ROTR

Dana
ENGINE CRANKSHAFT SEAL

Raybestos Brakes
BRAKE ROTR

Jet Performance Products
JET XCELERATOR
Jet Performance Products
~(1 lbs. 7X7X2)~ V-Force Plus
Metra Electronics
AUDI (WITH CONCERT RADIO) HDMI AND

Derale
NEW WATER PUMP

Raybestos Brakes
DISC BRAKE ROTOR

Raybestos Brakes
BRAKE ROTOR
Covercraft
CARGO LINER CARHARTT AUDI A4

Raybestos Brakes
BRAKE CALIPER & BRACKET

Covercraft
CARGO LINER CARHARTT AUDI A4

Driven Racing Oil
SYNTHETIC DUAL CLUTCH FLUID PALLET

Raybestos Brakes
BRAKE ROTOR

Metra Electronics
AUDI A4 (8K) A5 (8TF/8/F7/8TA) 2009

Raybestos Brakes
BRAKE ROTOR

Raybestos Brakes
BRAKE ROTOR
Dana
GASKET, CYLINDER HEAD

Derale
NEW WATER PUMP WITH BACK HOUSING
Ram Clutch
POWERGRIP CLUTCH SET JEEP 10.5 X 1 1/810

Raybestos Brakes
DISC BRAKE ROTOR

Derale
NEW WATER PUMP

Dana
ENGINE CRANKSHAFT SEAL

Morimoto Lighting
D2S: OSRAM 66240XN2 (4200K / SET)

Raybestos Brakes
BRAKE ROTOR

Raybestos Brakes
BRAKE ROTOR
Raybestos Brakes
BRAKE CALIPER & BRACKET
Metra Electronics
AUDI A4 (8K) A5 (8TF/8/F7/8TA) 2009

Metra Electronics
NON-AMPLIFIED AND AMPLIFIED DATA IN
Raybestos Brakes
HARDWARE- HYDRAULICS

Morimoto Lighting
2014-2021 TUNDRA STAGE 3 MORIMOTO X
Raybestos Brakes
BRAKE CALIPER

Raybestos Brakes
BRAKE CALIPER

Raybestos Brakes
BRAKE ROTOR

Raybestos Brakes
BRAKE CALIPER

Raybestos Brakes
BRAKE MASTER CYLINDER

Raybestos Brakes
BRAKE ROTR

Raybestos Brakes
DISC BRAKE ROTOR

Raybestos Brakes
DISC BRAKE ROTOR
Raybestos Brakes
BRAKE CALIPER & BRACKET

Raybestos Brakes
BRAKE ROTOR

Raybestos Brakes
PREMIUM NEW SEMI LOADED CALIPER

Moog
WHEEL BEARING AND HUB ASSEMBLY

Raybestos Brakes
BRAKE MASTER CYLINDER

Raybestos Brakes
BRAKE CALIPER & BRACKET

Regionmax
RH TAILLAMP ASSY OUTER; SEDAN; LED TYPE; A4 0912
Raybestos Brakes
FRICTION CALIPERS

Raybestos Brakes
DISC BRAKE ROTR ONLY
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