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.

Draw-Tite
HITCH AUDI A4 SEDAN ONLY
Derale
TIMING KIT' 99 - 05 AUDI / VOLKSWAG

Raybestos Brakes
BRAKE ROTOR

Raybestos Brakes
DISC BRAKE ROTOR

Raybestos Brakes
PREMIUM NEW SEMI LOADED CALIPER

Raybestos Brakes
Brake Rotor: Various Makes and Models; Brake Rotor; Outside Diameter 12.283"; 5 Bolt Holes; Vented

Raybestos Brakes
FRICTION CALIPERS

Regionmax
RH HEADLAMP ASSY COMPOSITE W/HALOGEN AUDI A4 0508
Covercraft
CARGO LINER CARHARTT AUDI A4

Metra Electronics
AUDI HDMI AND CAMERA INTERFACE 2013

Raybestos Brakes
FRICTION CALIPERS

Raybestos Brakes
HARDWARE- HYDRAULICS

Moog
1720 AUDI A4/ALLROAD/A4 QUATTRO/1820 A5 QUATTRO CONTROL ARM AND BALL JOINT ASS
East Penn Manufacturing
WIRE PRIMARY 16 GA 4000
Covercraft
CARGO LINER CARHARTT AUDI A4
Dana
ENGINE CONVERSION GASKET SET
Dana
CONVERSION GASKET ST

Dana
HEAD GASKET SET

Dana
ENGINE CONVERSION GASKET SET

Dorman
THROTTLE BODY UNIT
Dorman
CONTROL ARM
Dorman
REAR DRIVESHAFT

Dorman
REAR DRIVESHAFT
Dorman
CONTROL ARM
Dorman
DRIVESHAFT AUDI

Dana
HEAD GASKET SET

Dorman
SECONDARY AIR INJECTION CHECK VALVE
Dorman
CAM PHASER

Dorman
CONTROL ARM W/ BALL JOINT

Dana
HEAD GASKET SET

Dorman
DOOR LOCK ACTUATOR

Dorman
CONTROL ARM

Dorman
COMBINATION VALVE

Dana
HEAD GASKET SET

Dorman
THIRD BRAKE LIGHT

Ferrea Racing
Ferrea VW 2.0T TS Single Spring 7 Deg Pro CNC Intake Titanium Retainer - Set of 8
Ferrea Racing
Ferrea Audi/VW 1.8T 20V Single Spring 7 Deg Pro CNC Intake Titanium Retainer - Set of 12

Walker Exhaust
MUFFLER ASSEMBLY - QUIET-

Walker Exhaust
RESONATOR ASSEMBLY - IMPO
Dorman
THIRD BRAKE LAMP

Planted Technology
Aud A4/S4 B9 Chassis 1

Planted Technology
Aud A4/S4 B9 Chassis 1
Brembo
Brembo 00-02 S4/02-05 A4/06-08 A4 Front GT BBK 6 Piston Cast 355x32 2pc Rotor Slotted TY3L-Red

Dorman
WATER PIPE
Dorman
HARMONIC BALANCER ASSEMBLY

Dorman
CONTROL ARM BUSHING
Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
COLGAN ORGL FRONT END BRA
Brembo
Brembo 04-08 S4/06-08 A4 Rear GT BBK 4 Piston Cast 2pc 345x28 2pc Rotor Slotted TY3L-Red
Brembo
Brembo 04-08 S4/06-08 A4 Rear GT BBK 4 Piston Cast 2pc 345x28 2pc Rotor Slotted TY3L-Black

Dorman
TURBOCHARGER COOLANT FEED LINE

Dorman
ABS SENSOR

Arc Lighting
Xtreme Series D5 HID Replacement LED Bulb Kit (2 EA)
Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
COLGAN ORGL FRONT END BRA
Brembo
Brembo 00-02 S4/02-05 A4/06-08 A4 Fr GTR BBK 6 Pist Billet 355x32 2pc Rotor Slotted TY3L- Nickel
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