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 exterior components Parts
2182 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

Hella
BRAKE PAD SET DISC BRAKE
Hella
INTERIOR BLOWER
Hella
CONDENSER AIR CONDITIONING

Putco
NITE-LUX P13

Hella
INTERIOR BLOWER
SPYDER
1215 AUDI A4 HID NONAFS OE PROJECTOR HEADLIGHTS LEFT

SPYDER
0608 AUID A4 (HALOGEN ONLY DOES NOT FIT HID MODELS ) OEM STYLE HEADLIGHTS BLACK
SPYDER
0608 AUID A4 (HALOGEN ONLY DOES NOT FIT HID MODELS ) PASSENGER SIDE HEADLIGHTS
Mahle
AUDI 4172CC 4.2L 2003-2004 RS4

Hella
STARTER 12 V

SPYDER
1719 AUDI A4 S4 XENON HID LED DRL OE HEADLIGHTS LEFT

Dorman
WIPER TRANSMISSION
Hella
BRAKE CALIPER

SPYDER
1215 AUDI A4 HID NONAFS OE PROJECTOR HEADLIGHTS RIGHT

CSF
CSF 16-21 BMW M5 (F90) / 17-21 BMW M8 (F91/F92/F93) Twin Charge-Air-Cooler Set - Nitro Yellow

Putco
NITELUX LED P13W SGL UV

Hella
BRAKE PAD SET DISC BRAKE

Bosch
GDI FUEL INJECTOR

Hella
DISC BRAKE ROTOR

Hella
CRANKSHAFT SENSOR VW/AUDI
Hella
ADDITIONAL WATER PUMP 8TW

Hella
STARTER 12V

Hella
STARTER 12V

Hella
STARTER 12V

EBC
EBC 08-15 Audi A4 Quattro Apollo Balanced Big Brake Kit (Front) - Black

Hella
DISC BRAKE ROTOR

Mahle
Evaporator

Hella
BULB 12V 18W BA15S S8
Stoptech
ORIGINAL PERFORMANCE

Dorman
HEADLAMP - LEFT
Hella
BRAKE CALIPER

Dorman
WIPER TRANSMISSION

Dorman
WIPER ARM

Dorman
CONTROL ARM
Hella
CONDENSER AIR CONDITIONING

Dorman
HEADLAMP - RIGHT
Hella
STARTER

NGK
ENGINE CAMSHAFT POSITION SENSOR

Victor Reinz
Engine Cylinder Head Gasket Set - 02-31955-01

Bosch
WIPER MOTOR

Dorman
CONTROL ARM
Hella
COMPRESSOR AIR CONDITIONING

Rhino-Rack USA
Rhino-Rack Vortex Aero Bar - 50in - Single - Black

K&N Engineering
K&N 08 Audi A5 / S5 V6-3.2L / V8-4.2L Drop In Air Filter
Stoptech
Centric Premium Control Arm and Ball Joint - Front Left
Stoptech
Centric Premium Control Arm and Ball Joint - Front Right

Stoptech
Centric Premium Spring Seat and Insulator - Front

Rhino-Rack USA
Rhino-Rack Sportz Bar 1180mm Black - U
R1 Concepts
R1 19-21 Subaru Forester Front Left Drilled Black Brake Rotor

R1 Concepts
R1 18-20 Genesis G80 Front Left Slotted Black Brake Rotor

R1 Concepts
R1 2016-2025 Audi A6 Quattro Front R1 Euro Ceramic Pads & Hardware Kit

R1 Concepts
R1 2008-2017 Audi A5 Front R1 Optimum OE Pads & Hardware Kit

R1 Concepts
R1 2008-2017 Audi A4 Quattro Front R1 Euro Ceramic Pads & Hardware Kit

R1 Concepts
R1 98-08 Audi A6 (USA/Canada) Front Euro Ceramic Pads & Hardware Kit

R1 Concepts
R1 00-09 Audi A4 (USA/Canada) Front Optimum OE Pads & Hardware Kit

K&N Engineering
K&N Oil Filter Automotive 08-10 VW Passat
R1 Concepts
R1 96-05 Audi A4 Quattro Rear Right Drilled Black Brake Rotor
Brembo
Brembo OE Ceramic Disc Brake Kit

R1 Concepts
R1 17-19 Audi A4 Quattro Front Right Drilled Black Brake Rotor

R1 Concepts
R1 17-19 Audi A4 Quattro Front Left Drilled Black Brake Rotor
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