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.
Brembo
Brembo 00-02 S4/02-05 A4/06-08 A4 Front GT BBK 6 Piston Cast 355x32 2pc Rotor Slotted TY3L-Silver
Brembo
Brembo 00-02 S4/02-05 A4/06-08 A4 Front GT BBK 6 Piston Cast 355x32 2pc Rotor Slotted TY3L-Black
Megan Racing
Megan Audi A4 A4 S4 A5 S5 B8 8K 08-14 Front Lower Arm Rear 2pcs MSRP $286
Dorman
LATERAL ARM

Dorman
TURBO LINE
Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
AUDI CAR BRA
Covercraft
COLGAN ORGL FRONT END BRA

Dorman
TURBOCHARGER

Dorman
BOOST SOLENOID

Denso
AIR/FUEL SENSOR

Dorman
CLUTCH MASTER CYL

Dorman
AIR CHECK VALVE

Dorman
TRAILING ARM

Dorman
TRAILING ARM

Dorman
CONTROL ARM W/O BALL JOINT
Brembo
Brembo 08-17 A5/09-16 A4/09-17 Q5 2.0T/3.2FSI Fr GT BBK 6Pist Cast 355x32 2pc Rotor Slot TY3L-Red

Dorman
CONTROL ARM
Dana
HEAD GASKET SET

Dana
HEAD GASKET SET

Dorman
VVT SOLENOID

Dorman
VVT SOLENOID
Dorman
CONTROL ARM W/O BALL

Dorman
VVT SOLENOID

Dorman
CONTROL ARM W/O BALL JOINT

Walker Exhaust
CONVERTER- DF- CARB- CALC
Dorman
ELECTRIC PARKING BRAKE MOTOR

Dorman
REAR DRIVESHAFT

Walker Exhaust
CONVERTER- DF- EPA- ULTRA
Walker Exhaust
RESONATOR ASSEMBLY - IMPO
Dorman
REAR DRIVESHAFT

Megan Racing
Megan Audi A4 09-13 A5 08-13 S5 08-11 Rear Sway Bar 25.4mm 3pcs

Dorman
VVT SOLENOID

Megan Racing
Megan Audi A4 8K S4 A5 8T S5 Q5 8R Rear Reinforced Stab Link 2pcs MSRP $165

Dorman
VARIABLE VALVE TIMING SOLENOID

Dorman
OIL FILTER CAP
Covercraft
COLGAN ORGL FRONT END BRA

Dorman
CONTROL ARM

WIX
OIL FILTER MIN ORDER QTY1
Covercraft
COLGAN ORGL FRONT END BRA

Dorman
VALVE TIMING SOLENOID

Dorman
LATERAL ARM

Dorman
VARIABLE VALVE TIMING SOLENOID
Brembo
Brembo 08-17 A5/09-16 A4 Front GT BBK 6 Piston Cast 380x34 2pc Rotor Slotted TY3L- White
Brembo
Brembo 08-17 A5/09-16 A4 Front GT BBK 6 Piston Cast 380x34 2pc Rotor Slotted TY3L-Red

Dorman
WINDOW REGULATOR

Dorman
BUSHING

Dorman
CONTROL ARM W/O BALL JOINT
Brembo
Brembo 17+ A4/18+ A5/18+ S4/18+ S5 Fr GT BBK 6Pist Cast 380x34 2pc Rotor Slot TY3L- Fluo. Yellow
Covercraft
COLGAN ORGL FRONT END BRA

Brembo
Brembo 08-17 A5/09-16 A4 Front GT BBK 6 Piston Cast 380x34 2pc Rotor Slotted TY3L- Yellow
Brembo
Brembo 08-17 A5/09-16 A4 Front GT BBK 6 Piston Cast 380x34 2pc Rotor Slotted TY3L-Black
Holley
SELECTA SPEED WIPER KIT, INIVERSAL

Planted Technology
Aud A4/S4 B6 Chassis 0

Ferrea Racing
Ferrea VW VR6 R32 30.20mm 5.96mm 136.48mm 25 Deg Taper Flo Stk Super Alloy Exhaust Valve - Set of 6

AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
MUFFLER CENTER ANSA OER
AP Exhaust Products
MUFFLER REAR ANSA OER

Planted Technology
Aud A4/S4 B6 Chassis 0
Covercraft
COLGAN ORGL FRONT END BRA
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