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.

Dorman
ABS SENSOR

Dorman
TIE ROD END

Dorman
TIE ROD END - OUTER

Megan Racing
Megan Audi A4 A5 17 Euro Series Coilover Kit (Active Suspension 53mm diameter front strut) MSRP $999 (SPECIAL ORDER)
AP Exhaust Products
MUFFLER CENTER ANSA OER
AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
EXHAUST PIPE FRONT ANSA OER

Brembo
Brembo Axle Set HP2000 High Performance Low Dust Street Compound (N and J Caliper) W/Cut Out

AP Exhaust Products
AUDI A4 QUATTRO OBDII CATALYTIC CONVERTER DIRECT FIT

Ferrea Racing
Ferrea VW 1.8T 20V 26.9mm 5.97mm 105.1mm 24 Deg S-Flo Stk Grv Comp Plus Intake Valve - Set of 12
AP Exhaust Products
MUFFLER REAR ANSA OER

AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
MUFFLER CENTER ANSA OER
Dorman
CONTROL ARM

Dorman
THROTTLE BODY UNIT

Planted Technology
Aud A4/S4 B8 Chassis 0
Dorman
HARMONIC BALANCER

Planted Technology
Aud A4 B5 Chassis 94-0

Dorman
CONTROL ARM

Ferrea Racing
Ferrea Audi 2.0T FSI Double Spring 7 Deg Pro CNC Titanium Retainer - Set of 16

Dorman
HEATER HOSE ASSEMBLY
Brembo
Brembo 17+ A4/18+ A5/18+ S4/18+ S5 Front GT BBK 6 Piston Cast 380x34 2pc Rotor Slotted TY3L- White

Ferrea Racing
Ferrea VW 2.0T TSI F5134.9mm 5.98mm 20 Deg S-Flo +1mm Trpl Grv Comp Plus Intake Valve - Set of 8
Dorman
REAR DRIVESHAFT

Dorman
REGULATOR ONLY POWER

Dorman
BLOWER MOTOR RES
Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
COLGAN ORGL FRONT END BRA

Dorman
CONTROL ARM W/ BALL
Brembo
Brembo 04-08 S4/06-08 A4 Rear GT BBK 4 Piston Cast 2pc 345x28 2pc Rotor Slotted TY3L-Silver

AP Exhaust Products
9601 A4 2.8L PREBENT EXHAUST PIPE
Brembo
Brembo 08-17 A5/08-17 S5/09-16 A4/09-16 S4 Fr GT BBK 6Pist Cast 380x34 2pc Rotor Slot TY3L- Yellow

WIX
AIR FILTER MIN ORDER QTY1

Dorman
BALL JOINT
Dorman
AIR CHECK VALVE

Dorman
HID BALLAST

Dorman
CLUTCH SLAVE CYL
Brembo
Brembo 00-02 S4/02-05 A4/06-08 A4 Front GT BBK 6 Piston Cast 355x32 2pc Rotor Slotted TY3L- Yellow
Dorman
TIMING COVER

Brembo
Brembo 08-17 A5 Front GTR BBK 6 Piston Billet 380x34 2pc Rotor Slotted TY3L- Nickel
Brembo
Brembo 08-17 A5/08-17 S5/09-16 A4/09-16 S4 Fr GT BBK 6Pist Cast 380x34 2pc Rotor Slot TY3L-Silver
Brembo
Brembo 08-17 A5/08-17 S5/09-16 A4/09-16 S4 Fr GT BBK 6Pist Cast 380x34 2pc Rotor Slot TY3L-Black
Covercraft
COLGAN ORGL FRONT END BRA

Dorman
BALL JOINT

Dorman
TIMING COVER

Dorman
TIMING COVER

Planted Technology
Aud A4 B5 Chassis 94-0

Dorman
DUAL FAN ASSEMBLY

Brembo
Brembo 08-17 A5/08-17 S5/09-16 A4/09-16 S4 Fr GT BBK 6 Pist Cast 380x34 2pc Rotor Slotted TY3L-Red

Ferrea Racing
Ferrea 09-13 Audi 2.0L TFSI Single Spring Kit
Dorman
HID CONTROL MODULE
Dorman
HID CONTROL MODULE
Dorman
ENGINE COOLANT THERMOSTAT HOUSING A

AP Exhaust Products
MUFFLER REAR ANSA OER
Covercraft
COLGAN ORGL FRONT END BRA
AP Exhaust Products
EXHAUST PIPE FRONT ANSA OER

AP Exhaust Products
MUFFLER REAR ANSA OER
AP Exhaust Products
CATALYTIC CONVERTER UNIVERSAL OBDII CALIFORNIA STD OVAL ANGLED
AP Exhaust Products
CATALYTIC CONVERTER UNIVERSAL OBDII CALIFORNIA STD ROUND O2
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