QUATTRO MEETS PRACTICALITY

B5 through B9 — Audi's compact sedan with available Quattro AWD and turbo power.

Audi A4 HERITAGE

THE QUATTRO COMPACT

The Audi A4 has been the German compact sport sedan since 1994. The B5 (1.8T) launched the tuner-friendly chassis, the B6/B7 added the K04 turbo upgrade culture, and the B8/B9 brought EA888 turbocharged 2.0T engines that share parts with the VW Golf R / Jetta GLI.

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

3,135
Parts that fit
3,000+
MOTORMIA Builds
EBC
#1 brand by SKUs
$711
Average MSRP

READY TO BUILD YOUR AUDI A4?

Pick your year and trim to shop verified-fit Audi A4 parts.

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Verified Fitment

Audi A4 Parts

8164 parts available

Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

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ABS SENSOR

Dorman

ABS SENSOR

TIE ROD END

Dorman

TIE ROD END

TIE ROD END - OUTER

Dorman

TIE ROD END - OUTER

Megan Racing coilovers

Megan Racing

Megan Audi A4 A5 17 Euro Series Coilover Kit (Active Suspension 53mm diameter front strut) MSRP $999 (SPECIAL ORDER)

A

AP Exhaust Products

MUFFLER CENTER ANSA OER

A

AP Exhaust Products

MUFFLER REAR ANSA OER

A

AP Exhaust Products

EXHAUST PIPE FRONT ANSA OER

Brembo auto part

Brembo

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

AP Exhaust Products auto part

AP Exhaust Products

AUDI A4 QUATTRO OBDII CATALYTIC CONVERTER DIRECT FIT

Ferrea Racing intake system

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

A

AP Exhaust Products

MUFFLER REAR ANSA OER

AP Exhaust Products muffler

AP Exhaust Products

MUFFLER REAR ANSA OER

A

AP Exhaust Products

MUFFLER CENTER ANSA OER

D

Dorman

CONTROL ARM

Dorman throttle body

Dorman

THROTTLE BODY UNIT

Aud A4/S4 B8 Chassis 0

Planted Technology

Aud A4/S4 B8 Chassis 0

D

Dorman

HARMONIC BALANCER

Aud A4 B5 Chassis 94-0

Planted Technology

Aud A4 B5 Chassis 94-0

Dorman control arms

Dorman

CONTROL ARM

Ferrea Racing titanium springs

Ferrea Racing

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

HEATER HOSE ASSEMBLY

Dorman

HEATER HOSE ASSEMBLY

B

Brembo

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

Ferrea Racing intake system

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

D

Dorman

REAR DRIVESHAFT

REGULATOR ONLY POWER

Dorman

REGULATOR ONLY POWER

Dorman auto part

Dorman

BLOWER MOTOR RES

C

Covercraft

COLGAN ORGL FRONT END BRA

C

Covercraft

COLGAN ORGL FRONT END BRA

C

Covercraft

COLGAN ORGL FRONT END BRA

Dorman control arms

Dorman

CONTROL ARM W/ BALL

B

Brembo

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

AP Exhaust Products exhaust

AP Exhaust Products

9601 A4 2.8L PREBENT EXHAUST PIPE

B

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

WIX

AIR FILTER MIN ORDER QTY1

BALL JOINT

Dorman

BALL JOINT

D

Dorman

AIR CHECK VALVE

Dorman auto part

Dorman

HID BALLAST

CLUTCH SLAVE CYL

Dorman

CLUTCH SLAVE CYL

B

Brembo

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

D

Dorman

TIMING COVER

Brembo auto part

Brembo

Brembo 08-17 A5 Front GTR BBK 6 Piston Billet 380x34 2pc Rotor Slotted TY3L- Nickel

B

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

B

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

C

Covercraft

COLGAN ORGL FRONT END BRA

BALL JOINT

Dorman

BALL JOINT

TIMING COVER

Dorman

TIMING COVER

Dorman auto part

Dorman

TIMING COVER

Aud A4 B5 Chassis 94-0

Planted Technology

Aud A4 B5 Chassis 94-0

Dorman auto part

Dorman

DUAL FAN ASSEMBLY

Brembo red auto part

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 springs

Ferrea Racing

Ferrea 09-13 Audi 2.0L TFSI Single Spring Kit

D

Dorman

HID CONTROL MODULE

D

Dorman

HID CONTROL MODULE

D

Dorman

ENGINE COOLANT THERMOSTAT HOUSING A

AP Exhaust Products muffler

AP Exhaust Products

MUFFLER REAR ANSA OER

C

Covercraft

COLGAN ORGL FRONT END BRA

A

AP Exhaust Products

EXHAUST PIPE FRONT ANSA OER

AP Exhaust Products muffler

AP Exhaust Products

MUFFLER REAR ANSA OER

A

AP Exhaust Products

CATALYTIC CONVERTER UNIVERSAL OBDII CALIFORNIA STD OVAL ANGLED

A

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