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.

MOTORAD
THERMOSTAT

TRAKMOTIVE
CV AXLE SHAFT

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR

TRAKMOTIVE
CV AXLE SHAFT

TRAKMOTIVE
NEW CV AXLE

TRAKMOTIVE
NEW CV AXLE

DAYCO HYDRAULIC
WATER PUMP KIT
DAYCO HYDRAULIC
WATER PUMP BELT AND TENSI
REMY
REMANUFACTURED ALTERNATOR
REMY
REMANUFACTURED ALTERNATOR

DAYCO HYDRAULIC
TENSIONER
STANDARD IGN
PARKING ASSIST SENSOR

STANDARD IGN
RELAY

Walker Products Inc. - Sensors
OXYGEN SENSOR

TRAKMOTIVE
ALL NEW CV AXLE
TRAKMOTIVE
ALL NEW CV AXLE

VALEO
V-RF7 LED LIGHT BAR SPOT KIT
VALEO
V-RF50 LED LIGHT BAR COMBO KIT
USA Standard (Yukon)
Manual Transmission Bearing Kit 89 and UP VW Black Rear Cover

STANDARD IGN
COOLING FAN MODULE

TRAKMOTIVE
CV AXLE SHAFT

TRAKMOTIVE
NEW CV AXLE

TRAKMOTIVE
NEW CV AXLE

TRAKMOTIVE
NEW CV AXLE

Walker Products Inc. - Sensors
OXYGEN SENSOR

REMY
REMANUFACTURED ALTERNATOR

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR ASSEMBLY

TRAKMOTIVE
NEW CV AXLE

USA Standard (Yukon)
USA Standard Manual Transmission Bearing Kit 1989 VW Black Rear Cover M T BEARING KIT 89 UP VW BLA

Walker Products Inc. - Sensors
OXYGEN SENSOR

TRAKMOTIVE
CV AXLE SHAFT

TRAKMOTIVE
NEW CV AXLE

TRAKMOTIVE
NEW CV AXLE

TRAKMOTIVE
NEW CV AXLE

TRAKMOTIVE
NEW CV AXLE

Extreme Dimensions
2009-2012 Audi A4 B8 Duraflex Dante Rear Wing Spoiler - 1 Piece
STANDARD IGN
DIVERTER VALVE

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR

TRAKMOTIVE
NEW CV AXLE

DAYCO HYDRAULIC
BELT TENSIONER AND IDLER

TRAKMOTIVE
NEW CV AXLE

Walker Products Inc. - Sensors
OXYGEN SENSOR

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR

The Wheel Group
KRAZE LUSSO KR190 GLOSS BLACK 17X8 5-112 38MM 66.56MM
TIMKEN
SL260529;A/AM-SRC SEAL

Walker Products Inc. - Sensors
OXYGEN SENSOR

STANDARD IGN
VEHICLE SPEED SENSOR

Walker Products Inc. - Sensors
OXYGEN SENSOR

Goodyear
SERPENTINE BELT TENSIONER FEADTENSIONER

Walker Products Inc. - Sensors
OXYGEN SENSOR
STANDARD IGN
INTAKE MANIFOLD ACTUATOR

Omega Tool Corporation
RACK AND PINION
Suspension Techniques
ST Sport-tech Lowering Springs Audi A4 (8E/B6-B7) Convertible Wagon Quattro

TIMKEN
PRESET PRE-GREASED AND PRE-SEALED

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR
MONROE SHOCKS & STRUTS
QUICK-STRUT ASSEMBLY

WAGNER BRAKE
SEMI-MET BRAKE PADS

Extreme Dimensions
2006-2008 Audi A4 S4 B7 4DR Duraflex RS4 Wide Body Front Fenders - 2 Piece
USA Standard (Yukon)
USA Standard Manual Transmission Bearing Kit 1989 VW Black Rear Cover w Synchro M T BEARING KIT 89
STANDARD IGN
ABS WHEEL SPEED SENSOR WIRE HARNESS
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