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.

WAGNER BRAKE
CERAMIC DISC PAD SET

Suspension Techniques
ST Anti-Swaybar Set 08+ Audi A4 & S4 (B8) Sedan & Wagon/2wd & Quattro

Suspension Techniques
ST Rear Anti-Swaybar Set 08+ Audi A4 & S4 (B8) Sedan & Wagon/2wd & Quattro

Suspension Techniques
ST Shock Kit Audi A4 (8E/B6-B7) Sedan 2WD Quattro Wagon Quattro Convertible

Suspension Techniques
ST Adjustable Lowering Springs 2017+ Audi A4 Sedan 4WD w/EDC

Suspension Techniques
ST Audi A4 / S4 (B9) Sedan A5 S5 (B9) Coupe 4WD Adjustable Lowering Springs

Suspension Techniques
ST Audi A4 (B9) Sedan 2WD Adjustable Lowering Springs

Suspension Techniques
ST XA Coilover Kit 02-08 Audi A4 (8E/B6-B7) Sedan 2WD

Suspension Techniques
ST Sport-tech Lowering Springs Audi A4 (8E/B6-B7) Sedan Quattro
STANDARD IGN
ABS SENSOR HARNESS

STANDARD IGN
AIR PUMP - NEW

FOUR SEASONS
PARALLEL FLOW CONDENSER

STANDARD IGN
INTERMOTOR VARIABLE VALVE TIMING SO
STANDARD IGN
INTERMOTOR VARIABLE VALVE TIMING SO
STANDARD IGN
VVT CHAIN TENSIONER
STANDARD IGN
VARIABLE VALVE TIMING SOLENOID

STANDARD IGN
BRAKE BOOST SENSOR

TIMKEN
CLUTCH RELEASE BEARING
R/M BRAKES
DISC PAD

STANDARD IGN
AIR CHARGE TEMPERATURE SENSOR

FOUR SEASONS
STANDARD ROTATION THERMAL

FOUR SEASONS
STANDARD ROTATION THERMAL

STANDARD IGN
VVT SOLENOID

STANDARD IGN
INTRMTR VOLTAGE REGULATOR

STANDARD IGN
INTRMTR VOLTAGE REGULATOR

STANDARD IGN
LOCKS - IGNITION
STANDARD IGN
TURBOCHARGER - NEW

STANDARD IGN
DIVERTER VALVE

STANDARD IGN
CRANK SENS

STANDARD IGN
AUDI A4, A6 2.8L ACK 05-9

FOUR SEASONS
CONDENSER /PARALLEL

STANDARD IGN
ABS SENSOR HARNESS

FOUR SEASONS
SUCTION LINE HOSE ASSEMBL
DELPHI
CTRL ARM & BALL JNT ASSEM

FOUR SEASONS
DISCHARGE LINE HOSE ASSEM
STANDARD IGN
ABS SENSOR HARNESS
R/M BRAKES
BRAKE PAD SET

FOUR SEASONS
SUCTION LINE HOSE ASSEMBL

FOUR SEASONS
NEW COMPRESSOR

DELPHI
ABS SPEED SENSOR

FOUR SEASONS
NIPPONDNESO 7SB16C COMPR

DELPHI
SUSP CTRL ARM

FOUR SEASONS
PLATEFINEVAPORATORCORE

FOUR SEASONS
NIPP 7SEU16C COMP W/CLUT

FOUR SEASONS
COOLANT PUMP

FOUR SEASONS
NIPPONDENS 6SEU16C CMPRSR

DELPHI
CTRL ARM

DEA PRODUCTS
TRANSMISSION MOUNT
R/M BRAKES
BRAKE PAD SET
FOUR SEASONS
COMPLETE A/C KIT

FOUR SEASONS
BLOWER MOTOR

DELPHI
CRANKSHAFT SENSOR
DELPHI
CTRL ARM

DELPHI
ABS SPEED SENSOR

DELPHI
OXYGEN SENSOR

DELPHI
CONTROL ARM AND BALL JOINT ASSEMBLY

DELPHI
CONTROL ARM AND BALL JOINT ASSEMBLY

FOUR SEASONS
RMFG DCW17B
STANDARD IGN
CLOCK SPRING

FOUR SEASONS
PRESSURE SWITCH
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