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
8072 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

STANDARD IGN
COIL ON PLUG COIL

FOUR SEASONS
IDLER PULLEY
STANDARD IGN
INTRMTR SNSR-SPEED

STANDARD IGN
INTRMTR SNSR-SPEED

DELPHI
CTRL ARM & BALL JNT ASSEM

R/M BRAKES
BRAKE PAD SET

PACE INT'L
PREMIUM PRO SERIES 18GBPS BANDWIDTH

DELPHI
ABS SPEED SENSOR

DELPHI
ENGINE CAMSHAFT POSITION SENSOR

DELPHI
CTRL ARM & BALL JNT ASSEM
PROGRESS INT
FRESH FOOD CHOPPER

DELPHI
STABILIZER BAR LINK

STANDARD IGN
CAMSHAFT SENSOR CONNECTOR

STANDARD IGN
MULTI FUNCTION CONNECTOR

DELPHI
STABILIZER BAR LINK

DELPHI
SUSPENSION STABILIZER BAR BUSHING K

DELPHI
STEERING TIE ROD ASSEMBLY

DELPHI
STEERING TIE ROD ASSEMBLY

DELPHI
CTRL ARM BUSHING

STANDARD IGN
CRANKSHAFT SENSOR

DELPHI
ABS WHEEL SPEED SENSOR

DELPHI
CTRL ARM BUSHING

STANDARD IGN
CAMSHAFT SENSOR

DELPHI
SUSPENSION STABILIZER BAR BUSHING K

DELPHI
CTRL ARM & BALL JNT ASSEM

R/M BRAKES
BRAKE PAD SET

DELPHI
VEHICLE SPEED SENSOR

FOUR SEASONS
BLOWER MOTOR

DELPHI
ENGINE CAMSHAFT POSITION SENSOR

FOUR SEASONS
WATER OUTLET

FOUR SEASONS
BLEND ACTUATOR

DELPHI
ENGINE CRANKSHAFT POSITION SENSOR

DELPHI
SUSP CTRL ARM & BALL JNT ASSEM

STANDARD IGN
INTERMOTOR SWITCH - POWER

DELPHI
CTRL ARM & BALL JNT ASSEM

FOUR SEASONS
DESSICANT BAG KIT

DELPHI
BALL JNT

FOUR SEASONS
ORIFICE TUBE

DELPHI
SUSPENSION STABILIZER BAR LINK KIT
LEBRA
AUDI A4 96-99

FOUR SEASONS
COOLANT TEMP SENSOR

FOUR SEASONS
COOLANT TEMP SENSOR
FOUR SEASONS
HARNESS CONNECTOR

FOUR SEASONS
FILTER DRIER DESSICANT BA
CARTER
FUEL PUMP TANK SEAL

FOUR SEASONS
COOLANT TEMP SENSOR

DELPHI
SUSP CTRL ARM

DELPHI
SUSP CTRL ARM

FOUR SEASONS
SENSOR
R/M BRAKES
BRAKE PAD SET

STANDARD IGN
INTERMOTOR VALVE - CANIST

FOUR SEASONS
HOSE ASSY /SUCTION
FOUR SEASONS
ACCUMULATOR

DELPHI
ENGINE CAMSHAFT POSITION SENSOR

DELPHI
SUSP STABILIZER BAR LINK

DELPHI
SUSP CTRL ARM
DELPHI
SUSP CTRL ARM

R/M BRAKES
BRAKE PAD SET

DEA PRODUCTS
MOUNT TRANS

R/M BRAKES
BRAKE PAD SET
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