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
PIGTAIL OR SOCKET

Dorman
DISC BRAKE HDW KIT

Dorman
VVT SOLENOID
Dorman
STABILIZER BAR LINK

AP Exhaust Products
MOUNT RUBBER
Cloyes Gear & Products
ENGINE OIL PUMP CHAIN TENSIONER

WIX
CABIN AIR FILTER
Dorman
STABILIZER BAR LINK
Dorman
STABILIZER BAR LINK
Dorman
STABILIZER BAR LINK

Dorman
COOLANT LINE

AP Exhaust Products
MOUNT RUBBER
Dorman
STABILIZER BAR LINK

WIX
OIL FILTER

Dorman
BRAKE HOSE

Dorman
OIL LEVEL DIP STICK

Dorman
OIL FILTER CAP

Dorman
HOOD INSULATION RET

Dana
HEAD GASKET SET

WIX
OIL FILTER

Dorman
VW PCV DIAPHRAGM

Dorman
OIL FILTER CAPS

Dorman
CRANKSHAFT SENSOR

Dorman
RACK BELLOW

Dorman
CALIPER REPAIR KIT

WIX
AIR FILTER MIN ORDER QTY1

Dorman
BUSHING
Cloyes Gear & Products
DRIVE BELT PULLEY

Dorman
DISC BRK GUIDE BOLT/

Dorman
BRAKE HOSE

WIX
FUEL FILTER MIN ORDER QTY12

Brembo
MERCEDESBENZ A250 20192019 DISC BRAKE PAD SET

AP Exhaust Products
SLEEVE

Cloyes Gear & Products
ENGINE OIL PUMP CHAIN TENSIONER
Fel-Pro
OIL PAN GASKET SET
Dorman
TPMS SENSOR

Dana
ENGINE VALVE COVER GASKET SET

Dana
VALVE COVER GASKET SET
AP Exhaust Products
0913 FORESTER/9802 PASSPORT EXHAUST FLANGE GASKET

Champion Race Plugs
PLATINUM POWER SPARK PLU

Cloyes Gear & Products
BELT IDLER PULLEY

Dorman
BRAKE HOSE

Dana
ENGINE CYLINDER HEAD BOLT SET

Dana
ENGINE HEAD GASKET

Dana
ENGINE HEAD GASKET

Dana
ENGINE CYLINDER HEAD BOLT SET

Dana
ENGINE CYLINDER HEAD BOLT SET

Dana
ENGINE HEAD GASKET

Dana
ENGINE HEAD GASKET

Ferrea Racing
Ferrea VW 2.0T FSI Single Spring 7 Deg Pro CNC Titanium Retainer - Single

Cipa
SPECTRAS H1 BLUE BULBS
WIX
OIL FILTER

Ferrea Racing
Ferrea Audi/VW 1.8T 20V/2.7T 30V Intake Spring Seat Locators - Set of 6 (For S10056)
Cloyes Gear & Products
ENGINE TIMING CHAIN GUIDE
Cloyes Gear & Products
BELT IDLER

Dorman
WATER OUTLET

Dorman
BRAKE PAD WEAR SENSOR

Dorman
CAMSHAFT SENSOR

Dorman
CALIPER REPAIR KIT
Dorman
RETAINER FITS 24MM HEX
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