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 Category:exterior components Parts
2182 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.
WOLF PROD.
VELOURMAT CUSTOM DASH COVER BY DASH
WOLF PROD.
DASH BOARD COVER

Walker Products Inc. - Sensors
ENGINE CRANKSHAFT POSITION SENSOR
DAYCO HYDRAULIC
TIMING BELTS

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR

Walker Products Inc. - Sensors
IGNITION KNOCK (DETONATION) SENSOR

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR
Walker Products Inc. - Sensors
ENGINE OIL PRESSURE SWITCH

TRAKMOTIVE
NEW CV AXLE

Walker Products Inc. - Sensors
SPARK PLUG WIRE SET

MOTORAD
ENGINE OIL FILTER CAP

MOTORAD
ENGINE OIL FILTER CAP

Walker Products Inc. - Sensors
OXYGEN SENSOR

Walker Products Inc. - Sensors
OXYGEN SENSOR

MOTORAD
ENGINE OIL FILTER CAP

WAGNER BRAKE
BRAKE ROTOR
DAYCO HYDRAULIC
NO SLAK IDL/TNSINRS PLLY

Walker Products Inc. - Sensors
OXYGEN SENSOR
Walker Products Inc. - Sensors
IGNITION KNOCK (DETONATION) SENSOR

Goodyear
ACCESSORY DRIVE BELT IDLER PULLEY FEADIDLER PULLEY
TRICO
WIPER REFILL

Walker Products Inc. - Sensors
MANIFOLD ABSOLUTE PRESSURE SENSOR

MOTORAD
IGNITION COIL

Walker Products Inc. - Sensors
OXYGEN SENSOR

Walker Products Inc. - Sensors
OXYGEN SENSOR

MOTORAD
TERMOSTATO

MOTORAD
THERMOSTAT & HOUSING
WOLF PROD.
SIGNATURE AUDI A5
WOLF PROD.
DASH BOARD COVER

TRICO
13" TRICO EXACT FIT WIPER

WAGNER BRAKE
CERAMIC DISC PAD SET
WOLF PROD.
DASHMAT CUSTOM DASH COVER

WOLF PROD.
DM AUDI A4

TRAKMOTIVE
NEW CV AXLE
WOLF PROD.
SIGNATURE AUDI A5

MOTORAD
IGNITION COIL

Walker Products Inc. - Sensors
ENGINE CAMSHAFT/CRANKSHAFT POSITION

MOTORAD
VAPOR CANISTER PURGE SOLENOID

MOTORAD
VAPOR CANISTER PURGE SOLENOID
Race Sport
3157 NORAPID FLASH CANBUS TURN SIGNAL LED BULBSSWITCHBACK VERSION IN WHITE/AMB

Walker Products Inc. - Sensors
ENGINE CRANKSHAFT POSITION SENSOR
TRAKMOTIVE
POWER REGULATOR ONLY

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR
WOLF PROD.
DASH BOARD COVER
TRICO
TRICO EXACT FIT FACTORY REPLACEMENT

WOLF PROD.
SM 17-18 AUDI A4
Goodyear
SERPENTINE BELT MULTI VBELTK MULTI VBELT

MOTORAD
ENGINE CAMSHAFT POSITION SENSOR

WOLF PROD.
DASH BOARD COVER
Rain-X
RX TRANSPARENCY+ 22' 5X1EA

TRICO
BEAM WIPER BLADE
STANDARD IGN
COIL ON PLUG COIL

MONROE SHOCKS & STRUTS
STRUT-MATE MOUNTING KITS

WOLF PROD.
DASH BOARD COVER

STRONG ARM
TRUNK LID LIFT SUPPORT

WAGNER BRAKE
SEMI-MET BRAKE PADS

STRONG ARM
TAILGATE LIFT SUPPORT
WOLF PROD.
DASH BOARD COVER

WOLF PROD.
DSM

STRONG ARM
TAILGATE LIFT SUPPORT
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