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.

STANDARD IGN
ENGINE OIL LEVEL SENSOR

STANDARD IGN
ENGINE OIL LEVEL SENSOR
STANDARD IGN
FUEL INJECTOR MFI
STANDARD IGN
FUEL FEED LINE
STANDARD IGN
CAMSHAFT SENSOR
STANDARD IGN
FUEL INJECTOR

STANDARD IGN
VACUUM PUMP
STANDARD IGN
VACUUM PUMP

STANDARD IGN
INTERMOTOR BLOWER MOTOR R

STANDARD IGN
BLOWER MOTOR RESISTOR

STANDARD IGN
INTERMOTOR BLOWER MOTOR R

STANDARD IGN
BLWR MOTOR RESISTOR

STANDARD IGN
INTERMOTOR TURBOCHARGER - NEW - GAS

STANDARD IGN
ENGINE OIL LEVEL SENSOR CONNECTOR

G3 S.P.A
TRUNK BIKE RACK PREMIUM

Walker Products Inc. - Sensors
OXYGEN SENSOR

STANDARD IGN
INTERMOTOR FUEL INJECTION

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR
REMY
REMANUFACTURED ALTERNATOR
REMY
REMANUFACTURED ALTERNATOR
REMY
IMPORT ALTERNATOR
REMY
REMANUFACTURED ALTERNATOR

REMY
REMANUFACTURED STARTER
Extreme Dimensions
Universal Carbon Creations DriTech Vortex Canards - 4 Piece (S)
REMY
REMANUFACTURED ALTERNATOR
Extreme Dimensions
AUDI A4 OTG FRONT BUMPER

REMY
REMANUFACTURED ALTERNATOR

AKEBONO
Euro Ultra-Premium Brake Pads - Rear
Extreme Dimensions
2006-2008 Audi A4 S4 B7 Duraflex DTM Look Front Bumper Cover - 1 Piece

MOTORAD
EVAPORATIVE LEAK DETECTION PUMP

DAYCO HYDRAULIC
TIMING ACTUATOR DAYCO
STANDARD IGN
INTERMOTOR FUEL INJECTION
REMY
REMANUFACTURED ALTERNATOR

Extreme Dimensions
2009-2012 Audi A4 B8 4DR R-1 Rear Diffuser - 1 Piece

REMY
REMANUFACTURED STARTER

STANDARD IGN
LOCKS - IGNITION
DAYCO HYDRAULIC
BALANCER

Walker Products Inc. - Sensors
OXYGEN SENSOR

WAGNER BRAKE
SEMI-MET BRAKE PADS

MOTORAD
THERMOSTAT

REMY
IMPORT ALTERNATOR

TSW Alloy Wheels
~(28 lbs. 19X19X10)~ TSW SEBRING 17x8.0 5/114.3 ET40 CB76.1 SILVER W/ MIRROR CUT FACE

REMY
REMANUFACTURED ALTERNATOR

Walker Products Inc. - Sensors
OXYGEN SENSOR

Hidden Hitch
SPORTFRAME HITCH

DAYCO HYDRAULIC
WATER PUMP KIT DAYCO

REMY
REMANUFACTURED ALTERNATOR

Suspension Techniques
ST Sport-tech Suspension Kit Audi A4 (8E/B6-B7) Sedan Quattro

DAYCO HYDRAULIC
RADIATOR HOSE

TRAKMOTIVE
DRIVE SHAFT
MONROE SHOCKS & STRUTS
OESPECTRUM SHOCK ABSORBER

STANDARD IGN
INTRMTR FL INJ- MFI

MOTORAD
ENGINE OIL FILLER CAP
Suspension Techniques
SPORT SPRINGS
STANDARD IGN
FUEL INJECTOR

Walker Products Inc. - Sensors
OXYGEN SENSOR

Walker Products Inc. - Sensors
ENGINE VARIABLE VALVE TIMING (VVT)

STANDARD IGN
VACUUM PUMP
Stainless Steel Brakes
TRI-POWER QUICK CHANGE

Suspension Techniques
ST Coilover Kit 09-14 Audi A4/A4 Quattro (B8)
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