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
ABS SENSOR HARNESS

Extreme Dimensions
2008-2015 Lexus LX570 Urethane AF-1 Wide Body Door Caps ( PUR-RIM ) - 4 Piece (S)
Extreme Dimensions
2006-2008 Audi A4 B7 Carbon Creations DTM Look Front Under Spoiler Air Dam Lip Splitter - 1 Piece

WAGNER BRAKE
SEMI-MET BRAKE PADS

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 Audi A4 / S4 Wagon A5 S5 RS5 Cabrio. (B8) 2WD 4WD Adjustable Lowering Springs

STANDARD IGN
DIVERTER VALVE
STANDARD IGN
DIVERTER VALVE
WOLF PROD.
LE AUDI A4

WAGNER BRAKE
SEMI-MET DISC PAD SET
Extreme Dimensions
2006-2008 Audi A4 B7 4DR Duraflex DTM Look Rear Bumper Cover - 1 Piece

MOTORAD
ENGINE CRANKSHAFT POSITION SENSOR
Extreme Dimensions
2006-2008 Audi A4 S4 B7 Carbon Creations OEM Look Hood - 1 Piece

TRAKMOTIVE
CV AXLE SHAFT

TRAKMOTIVE
ALL NEW CV AXLE

Suspension Techniques
ST XA Adjustable Coilovers 2018+ Audi A4/S4/A5 (B9) Sedan Quattro w/o Electronic Dampers

Suspension Techniques
ST 2017+ Audi A5 (B9) Sportback Quattro XA Height & Rebound Adjustable Coilover Kit 0.4in-1.4in
MOTORAD
KNOCK SENSOR
MOTORAD
VAPOR CANISTER

Suspension Techniques
ST XA-Height/Rebound Adjustable Coilovers 96-01 Audi A4 (8D/B5) Quattro Sedan/Wagon 1.8T

Suspension Techniques
ST XA-Height Adjustable Coilovers Audi A4 (8E/B6-B7)

Walker Products Inc. - Sensors
MANIFOLD ABSOLUTE PRESSURE SENSOR

DAYCO HYDRAULIC
WATER PUMP

TRAKMOTIVE
CV AXLE SHAFT

Suspension Techniques
ST 12-18 Audi A6/A7 (C7/4G)/09-16 A4/S4 (B8) 2WD/4WD Adjustable Lowering Springs

Goodyear
SERPENTINE BELT TENSIONER FEADTENSIONER

Walker Products Inc. - Sensors
OXYGEN SENSOR

Suspension Techniques
ST Coilover Kit 96-01 Audi A4 Quattro (8D/B5) Sedan/Wagon / 00-01 Audi S4 (8D/B5) Sedan

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

Walker Products Inc. - Sensors
OXYGEN SENSOR
DAYCO HYDRAULIC
RADIATOR HOSE
Extreme Dimensions
2006-2008 Audi A4 S4 B7 Duraflex RS4 Wide Body Front Bumper Cover - 1 Piece
Walker Products Inc. - Sensors
ENGINE CRANKSHAFT POSITION SENSOR
TRAKMOTIVE
DRIVE SHAFT

Walker Products Inc. - Sensors
MASS AIR FLOW SENSOR
TRAKMOTIVE
ALL NEW CV AXLE

TRAKMOTIVE
CV AXLE SHAFT

TRAKMOTIVE
NEW CV AXLE

TIMKEN
PRESET PREGREASED PRESEALED BRG M

TRAKMOTIVE
CV AXLE SHAFT

Suspension Techniques
ST XA-Height Adjustable Coilovers 17+ Audi A4 (B9) Sedan 2WD - W/O Elec. Dampers - 50mm

Suspension Techniques
ST XA-Height/Rebound Adjustable Coilovers 02-08 Audi A4 (8E/B6-B7) Wagon Quattro

Suspension Techniques
ST XTA Adjustable Coilovers Audi A4 (B8) Wagon 4WD

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

TRAKMOTIVE
NEW CV AXLE

TRAKMOTIVE
NEW CV AXLE

WAGNER BRAKE
SEMI-MET BRAKE PADS

WAGNER BRAKE
CERAMIC BRAKE PADS
Extreme Dimensions
2020-2023 Audi A4 S4 Duraflex Elver Front Lip Spoiler Air Dam - 1 Piece

WAGNER BRAKE
H.I.D REPLACEMENT BULB

Extreme Dimensions
2006-2008 Audi A4 B7 4DR Duraflex DTM Look Body Kit - 4 Piece - Includes DTM Look Front Bumper Cover (105035) DTM Look Rear Bumper Cover (105037) R-1 Side Skirts Rocker Panels (100290)

STANDARD IGN
INTRMTR RELAY

TRAKMOTIVE
ALL NEW CV AXLE
REMY
REMANUFACTURED ALTERNATOR
REMY
REMANUFACTURED ALTERNATOR

TRAKMOTIVE
ALL NEW CV AXLE

TRAKMOTIVE
NEW CV AXLE

TRAKMOTIVE
NEW CV AXLE

WAGNER BRAKE
CERAMIC DISC 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