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.

Bosch
DISC BRAKE ROTOR

Mahle
Engine Oil Filter
Dorman
Steering Parts OEM: Control Arms
Stoptech
SEMI-LOADED CALIPER

Hella
BULB 12V 29/8W W3X16Q S8

Hella
SENSOR PARKING ASSIST

Victor Reinz
Engine Cylinder Head Gasket - 61-36390-00

Victor Reinz
Engine Cylinder Head Gasket - 61-37435-10

Bosch
DISC BRAKE PADS

Clevite
AUDI A4 1.8L 2.0L 2007> AUDI A5 1.8L 2007> AUDI Q5 2.0L TDI 20112012 MAHLE

Hella
SENSOR CRANKSHAFT VAG
Clevite
AUDI CABRIOLET A4 S4 20032007 ALLROAD 20012005 A6/S6 20012004 MAHLE CABIN

Mahle
Cabin Air Filter LA 1294

NGK
TURBOCHARGER BOOST SENSOR
Bosch
BUSHING

NGK
VEHICLE SPEED SENSOR

Hella
BRAKE PAD SET, DISC BRAKE

Gates
Gates 5/8in x 5/8in x 4 7/32in
Gates
Gates Engine Coolant Thermostat Seal

Mahle
AUDI VOLKSWAGEN 2771CC 2.8L ATQ 2000-2005

Hella
BRAKE PAD SET DISC BRAKE

Hella
SENDER UNIT INTAKE AIR TEMPERATURE

Hella
BRAKE PAD SET DISC BRAKE

Clevite
THERMAL PRODUCTS

Mahle
Engine Coolant Reservoir

Mahle
AUDI 1781CC 1.8L (AMB) 2004-2006

Clevite
THERMAL PRODUCTS

Hella
IGNITION COIL 4 PIN FOR AUDI/VW/SK

Dorman
STEERING TIE ROD END

Hella
CRANK SHAFT PULSE SENSOR

Gates
Gates 5/8in x 5/8in x 10 1/32in

Hella
DISC BRAKE PAD
Dorman
ELBOW HOSE

Bosch
BRUSH HOLDER
Clevite
SLEEVE ASSEMBLY RING SET

Bosch
CRANKSHAFT SENSOR

Stoptech
C-TEK Ceramic Brake Pads

Bosch
CRANKSHAFT SENSOR

Clevite
VOLKSWAGEN / AUDI 1984CC 2.0L CCTA CBFA CAED 20082014 REAR MAIN SEAL
Clevite
TURBOCHARGERS

Stoptech
Stoptech PQ Pro Brake Pads Front Audi Volkswagen A4 A4 Quattro Passat S3 1996 - 2000

Bosch
ROT.-SPEED SENSOR

Mahle
~(0.7 lbs. 6X4X4)~ ThermostatIntegral 05-09 Audi 3.2L V6
Clevite
PISTON PIN BUSHING
Bosch
DISC BRAKE PADS
Mahle
08-17 Audi/VW 1.8L/2.0L Vacuum Pump Moutning Gasket

Bosch
MAP SENSOR

Bosch
EL FIELD RHEOSTAT

Clevite
FILTER-DRIER AND ACCUMULATOR
Clevite
A/C SWITCH

Mahle
TURBOCHARGER MOUNTING GASKET SET 05-00 Volkswagen Passat 1.8L; 06-00 Audi A4 A4 Quattro 1.8L

Mahle
AUDI/VW 1.8LAND 2.0L 2013-2018 Cylinder Head Bolts

Mahle
AUDI VOLKSWAGEN 1.8L 2.7L 2.8L 3.0L 1997-2006
Gates
Gates Power Steering Repair Kit

Gates
COOLANT HOSE
Stoptech
BRAKE HOSE
Clevite
TIMING

Mahle
~(1.8 lbs. 5X3X2)~ VW-Pass 1.8L AWP AWV and APH 1999-2006 (M10 X 1.5 X 115mm 6 point #9 torx)
Mahle
Volkswagen ABA SOHC 2.0L 1993-2002

Mahle
Audi Volkswagen 1984cc 2.0L 2008-2014
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