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.

Clevite
AUDI 2976CC 3.0L AVK BGN 20022006 CYLINDER HEAD GASKET
Bosch
PIVOT 1504A HANDLE
Clevite
INTAKE VALVE

Stoptech
BRAKE PAD SENSOR WIRES

Mahle
Mahle Oil Filter Audi Allroad 4.2l 2003-2005 A8 S8 4.2l 5.2l 2004 - 2005

Mahle
Audi 2.0L Turbo DOHC A3 A4 Quattro TT Quattro 2009

Clevite
AUDI / VOLKSWAGEN 1984CC 2.0L BPGBPYBWTCDMA 20052014 TIMING COVER SET

Mahle
BEHR Engine Coolant Thermostat

Dorman
CONTROL ARM

Mahle
BEHR ThermostatInsert VW 2.8L AHA ATQ
Torque Solution
Torque Solution Thermal Throttle Body Gasket: Audi A4 Quattro 1997-2001

Dorman
OIL DRAIN PLUG M14-1.50
Bosch
GASOLINE INJECTOR

Mahle
Engine Connecting Rod Bearing Set 05-88 VKS 1.8L-2.0L CB-1426A(4)

ACL
ACL Bearings VW 4 1595-1781-1984cc 1983 on STD

Bosch
DISC BRAKE ROTOR

Clevite
TURBOCHARGER MOUNTING GASKET SET
Dorman
FLUID RESERVOIR
Mahle
AUDI 3.2L BKH 2005-2009
Mahle
~(0 lbs. 96X4X4)~ Turbo Oil Drain AUDI / VOLKSWAGEN 1781CC 1.8L 2671CC 2.7L 1999-2006

Clevite
AUDI 1.8L AEB 19972000 (M11 X 1.5MM X 96MM #9 TORX) CYLINDER HEAD BOLTS
Mahle
~(0.1 lbs. 13X9X0)~ 2002-1998 VW 5 Speed Rear Cover Passat and A4
Clevite
AUDI / VOLKSWAGEN 2771CC 2.8L AHA 19971999 EXHAUST MANIFOLD SET

Clevite
AUDI / VOLKSWAGEN 2.7L 2.8L 20002005 TIMING COVER SET

Mahle
AIR FILTER ELEMENT

Hella
DISC BRAKE ROTOR

Victor Reinz
Exhaust Pipe Flange Gasket - 71-15600-00
Clevite
VW 1984CC 2.0L TURBO L4 BPY 20062007 VALVE COVER GASKET
SPYDER
0417 AUDI COMPLETE LICENSE PLATE BULB ASSEMBLY REPLACEMENT WHITE 5500K 1 PAIR

Stoptech
Stoptech PQ Pro Brake Pads Rear Audi Bentley Volkswagen A6 Quattro A8 Quattro Continental Phaet

Hella
WATER PUMP HEADLIGHT ... FOR SEAT/

Hella
OILPRESSURE SWITCH

Hella
OIL PRESSURE SWITCH
Clevite
THERMOSTAT HOUSING GSKT.

Bosch
SWITCH TOGGLE

Bosch
PRESSURE SENSOR

Hella
LAMBDA PROBE
Mahle
~(0.8 lbs. 24X8X0)~ Cylinder Head Gasket 13-17 AUDI/VW 1.8L/2.0L CPLACPPACNTCCYFBCYNBCPKACPRACXBACXBB

Mahle
Audi VW Applications W ZF 5HP19FL Transmission

Bosch
CABIN AIR FILTER

Hella
BRAKE PAD SET DISC BRAKE

Mahle
AUDI 3.2L DOHC 24V BKH 2005-2006
Mahle
AUDI/VW 1.8L AND 2.0L 2013-2018 TURBOCHARGED Thermostat Housing Gasket

Mahle
~(0.2 lbs. 16X6X0)~ Intake Manifold Gasket 13-17 Audi/VW 1.8L/2.0L
Clevite
AUDI 3123CC 3.2L BKH 20052009 VALVE COVER GASKET (RIGHT)

Mahle
HVAC Pressure Switch

Hella
CRANKSHAFT SENSOR

Hella
LAMBDA SENSOR 6PA

Victor Reinz
Engine Cylinder Head Gasket - 61-33120-40

Hella
SENDER UNIT INTAKE AIR TEMPERATURE

Denso
DOUBLE PLATINUM

Mahle
BEHR ThermostatInsert Audi Volkswagen 2.0L 1984cc Turbocharged 2009-2014

Magnaflow
Flange Gasket - 76-09 Audi Pontiac VW Volvo
Bosch
DISC BRAKE PADS

Mahle
AUDI VOLKSWAGEN 2771CC 2.8L AHA 1997-1999
Clevite
EXHAUST VALVE

Stoptech
GCX ROTOR WITH FULL COATING AND HIG

Dorman
TPMS VALVE CORE KIT
Clevite
AUDI 3.2L DOHC 24V BKH 20052006 WATER OUTLET GASKET

Mahle
~(1 lbs. 8X8X4)~ AUDI / VW 3.0L 3.2L DOHC 24V 2005-2012
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
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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