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.
Mahle
AUDI 1.8L AEB 1997-2000 (M11 X 1.5mm X 96mm #9 Torx)

Dorman
BREATHER TUBE

Victor Reinz
Engine Cylinder Head Gasket - 61-31875-00

Mahle
AUDI VW 3.0L 3.2L DOHC 24V 2005-2012

Hella
WATER PUMP

Mahle
Oil Pan Gasket AUDI 2771CC 2.8L SOHC 12V AFC 1995-1998

Denso
AIR FILTER

Bosch
OIL FILTER

Mahle
~(0 lbs. 7X7X0)~ Volkswagen ABA SOHC 2.0L 1994-1999
Bosch
OIL FILTER

Clevite
GASKETS
Clevite
AUDI / VOLKSWAGEN MULTIPLE APPLICATIONS 19962013 EXHAUST PIPE GASKET

Mahle
~(0.4 lbs. 24X6X0)~ 49-56 GM V8 324cid 317cid 303cid

Mahle
Intake Manifold Set Audi:9090 Quattro100100 Quattro w 2771ccAAH V6 Eng.(92-95)(int)

Gates
Gates Radiator Cap Tester Adapter
Clevite
SLEEVE ASSEMBLY RING SET

Stoptech
Stoptech PQ Pro Brake Pads Rear Alfa Romeo Audi 100 100 Quattro 164 200 200 Quattro 4000 Quatt

NGK
ENGINE CAMSHAFT POSITION SENSOR

Mahle
~(0.2 lbs. 16X6X0)~ VW-PASS 1.8L 20VALVE DOHC TURBO 1998-2003

Bosch
DISC BRAKE PADS

Dorman
CRANK CASE BREATHER

Bosch
DISC BRAKE PADS
Dorman
CONTROL ARM
Clevite
A/C BLOWER REGULATOR AND RESISTOR

Clevite
SLEEVE ASSEMBLY RING SET

Hella
DISC BRAKE ROTOR

Victor Reinz
Engine Crankshaft Seal Kit - 81-90010-00

Clevite
TURBOCHARGERS

Mahle
AUDI/VW 1.4L AND 2.0L 2015-2018 Exhaust Manifold Gasket

Clevite
EXHAUST VALVE

Stoptech
BRAKE HOSE

Stoptech
BRAKE HOSE

Clevite
INTAKE VALVE

Dorman
BREATHER TUBE

Mahle
Oil Pan Set AUDI VW 2.8L DOHC V6 30V 1997-2005
Mahle
~(0.1 lbs. 8X5X0)~ Timing Cover Gasket 14-17 Audi/VW 1.8L/2.0L

Clevite
EXPANSION VALVE AND ORIFICE TUBE

Stoptech
BRAKE HOSE

Stoptech
BRAKE HOSE
Hella
SENSOR WHEEL SPEED

Mahle
VW AUDI 2771CC 2.8L DOHC 30V 1997-2005
Mahle
VW 2.0L TURBO BPY 2006-2008 CCTA 2008 CBFA 2008

King Engine Bearings
FOR AUDI AUK BKH BYU

Hella
SENSOR CAMSHAFT POSITION

Stoptech
PREMIUM SWAY BAR BUSHING KIT

Bosch
SPARK PLUG

Bosch
GASOLINE INJECTOR
Mahle
~(0 lbs. 6X4X0)~ Volkswagen / BMW

Mahle
Valve Cover Gasket VW 1984cc 2.0L Turbo L4 BPY 2006-2007
Hella
OIL PRESSURE SWITCH VAG
Mahle
Audi:1.5L1.6L1.7L1.8L1.9L2.0L(70-91) VW:1.51.6L(73-85)1.8L(84-88)

Mahle
Sleeve Assembly Ring Set Volkswagen PISTON RING SET-LV-Piston Ring Set-PISTON RING SET

Mahle
Sleeve Assembly Ring Set PISTON RING SET-LV-Piston Ring Set-PISTON RING SET
Mahle
Sleeve Assembly Ring Set Volkswagen PISTON RING SET-LV-Piston Ring Set-Piston ring set

Dorman
CONTROL ARM

Bosch
DISC BRAKE PADS

Dorman
CONTROL ARM
Stoptech
BRAKE HOSE

Stoptech
BRAKE HOSE

Magnaflow
Connector - 87-10 Audi VW 57mm x 125mm
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