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 Category:engines and components Parts
763 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

Ferrea Racing
Ferrea VW 2.0T FSI Single Spring 7 Deg Pro CNC Titanium Retainer - Set of 16

Cloyes Gear & Products
ENGINE TIMING CHAIN KIT

Cloyes Gear & Products
ENGINE TIMING CHAIN KIT

Cloyes Gear & Products
ENGINE TIMING CHAIN KIT

Ferrea Racing
Ferrea Audi 2.0T FSI 16V Single Valve Spring - Set of 16

Cloyes Gear & Products
ENGINE TIMING CHAIN KIT

JE Pistons
VW TS1 2.0T TSI 22MM PIN 83.5MM 10

JE Pistons
VW TS1 2.0 23MM PIN 82.5MM 9.6
JE Pistons
VW 2.0T FSI 20MM PIN 83MM 9.25 FSR
JE Pistons
VOLKSWAGEN 1.8T 5V -7CC DISH 81.00M

JE Pistons
VW 1.8T 20V 20MM PIN 82.5MM 8.5 FSR

JE Pistons
VW 1.8T 20V 20MM PIN 82.5MM 8.5 FSR

JE Pistons
VW 1.8T 20V 20MM PIN 82MM 8.5 FSR
JE Pistons
VW 2.0T FSI 83.5 KIT

JE Pistons
VW 2.0T FSI 82.5 KIT

Dorman
OIL PAN

Dorman
OIL PAN

JE Pistons
VW 2.0T TSI ULTRA SERIES 23MM PIN

JE Pistons
VW 2.0T TSI 23MM PIN 83.5MM 10.0 FS
JE Pistons
VW 2.0T TSI 23MM PIN 83.5MM 10.0

JE Pistons
VW TS1 2.0L TURBO 23MM PIN

JE Pistons
VW 2.0T TSI ULTRA SERIES 23MM PIN

JE Pistons
VW 2.0T TSI ULTRA SERIES 21MM PIN
JE Pistons
VW 1.8T ULTRA SERIES

NGK
EN VAR TIME SOLENOID
Mahle
Head Set AUDI 2976CC 3.0L AVK BGN 2002-2006
JE Pistons
FORD 302 BLOWER/TURBO -18CC DISH
Gates
Gates 4 Components (1 Belt 1 Tensioner 1 Idler 1 Water Pump) - Includes Gasket
Gates
Gates Hydraulic Type - Steel Smooth/Backside (65 mm x 10 mm x 33 mm) - W/Bushing Bolt Washer
Gates
Gates Hydraulic Cylinder Type - No Pulley Attached
Gates
Gates Steel Smooth/Backside (28 mm x 9 mm x 29 mm)

JE Pistons
VW TS1 2.0 TURBO KIT

JE Pistons
SRP PRO 2618- SBF-4.135/1.090 CD/-1

Hella
SENSOR ENGINE OIL LEVEL FOR VW AUDI

NGK
NTK VV0059 VVT SOLENOID
JE Pistons
VW 1.8T 20V 8.5 KIT

JE Pistons
VW 2.0T FSI ULTRA SERIES 20MM PIN

Carrillo
Carillo Audi 2.5L TFSI (2017-19) 23mm pin Std Bore 82.5mm 10:1 - SC7635-SINGLE
Clevite
TURBOCHARGER-NEW
Gates
Gates K06 13/16in x 73 7/8in

Dorman
OIL PAN
JE Pistons
VW 2.0T FSI 82.5 KIT

JE Pistons
VW 1.8T 20V KIT 82.5

Mahle
Piston With Rings Audi 2.8L AFC O S 0.25MM R C 0.30MM
JE Pistons
VW 1.8T 20V KIT 81.0
Gates
Gates 3 Components (1 Belt 1 Tensioner 1 Idler)

Gates
Gates Hydraulic Cylinder Type - No Pulley Attached
JE Pistons
AUDI/VW EA113 -10.5CC DISH 1.1654 X
Clevite
PISTON WITH RINGS

JE Pistons
VW 1.8T ULTRA SERIES
JE Pistons
VOLKSWAGEN 1.8T 5V -7CC DISH 82.00M
JE Pistons
VLKSWGN 1.8T 5V DISHED -7CC 82MM
Carrillo
BH57-1075-040 GEN3 DODGE HEMI 3.957 BORE 4.080 STROKE 6.125 ROD .866 PIN. 03-08 5.7L HEAD 2.6CC 10.75:1 COMP.

JE Pistons
FORD -5CC FLAT TOP 1.230 X 4.020
Dorman
TIMING BELT ADJUSTER

Dorman
TIMING BELT ADJUSTER

JE Pistons
VW 1.8T 20V 20MM PIN 81.5MM 9.25FSR
JE Pistons
VW 20V DISHED -14CC 1.1614 X 3.2087
Gates
Gates Heavy-Duty Engine Water Pump
NGK
ENGINE CAMSHAFT POSITION SENSOR
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