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.

Gates
Gates Super HC Narrow Section Molded Notch V-Belt
Mahle
Engine Piston Ring Set 42081CP.040

Hella
OIL PUMP
Carrillo
VW_BTSI_3HS_5670B6S

JE Pistons
VLKSWGN 1.8T 5V DISHED -7CC 81MM

Gates
Gates Steel Smooth/Backside (59 mm x 12 mm x 31 mm) - Flanged

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

JE Pistons
VW 2.0T FSI 20MM PIN 83.5MM 10.0 FS

JE Pistons
VW 1.8T 20V 20MM PIN 82MM 9.25 FSR
Clevite
VW 2.7L AND 2.8L ATQ AHA APB & BEL 19982004 (M11 X 1.5MM X 133MM) CYLINDER HEA
JE Pistons
VOLKSWAGON 2L ABF 8CC DOME 1.204X3.

Gates
Gates Steel Smooth/Backside (59 mm x 10 mm x 34 mm)

Gates
Gates Steel Smooth/Backside (72 mm x 8 mm x 32 mm) - W/Bolt Bushing 2 Washers

JE Pistons
MITSUBISHI 4G63 7-BOLT 1.9CC DOME 1

Hella
VACUUM PUMP BRAKING SYSTEM 8TM
JE Pistons
SUBARU FA20 DIRECT INJECTION 2.0L -

Mahle
Radiator

King Engine Bearings
FOR AUDI ACZ AAH ACK. AEJ ASN

JE Pistons
VW 2.0T FSI 83.0 KIT

Gates
Gates Electric Engine Water Pump

Mahle
2008-2014 VW Audi 2.0L gas

Bosch
CAMSHAFT SENSOR

JE Pistons
VW 1.8T 20V KIT 81.5

JE Pistons
VW TS1 2.0T TSI 22MM PIN 82.5MM 10
JE Pistons
VW 2.0T TSI 21M PIN 83.5MM 10.0
JE Pistons
VW 1.8T 20V 20MM PIN 83MM 8.5 FSR

Mahle
Engine Piston Ring Set 315-0109.005

JE Pistons
MIT 4B11 EVO X 2008+, 86MM BORE, -9
JE Pistons
VW 1.8T 20V KIT 82.0
Gates
Gates Performance Engine Water Pump
JE Pistons
UX 83.00MM 1.0/1.2/2.8 DLC

Gates
Gates Steel V-Ribbed 6 Grooved (56 mm x 16 mm x 42 mm) - Flanged w/ Dust Cap
JE Pistons
UX 82.00MM 1.0/1.2/2.8 DLC
JE Pistons
AUDI 1.8T 8.5:1 KIT
JE Pistons
AUDI 1.8T 9.25:1 KIT

JE Pistons
VW 2.0T FSI 10.5 KIT

Mahle
~(2 lbs. 6X4X4)~ Audi 2.0L CAGA CAGB CAGC CAHA CAHB CBAA CBAB CBBB CMEA (0.25MM) Piston With Rings

Mahle
~(2 lbs. 6X4X4)~ Audi 2.0L CAGA CAGB CAGC CAHA CAHB CBAA CBAB CBBB CMEA Piston With Rings
JE Pistons
AUDI 1.8T 9.25:1 KIT

JE Pistons
FORD -5CC FLAT TOP 1.230 X 4.000
Mahle
~(1 lbs. 5X4X4)~ Audi VW 2.0L (CAEBCAWBCBFACCTACCZACCZCCDNBCDNC) STD

JE Pistons
VW2.0T FS1 10.3:1 KIT

JE Pistons
CHEVROLET 350/383 -2CC DOME 1.125 X

King Engine Bearings
FOR AUDI ABS CDTA CKVC CEZA SPUT

JE Pistons
FORD -5CC FLAT TOP 1.230 X 4.020
JE Pistons
FORD -5CC FLAT TOP 1.280 X 4.005

JE Pistons
FORD -5CC FLAT TOP 1.230 X 4.010

JE Pistons
VW 2.0T FSI 10.5 KIT

Dorman
TIMING BELT TENSION

Dorman
TIMING BELT ADJUSTER

JE Pistons
VLKSWGN 1.8L DISH -12.5CC 9:1 82MM
JE Pistons
WISECO BMW M20B25 2.5 LTR 12V 6 CYL

JE Pistons
VW 2.0T TSI 23MM PIN 83MM 9.6
JE Pistons
VW 20V DISHED -14CC 1.1614 X 3.2283
JE Pistons
VW 2.0T TSI ULTRA SERIES 23MM PIN

JE Pistons
VW 2.0T FSI 83.5 KIT
JE Pistons
AUDI/VW EA113 -12.2CC DISH 1.1654 X
JE Pistons
VW 1.8T 20V KIT 82.5
JE Pistons
AUDI/VW EA113 -11.5CC DISH 1.1654 X

Gates
Gates 4 Components (1 Belt 1 Tensioner 1 Hydraulic Tensioner w/Pulley Attached 1 Water Pump w/Plastic I
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