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.
034Motorsport
MAIN BEARING SET,AUDI V6COATE

034Motorsport
Radiator Support Cover, CF, B9

Mahle
Mahle Engine Piston 033 21 01

Mahle
Mahle Engine Piston 033 04 00
Mahle
Mahle Engine Piston 033 98 01

Mahle
Mahle Engine Piston 030 65 02

Carrillo
Carillo Audi/VW 1.8L 20 Valve 20mm pin 81mm 9.5:1 - SC7610

Mahle
Mahle Engine Crankshaft Main Bearing Set MS-2279H

Mahle
Mahle Engine Piston 034 94 02

STANDARD IGN
ENGINE OIL LEVEL SENSOR

STANDARD IGN
ENGINE OIL LEVEL SENSOR

DAYCO HYDRAULIC
TIMING ACTUATOR DAYCO
DAYCO HYDRAULIC
BALANCER

DAYCO HYDRAULIC
WATER PUMP KIT DAYCO

MOTORAD
ENGINE OIL FILLER CAP

Walker Products Inc. - Sensors
ENGINE VARIABLE VALVE TIMING (VVT)
Stainless Steel Brakes
TRI-POWER QUICK CHANGE

DAYCO HYDRAULIC
WATER PUMP KIT
DAYCO HYDRAULIC
WATER PUMP AND TIMIMG BELY KIT

DAYCO HYDRAULIC
WATER PUMP KIT
DAYCO HYDRAULIC
WATER PUMP BELT AND TENSI

DAYCO HYDRAULIC
BELT TENSIONER AND IDLER

Goodyear
SERPENTINE BELT TENSIONER FEADTENSIONER

Goodyear
SERPENTINE BELT TENSIONER FEADTENSIONER
Walker Products Inc. - Sensors
ENGINE CRANKSHAFT POSITION SENSOR

STANDARD IGN
INTERMOTOR VARIABLE VALVE TIMING SO
STANDARD IGN
VVT CHAIN TENSIONER
STANDARD IGN
VARIABLE VALVE TIMING SOLENOID

STANDARD IGN
VVT SOLENOID

STANDARD IGN
CRANK SENS

DELPHI
CRANKSHAFT SENSOR
ATK ENGINES
VW 1.8T 01-06 CYL HEAD

DELPHI
MAF SENSOR - PROBE ONLY
Edge Autosport
STAGE 2 KITS
Scat
AUDI/VW PRO SPORT H-BEAM

Scat
AUDI/VW PRO SPORT HBEAM CONNECTING RODS ARP 2000 3/8IN CAP SCREWS 6.457 ROD LENGTH 2.125 CRANK PIN
Derale
TIMING KIT' 99 - 05 AUDI / VOLKSWAG
Dorman
CAM PHASER

Ferrea Racing
Ferrea VW 2.0T TS Single Spring 7 Deg Pro CNC Intake Titanium Retainer - Set of 8
Ferrea Racing
Ferrea Audi/VW 1.8T 20V Single Spring 7 Deg Pro CNC Intake Titanium Retainer - Set of 12
Dorman
HARMONIC BALANCER ASSEMBLY

Dorman
VVT SOLENOID

Dorman
VVT SOLENOID

Dorman
VVT SOLENOID

Dorman
VVT SOLENOID

Dorman
VARIABLE VALVE TIMING SOLENOID

Dorman
OIL FILTER CAP

WIX
OIL FILTER MIN ORDER QTY1

Dorman
VALVE TIMING SOLENOID

Dorman
VARIABLE VALVE TIMING SOLENOID

Ferrea Racing
Ferrea VW VR6 R32 30.20mm 5.96mm 136.48mm 25 Deg Taper Flo Stk Super Alloy Exhaust Valve - Set of 6

Ferrea Racing
Ferrea VW 1.8T 20V 26.9mm 5.97mm 105.1mm 24 Deg S-Flo Stk Grv Comp Plus Intake Valve - Set of 12
Dorman
HARMONIC BALANCER

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

Ferrea Racing
Ferrea VW 2.0T TSI F5134.9mm 5.98mm 20 Deg S-Flo +1mm Trpl Grv Comp Plus Intake Valve - Set of 8
Dorman
TIMING COVER

Dorman
TIMING COVER

Dorman
TIMING COVER

Ferrea Racing
Ferrea 09-13 Audi 2.0L TFSI Single Spring Kit
Ferrea Racing
Ferrea 06-08 Audi 2.0L FSI Single Spring Kit
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