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.

034Motorsport
Ctrl Arm Kit, Up Adj, CC,B9 S4

034Motorsport
Ctrl Arm Kit, Lwr,Stl Up,B5 C5

034Motorsport
CONTROL ARM KIT,UP ADJ,B8 TRA

034Motorsport
Ign Coil, 6pk, Ylw, MQB Style

034Motorsport
Hose, Turbo Inlet, A4, TT MAF

034Motorsport
ADAPTER,FUEL PUMP,39MM IN TAN

034Motorsport
INJECTOR ADAPTER,RS4 6INJECTO

034Motorsport
X34, Air Scoop, Lrg IC, B9 A4

034Motorsport
Wheel Spacer Set, 10mm-10mm, 6

034Motorsport
Mount,Trans,SD,A4 w- V6 H-WARE

034Motorsport
Stud-Nut, 65mm, Ball Seat, 20

034Motorsport
Air Filter, 034, 5.0" Inlet

Mahle
Mahle Engine Piston 033 21 01

Mahle
Mahle Engine Piston 033 04 00
034Motorsport
D+TUNE, 2.0T Simos 18.4, Stg2
034Motorsport
D+TUNE, 2.0T Simos 18.4, Stg1

034Motorsport
D+TUNE, 2.0 TFSI B8 ST1
034Motorsport
D+TUNE, EA113HO 20T FSI LO420
Mahle
Mahle Engine Piston 033 98 01

Mahle
Mahle Engine Piston 030 65 02
Industrial Injection
Industrial Injection BorgWarner Audi/VW 2.0 TFSI 03 Turbo - BW-53039880105

Industrial Injection
Inustrial Injection GT1749V Turbocharger Serv VW AUDI - 717858-5010S

Sun Coast Converters
SUNCOAST D Clutch Hub 35570-70K
Industrial Injection
Industrial Injection K04 Core Assembly - BW-53047100511

Industrial Injection
Industrial Injection K04 VW/ Audi Upgrade turbo - BW-53049887500

Eibach
Eibach Set of 4 Springs - 15107.140
Mahle
Mahle Radiator 70822637NA

NGK
NGK VWC029 WIRE SET CL5 Ignition Wire Set VWC029
PowerStop
Power Stop SEMI-COATED ROTOR KIT Audi A4 allroad 2020-25 Audi A4 Quattro 2020-25 Audi A5 Quattro 2020-24 Audi A5 Sportback 2020-25 SC8653
034Motorsport
D+TUNE, B9 A4/A5 DL382 Stage 1
034Motorsport
D+TUNE, 29TFSI B9 RS MG1 ST1+>

Industrial Injection
Industrial Injection K03-119 Turbocharger AUDI - BW-53039880106

Mahle
Mahle Engine Cooling Fan 70819945NA

Mahle
Mahle HVAC Blower Motor AB114000S

WeatherTech
WeatherTech 09-11 Audi A4/S4/RS4 Front and Rear Rubber Mats - Black
Centerforce
Centerforce Dual Friction Clutch Pressure Plate and Disc Set - DF205189

NGK
NGK U2010 CL11 Ignition Coil U2010

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

Mahle
Mahle A/C Evaporator Core AE205000P
PowerStop
Power Stop AUTOSPECIALTY BRAKE KIT Audi A4 allroad 2020-25 Audi A4 Quattro 2020-25 Audi A5 Quattro 2020-24 Audi A5 Sportback 2020-25 KOE8653

PowerStop
Power Stop AUTOSPECIALTY BRAKE KIT Audi A4 2020 Audi A4 Quattro 2021-25 KOE8654

PowerStop
Power Stop AUTOSPECIALTY BRAKE KIT Audi A4 allroad 2020-25 Audi A4 Quattro 2020-25 Audi A5 Quattro 2020-24 Audi A5 Sportback 2020-25 KOE8652
Mahle
Mahle Engine Piston Ring Set 42224CP.020
034Motorsport
D+TUNE, B7 A4 2.0T FSI, K04
034Motorsport
D+TUNE, EA113 LONG 20T FSI ST1

Rotiform
Wheel Pros Rotiform 18X9 WGR-M 5X112 35 57.1 R768189045 3525

Wheel Pros, LLC
AKLIMATE 235/40R19 96V XL 26.7
034Motorsport
D+TUNE, 2.0T B9 Q5, Stg2

Magnaflow
MagnaFlow USE 106-0744106-0320

Putco
Putco Plug and Play Load Resistor System - Fits 3157

WeatherTech
WeatherTech Grey Front Rear FloorLiner HP Fits -21-25 Audi 469371-469072IM

Mahle
Mahle Engine Crankshaft Main Bearing Set MS-2279H

WeatherTech
WeatherTech Tan Front Rear FloorLiner HP Fits -21-25 Audi 459371-459072IM

Mahle
Mahle Engine Piston 034 94 02

Putco
Putco Nitro-Lux - H11 / H9 / H8 - (Pair)
Mahle
Mahle A/C Compressor 72440492NA

WeatherTech
WeatherTech Cocoa Front Rear FloorLiner HP Fits -21-25 Audi 479371-479072IM

Magnaflow
MagnaFlow Exhaust Kit - 97-01 Audi A4 Quattro 1.8L106-0388

WeatherTech
WeatherTech 95-11 Audi A6/S6 Front and Rear Rubber Mats - Black

WeatherTech
WeatherTech 64-79 Volkswagen Bug Front and Rear Rubber Mats - Black
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