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.

R1 Concepts
R1 Concepts Brake Rotor- Blank with Optimum Oe Pads Hdw Fits Audi A4
R1 Concepts
R1 Concepts Brake Rotor- Slotted - Silver Fits Audi A4
R1 Concepts
R1 Concepts Brake Rotors - Carbon Coated w/ Euro Ceramic Pads Hdw

R1 Concepts
R1 Concepts Brake Rotor- Carbon Coated Fits Audi A4

R1 Concepts
R1 Concepts Brake Rotor- Carbon Coated Fits Audi S6

R1 Concepts
R1 Concepts Brake Rotors - Carbon Coated w/ Euro Ceramic Pads Hdw

R1 Concepts
R1 Concepts Brake Rotors - Carbon Coated w/ Euro Ceramic Pads Hdw Fits Audi A4

R1 Concepts
R1 Concepts Disc Brake Kit
R1 Concepts
R1 Concepts Brake Rotor- Carbon D/S Fits Audi S4
R1 Concepts
R1 Concepts Disc Brake Kit Fits Audi Allroad

R1 Concepts
R1 Concepts Brake Rotor- Carbon Coated Fits Audi A6

R1 Concepts
R1 Concepts Brake Rotor- Slotted - Silver Fits Audi A6

STANDARD IGN
INTERMOTOR SWITCH - HEADL
R1 Concepts
R1 08-25 Audi A4 Front Drilled & Slotted Silver Brake Rotor Set
R1 Concepts
R1 Concepts Brake Rotor- Slotted - Silver Fits Audi A4
R1 Concepts
R1 Concepts Brake Rotor- Carbon Coated with Ceramic Pads Hdw Fits Audi A4
STANDARD IGN
ELECTRONIC TB

R1 Concepts
R1 Concepts Brake Rotor- Carbon Coated with Ceramic Pads Hdw

R1 Concepts
R1 09-25 Audi A4 Left Drilled & Slotted Black Brake Rotor

R1 Concepts
R1 08-17 Audi A4 Rear Drilled & Slotted Silver Brake Rotor Set w/Ceramic Pads and Hardware

R1 Concepts
R1 17-19 Audi A4 Quattro Front Right Drilled & Slotted Silver Brake Rotor

R1 Concepts
R1 11-17 Audi A5 Front Right Drilled & Slotted Silver Brake Rotor

STANDARD IGN
INTERMOTOR FUEL INJECTION

STANDARD IGN
INTERMOTOR SENSOR - PRESS

R1 Concepts
R1 00-09 Audi A4 (USA/Canada) Rear Right Drilled & Slotted Silver Brake Rotor

R1 Concepts
R1 98-09 Audi A4 (USA/Canada) Front Right Drilled & Slotted Silver Brake Rotor
R1 Concepts
R1 Concepts Brake Rotor- Blank Fits Audi A4
R1 Concepts
R1 Concepts Brake Rotor- Slotted - Black

R1 Concepts
R1 Concepts Brake Rotor- Slotted - Black Fits Audi 200

R1 Concepts
R1 96-05 Audi A4 Quattro Rear Left Drilled & Slotted Geoperformance Rotor

R1 Concepts
R1 17-19 Audi A4 Quattro Front Left Geoperformance Rotor
R1 Concepts
R1 Concepts Brake Rotor- Slotted - Silver Fits Audi A4

R1 Concepts
R1 E- Line Series Brake Rotor - D/S - Black w/ Ceramic Pads Hdw Fits Audi A4
R1 Concepts
R1 Concepts Disc Brake Kit Fits Audi A4

R1 Concepts
R1 08-25 Audi A5 Front Left Drilled & Slotted Geoperformance Rotor
R1 Concepts
R1 Concepts E- Line Series Brake Rotor with Ceramic Brake Pads Hdw Fits Audi A4
R1 Concepts
R1 Concepts Brake Rotors - Carbon Coated w/ Optimum Oe Pads Hdw Fits Audi A4

R1 Concepts
R1 08-25 Audi A4 (USA/Canada) Rear Right Drilled & Slotted Geoperformance Rotor

R1 Concepts
R1 08-12 Audi Q5 (USA/Canada) Front Right Drilled & Slotted Geoperformance Rotor

R1 Concepts
R1 Concepts Brake Rotors - Carbon Coated w/ Optimum Oe Pads Hdw Fits Audi A6

R1 Concepts
R1 97-06 Audi A4 (USA/Canada) Front Left Drilled & Slotted Geoperformance Rotor
R1 Concepts
R1 96-08 Audi A4 (USA/Canada) Rear Left Drilled & Slotted Geo-Carbon Rotor

Specialty Products Inc.
B6 AUDI & VW RACING ARM KIT
R1 Concepts
R1 E- Line Series Brake Rotor - D/S - Black w/ Ceramic Pads Hdw Fits Audi A4

STANDARD IGN
MODULE

R1 Concepts
R1 00-09 Audi A4 Quattro Rear Drilled & Slotted Silver Brake Rotor Set w/Ceramic Pads and Hardware

R1 Concepts
R1 08-12 Audi A5 Front Left Drilled & Slotted Geoperformance Rotor

R1 Concepts
R1 Concepts Brake Rotor Drilled and Slotted Silver Fits Genesis G80

R1 Concepts
R1 96-05 Audi A4 Quattro Rear Right Drilled & Slotted Geoperformance Rotor

R1 Concepts
R1 11-17 Audi Q5 (Mexico) Front Right Drilled & Slotted Geo-Carbon Rotor
R1 Concepts
R1 00-09 Audi A4 (Mexico) Rear Left Drilled & Slotted Geo-Carbon Rotor
Specialty Products Inc.
AUDI A4 RACING CONTROL ARMS

Specialty Products Inc.
AUDI ADJUSTABLE UCA - RIGHT

Specialty Products Inc.
AUDI ADJUSTABLE UCA - LEFT
R1 Concepts
R1 17-19 Audi A4 Quattro Front Right Geoperformance Rotor

R1 Concepts
R1 00-08 Audi A4 Quattro Rear Left Drilled & Slotted Geoperformance Rotor

R1 Concepts
R1 97-06 Audi A6 (USA/Canada) Front Right Drilled & Slotted Geoperformance Rotor

R1 Concepts
R1 Concepts Brake Rotor- Blank Fits Audi TTS
Specialty Products Inc.
AUDI A4 CONTROL ARMS RIGHT

Specialty Products Inc.
AUDI A4 CONTROL ARMS LEFT
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