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 exterior components Parts
2182 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

Diode Dynamics
Diode Dynamics LED Board SMD12 - Red (Single)

Diode Dynamics
Diode Dynamics - HID Bulb D2S 4300K (pair)

Diode Dynamics
Diode Dynamics 1156 LED Bulb HP11 LED - Cool - White (Pair)

Diode Dynamics
Diode Dynamics 36mm SMF2 LED Bulb - Red (Pair)

Diode Dynamics
Diode Dynamics 36mm SMF2 LED Bulb Warm - White (Single)

Diode Dynamics
Diode Dynamics 36mm SMF2 LED Bulb - Blue (Pair)

King Engine Bearings
King Engine Bearings Audi/VW Adz/Awt/Apk/Bhp/Bpy/Aks (Size +0.75mm) Main Bearing Set

Diode Dynamics
Diode Dynamics 1156 XP80 LED Bulb - Red (Pair)

Diode Dynamics
Diode Dynamics LED Board SMD12 - Blue (Single)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP5 LED Warm - White (Single)

Diode Dynamics
Diode Dynamics 1156 LED Bulb HP48 LED - Red (Pair)

Diode Dynamics
Diode Dynamics 1156 LED Bulb HP11 LED - Red (Pair)

Diode Dynamics
Diode Dynamics 921 XPR LED Bulb - Red (Pair)

Diode Dynamics
Diode Dynamics 36mm HP6 LED Bulb LED - Cool - White (Single)

Diode Dynamics
Diode Dynamics H8 XP80 LED - Cool - White (Pair)

Diode Dynamics
Diode Dynamics - HID Bulb D1S 5000K (pair)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP3 LED Warm - White (Single)

Diode Dynamics
Diode Dynamics 1156 LED Bulb HP11 LED - Amber (Pair)

Diode Dynamics
Diode Dynamics H8 Multicolor Fog/DRL LED Bulb Kit

Diode Dynamics
Diode Dynamics LED Board SMD12 Warm - White (Single)

Diode Dynamics
Diode Dynamics 36mm SMF2 LED Bulb - Cool - White (Pair)

Diode Dynamics
Diode Dynamics 194 LED Bulb SMD2 LED - Amber (Pair)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP3 LED - Cool - White (Single)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP3 LED - Blue (Single)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP3 LED - Amber (Single)

PowerStop
Power Stop 13-16 Audi allroad Euro-Stop ECE-R90 Rear Brake Pads

Diode Dynamics
Diode Dynamics 1156 XPR LED Bulb - Cool - White (Pair)

Diode Dynamics
Diode Dynamics 194 LED Bulb SMD2 LED - Red (Pair)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP5 LED - Cool - White (Single)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP5 LED - Red (Pair)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP5 LED Natural - White (Single)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP3 LED - Red (Pair)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP3 LED Pure - White (Single)

Diode Dynamics
Diode Dynamics 194 LED Bulb HP3 LED Natural - White (Single)

WeatherTech
WeatherTech 02-08 Audi A4/S4/RS4 SunShade

WeatherTech
WeatherTech 2020+ Audi A4 Scratch Protection - Transparent

WeatherTech
WeatherTech 17-21 Audi A4 Scratch Protection - Transparent

WeatherTech
WeatherTech 17-19 Audi A4 Scratch Protection - Transparent

WeatherTech
WeatherTech 2020+ Audi A4 Allroad Scratch Protection - Transparent

WeatherTech
WeatherTech 17-19 Audi A4 Scratch Protection - Transparent

WeatherTech
WeatherTech 13-16 Audi A4 Lampgard

WeatherTech
WeatherTech 2020+ Audi A4 Lampgard

WeatherTech
WeatherTech 1999+ Audi A4 Lampgard

WeatherTech
WeatherTech 06-08 Audi A4 Lampgard

WeatherTech
WeatherTech 2006+ Audi A4 Lampgard

WeatherTech
WeatherTech 1999+ Audi A4 Lampgard

WeatherTech
WeatherTech 2015+ Audi A4 Cargo Liners - Tan

WeatherTech
WeatherTech 2017+ Audi A4/S4/RS4 Cargo Liners - Black

PowerStop
Power Stop 02-04 Audi A6 Quattro Front Z23 Evolution Sport Brake Pads w/Hardware

Putco
Putco Mini-Halogens - 1157 - Night White

Putco
Putco 1156 - Red Metal 360 LED

Putco
Putco Mini-Halogens - 1157 Jet Yellow

Putco
Putco 921 - Amber Metal 360 LED

PowerStop
Power Stop 17-19 Audi A4 Front Evolution High Carbon Geomet Coated Rotor

PowerStop
Power Stop 96-99 Audi A4 Front Z16 Evolution Ceramic Brake Pads

Putco
Putco Mini-Halogens - 1157 - Nitro White

PowerStop
Power Stop 03-04 Audi A4 Rear Z17 Evolution Ceramic Brake Pads w/Hardware

Gates
Gates 03-10 Honda Accord EX / 04-12 Acura TL Base DriveAlign Idler Pulley

PowerStop
Power Stop 06-09 Audi A4 Front Autospecialty Brake Rotor

PowerStop
Power Stop 96-04 Audi A4 Front Evolution High Carbon Geomet Coated Rotor
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