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.

DBA
DBA 17-20 Audi A4 Street Series Rear Brake Pads

Hella
Hella FF-Fog Light Audi A4 (8k2 B8) Right

Hella
Hella FF-Fog Light Audi A4 (8k2 B8) Left

Hella
Hella 2013-2016 Audi A4 A4 Quattro S4 Right Inner Tail Light

Hella
Hella 2015-2022 Audi A4 Right Inner Tail Light

Hella
Hella 2013-2016 Audi A4 A4 Quattro S4 Left Inner Tail Light

Hella
Hella 2017-2020 Audi A4 Left Tail Light

Hella
Hella 2013-2015 Audi S4 Right Outer Tail Light

Hella
Hella 2017-2017 Audi A4 Right Tail Light

Hella
Hella 2013-2015 Audi S4 Left Outer Tail Light

Hella
Hella 2017-2017 Audi A4 Left Tail Light

Hella
Hella 2013-2016 Audi S4 Right Outer Tail Light

Hella
Hella 2013-2016 Audi S4 Left Outer Tail Light

Hella
Hella 2007-2015 Audi A4 A4 Quattro Fog Light Right

Hella
Hella 2007-2015 Audi A4 A4 Quattro Fog Light Left

Hella
Hella 2005-2008 Audi A4 Right Tail Light

Hella
Hella 2005-2008 Audi A4 Left Tail Light

Hella
Hella 2009-2012 Audi A4 Right Inner Tail Light

Hella
Hella 2009-2012 Audi A4 Left Inner Tail Light

Hella
Hella Xenon Ballast System 12V 5DV

Hella
Hella 2009-2012 Audi A4 Right Outer Tail Light

Hella
Hella 2009-2012 Audi A4 Left Outer Tail Light

WeatherTech
WeatherTech 2023 Mercedes-Benz EQS SUV X296 5-Passenger Cargo Liner w/Bumper Protector - Grey

PowerStop
Power Stop 98-05 Volkswagen Passat Euro-Stop ECE-R90 Front Brake Pads

Covercraft
Covercraft UVS100 Custom Sunscreen - Silver

Covercraft
Covercraft 16-24 Audi A4/ 16-24 Custom 5-Layer Softback All Climate Car Cover - Gray

Covercraft
Covercraft 12 -20 Porsche 911 Custom 5-Layer Softback All Climate Car Cover - Gray

Covercraft
Covercraft 04-08 Audi S4 Sedan/02-08 Custom 5-Layer Softback All Climate Car Cover - Gray

King Engine Bearings
King Engine Bearings Audi Amb/Aum/Alt/Awa/Blr (Size +1.0mm) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Audi Acz/Aah/Ack. Aej/Asn (Size +0.50mm) Main Bearing Set

Diode Dynamics
Diode Dynamics 36mm HP6 LED Bulb LED - Blue (Single)

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

Diode Dynamics
Diode Dynamics - HID Bulb D1S 4300K (pair)

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

Diode Dynamics
Diode Dynamics 36mm HP6 LED - Red (Pair)

Diode Dynamics
Diode Dynamics - HID Bulb D2S 8000K (pair)

Diode Dynamics
Diode Dynamics - HID Bulb D3S 8000K (pair)

Diode Dynamics
Diode Dynamics 1156 LED Bulb HP48 LED - Cool - White (Pair)

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

King Engine Bearings
King Engine Bearings Audi Acz/Aah/Ack/Aej/Asn/Ltr (Size +0.75mm) Connecting Rod Bearing Set

Diode Dynamics
Diode Dynamics 194 LED Bulb HP5 LED - Blue (Single)

Diode Dynamics
Diode Dynamics - HID Bulb D1S 8000K (pair)

King Engine Bearings
King Engine Bearings Audi Acz/Aah/Ack. Aej/Asn (Size +0.25mm) Main Bearing Set

King Engine Bearings
King Engine Bearings Audi Amb/Aum/Alt/Awa/Blr (Size +0.75mm) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Volkswagen AMB/BYK/BBX (Size .5mm) Performance Rod Bearing Set

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

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

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

Diode Dynamics
Diode Dynamics 36mm HP6 LED - Blue (Pair)

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

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

Diode Dynamics
Diode Dynamics - HID Bulb D5A 5000K (pair)

PowerStop
Power Stop 99-06 Audi A4 Front Z16 Evo Ceramic Brake Pad

Diode Dynamics
Diode Dynamics 194 LED Bulb HP5 LED - Amber (Single)

Diode Dynamics
Diode Dynamics H7 HP48 LED - Cool - White (Pair)

Diode Dynamics
Diode Dynamics 1156 XP80 LED - Amber (Pair)

Diode Dynamics
Diode Dynamics 194 LED Bulb HPHP3 LED - Green (Single)

King Engine Bearings
King Engine Bearings Audi Acz/Aah/Ack/Aej/Asn/Ltr (Size +0.25mm) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Audi Acz/Aah/Ack/Aej/Asn/Ltr (Size +0.50mm) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Audi Amb/Aum/Alt/Awa/Blr (Size +0.25mm) Connecting Rod Bearing Set
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