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.

Fel-Pro
Fel-Pro Audi A6 Quattro MS 97276 Exhaust Manifold Gasket Set
Stoptech
Centric 17-21 Audi A4 Front Right Brake Hose

Fel-Pro
Fel-Pro Audi A4 Quattro Engine Valve Cover Gasket Set

Covercraft
UVS100 Premier Series Custom Sunscreen

Covercraft
Covercraft UVS100 Custom Sunscreen - Blue

Fel-Pro
Fel-Pro Volkswagen Passat VS 50531 R Engine Valve Cover Gasket Set

Covercraft
UVS100 Premier Series Custom Sunscreen

Covercraft
Covercraft UVS100 Custom Sunscreen - Silver

Covercraft
UVS100 Premier Series Custom Sunscreen

Covercraft
UVS100 Premier Series Custom Sunscreen

Covercraft
Covercraft UVS100 Custom Sunscreen - Blue

Brembo
Brembo 1999 Audi A4 Quattro/00-02 S4/02-03 S6 Front Premium NAO Ceramic OE Equivalent Pad

Moog
MOOG 07-08 Audi RS4 Rear Left Upper Control Arm

Covercraft
Covercraft Custom Fit Car Covers - 3-Layer Moderate Climate Gray

Moog
MOOG 13-15 Audi RS5 Front Inner / Inner Tie Rod

Moog
MOOG 00-02 Audi S4 Front Right Upper Rearward Control Arm

Covercraft
Covercraft Custom Fit Car Covers - Sunbrella Gray

Fel-Pro
Fel-Pro Volkswagen Passat BS 40724 Engine Crankshaft Seal Kit

Fel-Pro
Fel-Pro Volkswagen Passat 26328 PT PermaTorque Engine Cylinder Head Gasket

Fel-Pro
Fel-Pro Audi A4 Quattro 26318 PT PermaTorque Engine Cylinder Head Gasket

Brembo
Brembo 10-13 Audi A3 Premium Low-Met OE Equivalent Pad - Rear

Covercraft
Covercraft Custom Fit Car Covers - Polycotton Gray

Moog
MOOG 07-08 Audi RS4 Rear Lower Rearward Control Arm

Fel-Pro
Fel-Pro Volkswagen Passat 26182 PT PermaTorque Engine Cylinder Head Gasket

Fel-Pro
Fel-Pro Volkswagen Jetta BS 40187 Engine Crankshaft Seal Kit

Fel-Pro
Fel-Pro Audi A4 Quattro TCS 46184 Engine Camshaft Seal

Brembo
Brembo 00-02 Audi S4/01-03 S8/00-06 TT Premium NAO Ceramic OE Equivalent Pad - Rear

Brembo
Brembo 13-17 Audi Q5/10-16 S4/2008 S5/10-17 S5/14-17 SQ5 Rear Premium NAO Ceramic OE Equivalent Pad

Brembo
Brembo 09-16 Audi A4/A4 Quattro/10-14 A5/2009 S5 Rear Premium NAO Ceramic OE Equivalent Pad

Covercraft
UVS100 Premier Series Custom Sunscreen

Covercraft
Covercraft UVS100 Custom Sunscreen - Silver

Covercraft
UVS100 Premier Series Custom Sunscreen

Brembo
Brembo 00-06 Audi A4/99-00 A8 Quattro/99-05 VW Passat Front Premium NAO Ceramic OE Equivalent Pad

Covercraft
UVS100 Premier Series Custom Sunscreen

Covercraft
Covercraft UVS100 Custom Sunscreen - Blue

Moog
MOOG 00-02 Audi S4 Front Left Upper Rearward Control Arm

Moog
MOOG 13-15 Audi RS5 Front Left Upper Forward Control Arm

Moog
MOOG 98-04 Audi A6 Front Left Upper Forward Control Arm

Fel-Pro
Fel-Pro Volkswagen Passat TCS 45038-1 Engine Crankshaft Seal Kit
Moog
MOOG 13-15 Audi RS5 Front Right Upper Rearward Control Arm

Moog
MOOG 00-02 Audi S4 Front Lower Forward Control Arm

Covercraft
Covercraft Custom Fit Car Covers - Ultratect Gray

Covercraft
Covercraft Custom Fit Car Covers - Reflectect Silver

Covercraft
Covercraft Custom Fit Car Covers - Polycotton Gray

Covercraft
Covercraft Custom Fit Car Covers - 3-Layer Moderate Climate Gray

Covercraft
Covercraft Custom Fit Car Covers - 5-Layer Indoor Gray

Covercraft
Covercraft Custom Fit Car Covers - Sunbrella Pacific Blue

Covercraft
Covercraft Custom Fit Car Covers - 5-Layer All Climate Gray

Fel-Pro
Fel-Pro BMW 325i SS 72682 Engine Valve Stem Oil Seal Set

Fel-Pro
Fel-Pro Volkswagen Passat SS 71074-2 Engine Valve Stem Oil Seal Set

Moog
MOOG 11-13 BMW 335is Left R and P Bellow Kit

Covercraft
Covercraft Custom Fit Car Covers - Ultratect Blue

Covercraft
Covercraft Custom Fit Car Covers - Ultratect Gray

Covercraft
Covercraft Custom Fit Car Covers - Ultratect Black

Covercraft
Covercraft Custom Fit Car Covers - Tan Flannel Tan

Covercraft
Covercraft Custom Fit Car Covers - Reflectect Silver

Covercraft
Covercraft Custom Fit Car Covers - WeatherShield HP Taupe

Covercraft
Covercraft Custom Fit Car Covers - WeatherShield HP Red

Covercraft
Covercraft Custom Fit Car Covers - WeatherShield HP Gray

Covercraft
Covercraft Custom Fit Car Covers - Polycotton Gray
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