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 gaskets and seals Parts
287 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

Victor Reinz
MAHLE Original Audi 90 95-93 Head Set

Victor Reinz
MAHLE Original Audi A3 08-06 Cylinder Head Gasket

Victor Reinz
MAHLE Original Audi A4 08-06 Spark Plug Tube Seal

Victor Reinz
MAHLE Original Audi A4 08-06 Rear Main Seal

Victor Reinz
MAHLE Original 32 X 3 Mm Metric O Ring O-Ring

Victor Reinz
MAHLE Original Audi A4 05-02 Cylinder Head Gasket

Victor Reinz
MAHLE Original Audi A4 08-06 Cylinder Head Gasket (Left)

Victor Reinz
MAHLE Original Audi A3 Quattro 09-06 Fuel Injection O-Ring

Victor Reinz
MAHLE Original Audi A3 13-08 Rear Main Seal

Victor Reinz
MAHLE Original Audi A4 Quattro 09 Valve Cover Set

Victor Reinz
MAHLE Original Audi A4 97-96 Head Set

Victor Reinz
MAHLE Original Audi A4 Quattro 10-09 Intake Manifold Set

Victor Reinz
MAHLE Original Audi A4 05-00 Exhaust Manifold Set

Victor Reinz
MAHLE Original Audi A3 13-08 Camshaft Sensor O-Ring

Cometic Gasket
Cometic 2.0L 16V TSI/TFSI Volkswagen EA888 .051in MLS 84mm Bore Head Gasket

Cometic Gasket
Cometic 04+ VW Golf GTI / 05+ Jetta/Passat TFSI / 05+ Audi A3/A4/A6 /06+ TT 16v 2.0L 83.5mm .051 inc

Cometic Gasket
Cometic 98-06 VW/Audi 18.L Turbo 82mm .120 inch MLS Head Gasket

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L 20V 82mm .056in MLS Head Gasket

Cometic Gasket
Cometic 08-11 VW/Audi 2.0L 84mm Bore .030 Thickness MLS Head Gasket

Cometic Gasket
Cometic Volkswagen 1.8/2.0L 16v TFSi EA888 83mm Bore .060in MLS Cylinder Head Gasket w/ Valvelift

Cometic Gasket
Cometic 98-06 VW/Audi 18.L Turbo 82mm .140 inch MLS Head Gasket

Cometic Gasket
Cometic 2005+ Audi/VW 2.0L 16V BWA/BPY 83.5mm Bore .036in MLS Head Gasket

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L 20V 82mm .066in MLS Head Gasket

Cometic Gasket
Cometic Volkswagen 2.0L 16V TFSI EA113 83.5mm Bore .075in MLS Head Gasket

Cometic Gasket
Cometic VW/Audi 1.8L 20V Turbo EA827 85mm .036 inch MLS Head Gasket

Cometic Gasket
Cometic 97-06 VW/Audi 1.8L Turbo 85mm .040 inch MLS Head Gasket

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L Turbo 82mm .027in MLS Head Gasket

Cometic Gasket
Cometic VW/Audi 05+ BWA/BPY 2.0L 16V 83.5mm .050 inch MLS Head Gasket

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L 20V 82mm .075in MLS Head Gasket

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L Turbo 82mm .044in MLS Head Gasket

Cometic Gasket
Cometic VW Golf/GTI/Jetta/Passat Audi A3/A4/A6/TT 2.0L 16V 83.5mm .086in MLS Head Gasket

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L Turbo 85mm .051 inch MLS Head Gasket

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L Turbo 82mm .071in MLS Head Gasket

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L Turbo 82mm .040in MLS Head Gasket

Cometic Gasket
Cometic 2012+ VW/Audi 2.0L 84mm .040 inch MLS Head Gasket

Cometic Gasket
Cometic 2012+ VW/Audi 2.0L 83mm .040 inch MLS Head Gasket

Cometic Gasket
Cometic Volkswagen 1.8/2.0L 16v TFSI EA888 83mm Bore .075i MLS Cylinder Head Gasket w/ Valvelift

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L 20V 82mm .080in MLS Head Gasket

Cometic Gasket
Cometic Volkswagen 2.0L 16v TFSI 83.5mm .120 inch MLS Head Gasket

Cometic Gasket
Cometic Volkswagen 2.0L 16v TFSI 83.5mm Bore .140in MLS Head Gasket

Cometic Gasket
Cometic 08-11 VW/Audi 2.0L 84mm Bore .040 Thickness MLS Head Gasket

Cometic Gasket
Cometic VW/Audi 05+ BWA/BPY 2.0L 16V 83.5mm .040 inch MLS Head Gasket

Cometic Gasket
Cometic Volkswagen 2.0L 16V TFSI EA113 83.5mm Bore .080in MLS Head Gasket

Cometic Gasket
Cometic Volkswagen 1.8/2.0L 16V TFSI EA888 83mm Bore .070in MLS Head Gasket

Cometic Gasket
Cometic 08-11 Audi/VW 2.0L 82.5mm Bore .040in MLS Head Gasket

Cometic Gasket
Cometic Volkswagen 1.8L 20V Turbo EA827 82mm .036 inch MLS Head Gasket

Cometic Gasket
Cometic 05-14 VW/Audi 2.0L .030in MLS Exhaust Gasket
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