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:engines and components Parts
763 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

K&N Engineering
K&N 97-06 Audi A4 1.8L L4 Spin On Oil Filter

Boostline
Volkswagen, 1.8T 20V 20mm Pin, 144.00 mm Length, Connecting Rod

Boostline
Volkswagen, 1.8T 20V 20mm Pin, 144.00 mm Length, Connecting Rod Set

Cometic Gasket
Cometic Volkswagen 2.0L 16v TFSI EA888 .066in MLS Cylinder Head Gasket - 84mm Bore

Cometic Gasket
Cometic Volkswagen 2.0L 16v TFSI EA888 .056in MLS Cylinder Head Gasket - 82.5mm Bore

Cometic Gasket
Cometic Volkswagen 2.0L 16V TFSI EA888 84mm Bore .080in MLS Cylinder Head Gasket w/o Valvelift

Cometic Gasket
Cometic 08-11 VW/Audi 2.0L 84mm Bore .056 Thickness MLS Head Gasket

Wiseco
Wiseco Audi/VW 2.0L 83.00mm Bore 92.8mm Stroke -7.1cc EA888 Piston Kit - 4 Cyl

Wiseco
Wiseco Audi/VW 2.0L 83.00mm Bore 92.8mm Stroke -8.00cc EA113 Piston Kit - 4 Cyl

Wiseco
Wiseco Audi/VW 2.0L 83.00mm Bore 92.8mm Stroke -7.1cc EA888 Piston Kit - 4 Cyl

Wiseco
Wiseco Audi/VW 2.0L 83.50mm Bore 92.8mm Stroke -8.4cc EA888 Piston Kit - 4 Cyl

Wiseco
Wiseco Audi/VW 2.0L 83.00mm Bore 92.8mm Stroke -7.8cc EA888 Piston Kit - 4 Cyl

Wiseco
Wiseco Audi/VW 2.0L 82.50mm Bore 92.8mm Stroke -7.1cc EA888 Piston Kit - 4 Cyl

Wiseco
Wiseco Audi/VW 2.0L 85.50mm Bore 92.8mm Stroke -4.5cc EA888 Piston Kit - 4 Cyl

Wiseco
Wiseco Audi/VW 2.0L 82.50mm Bore 92.8mm Stroke -10.8cc EA888 Piston Kit - 4 Cyl

King Engine Bearings
King Engine Bearings Audi Abb/Abm/Adp/Pp/Rn (Size +1.0mm) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Audi ABB/ABM/ADP/PP/RN Connecting Rod Bearing Set

Wiseco
Wiseco VLKSWGN 1.8T 5v Dished -7cc 82MM Piston Shelf Stock Kit

Wiseco
Wiseco 4 Stroke Forged Series Piston Kit, 86.00 MM Bore, 13.5:1 CR

Wiseco
Wiseco VLKSWGN 1.8T 5v Dished -7cc 81MM Piston Shelf Stock Kit

Cometic Gasket
Cometic Volkswagen 2.0L 16V TFSI EA113 83.5mm Bore .070in MLS Head Gasket

Wiseco
Wiseco VLKSWGN 1.8T 5v Dished -7cc 81.5 Piston Shelf Stock Kit

King Engine Bearings
King Engine Bearings VW/Audi Aku/Aqm/Cr/Cy/Jk/Jr/Ky/Ra (Size +0.75mm) Main Bearing Set

King Engine Bearings
King Engine Bearings VW/Audi Aku/Aqm/Cr/Cy/Jk/Jr/Ky/Ra (Size +0.50mm) Main Bearing Set

King Engine Bearings
King Engine Bearings Audi Abb/Abm/Adp/Pp/Rn (Size +0.50mm) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Audi CDaa/CDha/CDhb/CDab (Size +0.25mm) Main Bearing Set

Cometic Gasket
Cometic Volkswagen 1.8L 20v T EA827 .045in MLS Cylinder Head Gasket - 85mm Bore

Cometic Gasket
Cometic Volkswagen 2.0L 16V TFSI EA113 83.5mm Bore .098in MLS Cylinder Head Gasket

Cometic Gasket
Cometic Volkswagen 1.8L 20v T EA827 .095in MLS Cylinder Head Gasket - 82mm Bore

King Engine Bearings
King Engine Bearings Audi Cepa/Cepb (Size +.026mm) Connecting Rod Bearing Set

Wiseco
Wiseco VW 1.8T 82.00 mm Bore 1.2655in CH -12.50 CC Piston Set

Wiseco
Wiseco Volkswagen 1.8T 5V Dished -7cc 81mm Piston Shelf Stock

King Engine Bearings
King Engine Bearings Audi BYT/CDNC/CCZD/CPSA (Size 0.50) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Audi Abb/Abm/Adp/Pp/Rn (Size +0.25mm) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Audi CDaa/CDha/CDhb/CDab (Size +0.50mm) Main Bearing Set

King Engine Bearings
King Engine Bearings Volkswagen 1781Cc Turbo & 1984Cc (Size +0.25mm) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Audi Abb/Abm/Adp/Pp/Rn (Size +0.75mm) Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Audi/VW Adz/Awt/Apk/Bhp/Bpy/Aks (Size +0.50mm) Main Bearing Set

King Engine Bearings
King Engine Bearings Audi CDaa/CDha/CDhb/CDab (Size +0.75mm) Main Bearing Set

Wiseco
Wiseco VLKSWGN 1.8T 5v Dished -7cc 82MM Piston Shelf Stock

Brian Crower
Brian Crower Connecting Rods - Volkswagen/Audi 1.8T - 5.670iin - ProH w/ARP625+ Fasteners
Gates
Gates 99-06 Audi A4/TT / 99-06 VW Jetta 1.8L Racing Performance Timing Belt
Gates
Gates 01 Audi A4 / 00-06 VW Golf / 00-05 Jetta / 00-01 Passat Perf Racing Timing Belt w/Water Pump

Gates
Gates 12 Audi A6/13 A4/A5/Allroad / 09-12 BMW M3 / 88-91 Ford Tempo Micro-V Belt

Gates
Gates 98-07 Audi A4/A6/A8/Allroad Quattro/RS6/S4/S6/S8 Racing Performance Timing Belt

Gates
Gates 99-06 Audi A4/A4 Quattro Racing Performance Timing Belt Component Kits w/ Water Pump

Victor Reinz
MAHLE Original Audi A4 06-97 Engine Valve Stem Seal Set

Carrillo
Carrillo VW 1.8T 16V 2.0 16V (9a) Pro-H 3/8 CARR Bolt Connecting Rods (4 cyl)

Supertech
Supertech Audi/VW 1.8T 5V Inconel Exhaust Valve - Single (Drop Ship Only)

Carrillo
Carrillo VW 1.8T 16V/2.0L 16V (9a) 2.2L Pro-A 3/8 WMC Bolt Connecting Rods (Special Order No Cancel)

Victor Reinz
MAHLE Original Audi A4 08-06 Cylinder Head Bolts

Victor Reinz
MAHLE Original Audi 90 95-93 Cylinder Head Bolts

Victor Reinz
MAHLE Original Audi A4 06-02 Cylinder Head Bolts

Carrillo
Carrillo VW/Audi 2.8 VR6 w/ 82mm or Larger Bore Pro-H 3/8 WMC Bolt Connecting Rods

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

Victor Reinz
MAHLE Original Audi A4 01-97 Cylinder Head Bolts

Carrillo
Carrillo VW 2.8 VR6 w/ 82mm or Larger Bore Pro-H 8mm CARR Bolt Connecting Rods (Set of 6)

Supertech
Supertech VW 1.8T 83mm Bore -14.8cc Dish 9:1 CR Pistons - Set of 4 (Rated 700HP) (Excl Rings)

Victor Reinz
MAHLE Original Mercedes-Benz E300 99-95 Engine Valve Stem Seal Set

Carrillo
Carrillo VW 1.8T 16V 2.0 16V (9a) Pro-H 3/8 WMC Bolt Connecting Rods (4 cyl)
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