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.

CP Pistons
CP Piston & Ring Set for Audi/VW 2.0L TFSI - Bore (83.5mm) - Size (+1mm) - CR (9.5) - SIngle

JE Pistons
Volkswagen 2.0L Turbo, 83.00 Bore, Dish, Set of 4

JE Pistons
Volkswagen 2.0L Turbo, 82.50 Bore, Dish, Set of 4

Cometic Gasket
Cometic VW Golf/GTI/Jetta/Passat Audi A3/A4/A6/TT 2.0L 16V 5 Layer 83.5mm .065 inch MLS Head Gasket

Wiseco
Wiseco VW/Audi Turbo Conversion 20V Cyl Head 81.5mm Bore 8.5 CR Pistons (Inc Rings)

JE Pistons
JE Pistons VW 1.8T 20V KIT 81.0 Set of 4 Pistons

JE Pistons
JE Pistons VW 1.8L 20V 9.25 KIT Set of 4 Pistons

JE Pistons
JE Pistons VW 2.0T TSI (23mm Pin) 83mm Bore 9.6:1 CR Piston (Set of 4)

JE Pistons
JE Pistons VW 1.8T 20V KIT 83.0 Set of 4 Pistons

JE Pistons
Volkswagen 2.0L Turbo, 83.50 Bore, Dish, Set of 4

JE Pistons
JE Pistons VW 2.0T TSI Ultra Series 21mm PIN - Set of 4 Pistons

King Engine Bearings
King Engine Bearings Audi A4 1.8L AEB (Size STD) Main Bearing Set

Bilstein
Bilstein B6 (DampTronic) 17-21 Audi A4 Allroad Rear Monotube Shock Absorber

JE Pistons
JE Pistons VW 1.8T 20V KIT 83.0 Set of 4 Pistons

JE Pistons
Volkswagen 2.0L Turbo, 82.50 Bore, Dish, Set of 4

JE Pistons
Volkswagen 2.0L Turbo, 83.50 Bore, Dish, Set of 4

King Engine Bearings
King Engine Bearings Audi BYT/CDNC/CCZD/CPSA Connecting Rod Bearing Set

King Engine Bearings
King Engine Bearings Volkswagen 1781cc Turbo/1984cc (Size .026) Connecting Rod Bearings (Set of 4)

Eagle
Eagle Audi 1.8L Connecting Rods (Set of 4)
JE Pistons
JE Pistons VW 1.8L 20V 9.25 KIT Set of 4 Pistons

Wiseco
Wiseco VW/Audi Turbo Conversion 20V Cyl Head 82.0mm Bore 8.5 CR Pistons (Inc Rings)

Wiseco
Wiseco VW/Audi Turbo Conversion 20V Cyl Head 82.5mm Bore 8.5 CR Pistons (Inc Rings)

JE Pistons
Volkswagen 2.0L Turbo, 83.50 Bore, Dish, Set of 4

JE Pistons
JE Pistons VW 1.8L 20V 9.25 KIT Set of 4 Pistons

ARP
ARP VW 1.8L Turbo 20V M11 (without tool) (early AEB) Head Stud Kit

JE Pistons
JE Pistons VW TSI 2.0L TUrbo 82.5mm Bore -7.1cc w/23mm Pin Dish Piston (Set of 4)

King Engine Bearings
King Engine Bearings Audi / VW ADZ/AWT/APK (Size +0.25mm) Main Bearing Set

CP Pistons
CP Piston & Ring Set for Audi / VW 2.0L TFSI - Bore (83.0mm) - Compression Ratio (9.5)

JE Pistons
JE Pistons VW 2.0T TSI 9.5:1 ASYM KIT Set of 4 Pistons

King Engine Bearings
King Engine Bearings Audi/VW 1.8/2.0 TSI/TFSI (Size 0.75 Oversized) Main Bearing Set

JE Pistons
JE Pistons AUDI 1.8T 9.25:1 KIT Set of 4 Pistons

King Engine Bearings
King Engine Bearings Audi CDAA/CDHA/CDHB/CDAB Main Bearing Set (Set of 5) - Size STD

JE Pistons
JE Pistons VW 1.8L Ultra Series KIT Set of 4 Pistons

ARP
ARP 95-01 Audi 2.8L Non Turbo / 00-05 Audi 2.7L Rod Bolt Kit

King Engine Bearings
King Engine Bearings Volkswagen VR6 2.8L Performance Main Bearing Set .25 Oversize - 7 Pairs

King Engine Bearings
King Engine Bearings Volkswagen JR 1.6L (td) Thrust Washer Set

King Engine Bearings
King Engine Bearings Volkswagen VR6 2.8L (STDX Size) Main Bearing Set

JE Pistons
JE Pistons VW 2.0T TS1 (21mm Pin) 82.5mm Bore 9.6:1 CR -7.1 Dome FSR Piston Kit (Set of 4)

Wiseco
Wiseco Volkswagen 1.8T 8V Dished -7cc 81MM Piston Shelf Stock Kit

Mahle
Mahle MS Piston Set VW TFSi 2.0L 82.5mm Bore 92.8mm Stroke 144mm Rod 20mm Pin -10cc 9.3 CR Set of 4

King Engine Bearings
King Audi/Volkswagen ADZ/AWT/APK/BHP/BPY/AKS 1.6/1.8/2.0L Crankshaft Main Bearing Set

Wiseco
Wiseco Volkswagen ABF 2.0L 16V 83.5mm Bore 11.8:1 CR 8cc Dome Pistons - Set of 4

Go Fast Bits
GFB 94-98 Subaru WRX Light-Weight Engine Pulley (Crank/Alternator/Power Steering Pulleys/Belts inc)

Mahle
Mahle MS Piston Set VW 1.8T 81.50mm Bore 86.4mm Stroke 144mm Rod 20mm Pin -12cc 8.5 CR Set of 4

JE Pistons
JE Pistons VW 2.0T FSI Ultra Series 20mm PIN - Set of 4 Pistons

King Engine Bearings
King Engine Bearings Audi/VW 1.8/2.0 TSI/TFSI (Size 0.25 Oversized) Main Bearing Set

JE Pistons
JE Pistons VW 2.0T TSI 9.5:1 ASYM KIT Set of 4 Pistons

K&N Engineering
K&N Oil Filter OIL FILTER AUTOMOTIVE

JE Pistons
JE Pistons VW 1.8T 20V KIT 82.5 Set of 4 Pistons

ARP
ARP VW 1.8L Turbo 20V M10 (with tool) Head Stud Kit

JE Pistons
JE Pistons VW 1.8T 20V 8.5 KIT Set of 4 Pistons

Clevite
Clevite Audi/VW 1781CC / 1984CC Main Bearing Set

JE Pistons
JE Pistons VW 2.0T TSI 8.5:1 KIT Set of 4 Pistons

JE Pistons
JE Pistons VW 2.0T TSI 9.1:1 KIT Set of 4 Pistons

King Engine Bearings
King Engine Bearings Audi/VW 1.8/2.0 TSI/TFSI Main Bearing Set - Size STD

JE Pistons
Volkswagen 2.0L Turbo, 82.50 Bore, Dish, Set of 4

Wiseco
Wiseco Volkswagen ABF 2.0L 16V Golf/Ibiza/A4/Octavia 10.5:1 CR 83.5mm Bore +1 Oversize Piston Set

Fluidampr
Fluidampr Audi 2.7L Twin Turbo/2.8L and 3.0L V6 Internally Balanced Damper

King Engine Bearings
King Engine Bearings Audi A4 1.8L AEB (Size +.25 Oversized) Main Bearing Set

CP Pistons
CP Piston & Ring Set for Audi/VW 1.8L 20V - Bore (83mm) - Compression Ratio (9.5:1) - Single
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