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.
Brian Crower
Brian Crower Connecting Rods - Volkswagen/Audi 1.8T - 5.670in - Sportsman w/ARP 2000 Fasteners

Victor Reinz
MAHLE Original Audi A4 01-97 Camshaft Seal

Supertech
Supertech VW 1.8T 81.5mm Bore 32.7mm CH -4cc Dish 9.3:1 CR Pistons - Set of 4 (Rated 600HP/33PSI)

Carrillo
Carrillo VW/Audi 3.2VR w/ 84mm or Larger Bore Pro-H 3/8 WMC Bolt Connecting Rod (Single Rod)

Victor Reinz
MAHLE Original Audi A6 Quattro 11-05 Oil Pump Sealing Washer

Carrillo
Carrillo VW/Audi 3.2VR w/ 84mm or Larger Bore Pro-H 3/8 WMC Bolt Connecting Rods (Set of 6)

Carrillo
Carrillo Volkswagen FSI 2.0L (20mm Pin) 5.67in Pro-H 3/8 CARR Bolt Connecting Rods (Set of 4)

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

Victor Reinz
MAHLE Original Audi A3 13-06 Cylinder Head Bolts

King Engine Bearings
King Engine Bearings Audi/VW 1.8/2.0 TSI/TFSI (Size 0.50 Oversized) Main Bearing Set

JE Pistons
JE Pistons 2008+ VW TSI 2.0 Turbo Kit 82.5mm Bore Std Size -7.1 Dome R Skirt Piston Kit (Set of 4)

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

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

JE Pistons
JE Pistons 08-14 VW 2.0TSI (21mm Pin) 82.5mm Bore 10:1 CR -4.5cc Dome FSR Series Piston (Set of 4)

King Engine Bearings
King Engine Bearings Audi A4 1.8L AEB Performance Main Bearing Set - Size STD

JE Pistons
JE Pistons VW 1.8T 20V (20mm Pin) 81mm Bore FSR Piston Kit (Set of 4)

CP Pistons
CP Piston & Ring Set for Audi/VW 2.0L TFSI - Bore (82.5mm) - Size (STD) - CR (9.5) - Set of 4

ARP
ARP Golf/Jetta 1.8L Turbo 20 valve Head Stud Kit w/ Tool

K&N Engineering
K&N Performance Oil Filter for 2019 Audi A3 2.0L

Wiseco
Wiseco Volkswagen ABF 2.0L 16V Golf/Ibiza/A4/Octavia 10.5:1 CR 83mm Bore .020 Oversize Piston Set

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

CP Pistons
CP Piston & Ring Set for Audi/VW 2.0L TFSI - Bore (82.5mm) - Size (STD) - CR (9.5) - Set of 4

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

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

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

JE Pistons
JE Pistons VW 2.0T TSI (22mm Pin) 83mm Bore 9.6:1 CR -7.8cc Dish Asymmetric FSR Piston (Set of 4)

Wiseco
Wiseco Volkswagen ABA 2.0L 20V -19.4cc Dish 83.50mm Bore 8.0:1 CR Build on Demand

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

JE Pistons
JE Pistons VW 2.0T TSI (23mm Pin) 83.5mm Bore 9.6:1 CR FSR Piston (Set of 4)

JE Pistons
JE Pistons VW 2.0T TSI (20mm Pin) 83mm Bore 9.25:1 CR -11.25 Dome FSR Piston Kit (Set of 4)

MGP
Set Of 4 Caliper Covers Engraved Front And Rear MGP Red Finish Silver Characters 1997-2006 Audi A4 MGP Caliper Covers

King Engine Bearings
King Engine Bearings Audi A4 1.8L AEB Performance Main Bearing Set - Size +.25mm
JE Pistons
JE Pistons Volkswagen 2.0T TSI 83.5mm Bore 9.6:1 CR -7.1cc Dish Piston (Set of 4)

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

CP Pistons
CP Piston & Ring Set for Audi/VW 2.0L TSI - Bore (83.0mm) - Size (+0.5mm) - CR (9.5) - Set of 4

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

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

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

CP Pistons
CP Piston & Ring Set for Audi 2.0L TSI (EA888) - Bore (83mm) - Size (+.5mm) Compression Ratio 9.5:1

ARP
ARP VW/Audi 2.0L (FSI) 4cyl Cam Tower Bolt Kit

JE Pistons
JE Pistons VW 2.0T FSI 20MM PIN 83MM 10.0 FSR - Set of 4

JE Pistons
JE Pistons VW 2.0T TSI (23mm Pin) 83mm Bore 10.0:1 FSR Piston (Set of 4)

JE Pistons
JE Pistons VW 1.8T 20V KIT 81.5 Set of 4 Pistons

JE Pistons
JE Pistons VW 1.8T 20V KIT 82.0 Set of 4 Pistons

ARP
ARP VW 1.8L Turbo 20V M11 (with tool) (early AEB) Head Stud Kit

Eagle
Eagle Volkswagen Jetta/Golf/GTI / Audi H-Beam Connecting Rods (Set of 6)

ARP
ARP VW 1.8L Turbo 20V M10 (without tool) Head Stud Kit

CP Pistons
CP Piston & Ring Set for Audi/VW 1.8L 20V - Bore (82.5mm) - Compression Ratio (9.5:1)

JE Pistons
JE Pistons 08-14 VW 2.0TSI (21mm Pin) 83.0mm Bore 9.6:1 CR -7.8cc Dome FSR Series Piston (Set of 4)

JE Pistons
JE Pistons AUDI 1.8T 8.5:1 KIT Set of 4 Pistons

Cometic Gasket
Cometic 2005+ Audi/VW 2.0L 16V BWA/BPY 83.5mm Bore .045in MLS Head Gasket

King Engine Bearings
King Engine Bearings Audi A4 1.8L AEB (Size 0.5) Performance Main Bearing Set

Fluidampr
Fluidampr VW 06-08 2L FSI Motor (6 bolt hole mounting) Steel Internally Balanced Damper

JE Pistons
JE Pistons 13-15 VW/Audi 2.0T TSI (22mm Pin) 83.5mm Bore 10.0:1 CR -5.8cc Dish FSR Piston (Set of 4)

JE Pistons
JE Pistons VW2.0T FS1 10.25:1 KIT Set of 4 Pistons

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

Cometic Gasket
Cometic 98-06 VW/Audi 1.8L Turbo 85mm .060 inch MLS Head Gasket

Cometic Gasket
Cometic Volkswagen 1.8/2.0L 16v TFSi EA888 83mm Bore .056in MLS Cylinder Head Gasket

JE Pistons
JE Pistons VW 2.0T TSI (22mm Pin) 83mm Bore 9.6:1 CR -7.1cc Dish Piston (Set of 4)

Clevite
Clevite Volkswagen 1588cc 1780cc 1781cc 1984cc Engines Con 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