QUATTRO MEETS PRACTICALITY

B5 through B9 — Audi's compact sedan with available Quattro AWD and turbo power.

Audi A4 HERITAGE

THE QUATTRO COMPACT

The Audi A4 has been the German compact sport sedan since 1994. The B5 (1.8T) launched the tuner-friendly chassis, the B6/B7 added the K04 turbo upgrade culture, and the B8/B9 brought EA888 turbocharged 2.0T engines that share parts with the VW Golf R / Jetta GLI.

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

3,135
Parts that fit
3,000+
MOTORMIA Builds
EBC
#1 brand by SKUs
$711
Average MSRP

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.

Free Shipping
30-Day Returns
CP Pistons auto part

CP Pistons

CP Piston & Ring Set for Audi/VW 1.8L 20V - Bore (81.5mm) - CR (8.5:1) - Set of 4

JE Pistons auto part

JE Pistons

JE Pistons VW 1.8T 20V 83mm Bore (+2mm Oversize) 9.25:1 CR -7.7cc Dome Piston Kit (Set of 4)

Wiseco auto part

Wiseco

Wiseco VW/Audi Turbo Conversion 20V Cyl Head 81.0mm Bore 8.5 CR Pistons (Inc Rings)

JE Pistons auto part

JE Pistons

JE Pistons Volkswagen 2.0T TSI 83mm Bore 10.1 CR -5.2cc Dish Piston (Set of 4)

JE Pistons auto part

JE Pistons

JE Pistons VW 2.0T FSI 85.5mm Bore -13.3cc Dome 83.5 Kit - (Single Piston)

CP Pistons auto part

CP Pistons

CP Piston & Ring Set for Audi/VW 1.8L 20 Valve - Bore (82.5mm) - Size (+1.5) - CR (8.5) - Set of 4

JE Pistons auto part

JE Pistons

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

JE Pistons auto part

JE Pistons

Volkswagen 2.0L Turbo, 83.00 Bore, Dish, Set of 1

JE Pistons auto part

JE Pistons

Volkswagen 2.0L Turbo, 83.50 Bore, Flat, Set of 4

CP Pistons auto part

CP Pistons

CP Piston & Ring Set for Audi / VW - Bore (82mm) - Compression Ratio (8.5)

ACL auto part

ACL

ACL VW/Audi 1781cc/1984cc Standard Size High Performance Rod Bearing Set

ACL auto part

ACL

ACL Volkswagen EA888 Gen 3 TFSI 4cyl Turbo Standard Size Race Series Main Bearings

ACL auto part

ACL

ACL Volkswagen EA888 Gen 3 TFSI 4cyl Turbo .25 Size Race Series Main Bearings

Drain Plug Kit, Mag, Mk5-6

034Motorsport

Drain Plug Kit, Mag, Mk5-6

ADAPTER,BLOCK BREATHER 1.8TTH

034Motorsport

ADAPTER,BLOCK BREATHER 1.8TTH

M

Mahle

Mahle Engine Intake Valve 029 VE 31372 000

Mahle Engine Exhaust Valve 029 VA 31237 000

Mahle

Mahle Engine Exhaust Valve 029 VA 31237 000

G

Goodyear

SERPENTINE BELT MULTI VBELTK MULTI VBELT

G

Goodyear

SERPENTINE BELT MULTI VBELTK MULTI VBELT

G

Goodyear

SERPENTINE BELT MULTI VBELTK MULTI VBELT

G

Goodyear

SERPENTINE BELT MULTI VBELTK MULTI VBELT

INTERMOTOR VARIABLE VALVE TIMING SO

STANDARD IGN

INTERMOTOR VARIABLE VALVE TIMING SO

M

MOTORAD

OIL CAP

STANDARD IGN auto part

STANDARD IGN

PCV VALVE

D

DAYCO HYDRAULIC

TIMING BELT

D

DAYCO HYDRAULIC

FAN BELT

G

Goodyear

ACCESSORY DRIVE BELT IDLER PULLEY FEADIDLER PULLEY

D

DAYCO HYDRAULIC

POLYRIB BELT

TIMKEN auto part

TIMKEN

SEAL

D

DAYCO HYDRAULIC

V-BELT TOP COG DAYCO

G

Goodyear

SERPENTINE BELT MULTI VBELTK MULTI VBELT

STANDARD IGN auto part

STANDARD IGN

ENG BREATHER HOSE

FOUR SEASONS auto part

FOUR SEASONS

IDLER PULLEY

DELPHI auto part

DELPHI

ENGINE CAMSHAFT POSITION SENSOR

P

PROGRESS INT

FRESH FOOD CHOPPER

DELPHI auto part

DELPHI

ENGINE CAMSHAFT POSITION SENSOR

Fram oil filter

Fram

OIL FILTER TOUGH GUARD C

Fram oil filter

Fram

OIL FILTER

Fram oil filter

Fram

OIL - CARTRIDGE OIL FILTER

Dana auto part

Dana

ENGINE HEAD GASKET

OIL FILTER CARTRIDGE

Fram

OIL FILTER CARTRIDGE

CARTRIDGE OIL FILTER

Fram

CARTRIDGE OIL FILTER

D

Dana

VALVE COVER GASKET

D

Dana

HEAD BOLT SET

TG3600T 12/CS EXTRA-GUARD

Fram

TG3600T 12/CS EXTRA-GUARD

D

Dana

ENGINE CRANKSHAFT SEAL

D

Dana

ENGINE OIL SUMP GASKET

SPINDLE BOLT

Dorman

SPINDLE BOLT

C

Cloyes Gear & Products

TIMING BELT AUDI 1998

Ferrea Racing titanium intake system

Ferrea Racing

Ferrea VW 2.0T TS Single Spring 7 Deg Pro CNC Intake Titanium Retainer - Single

C

Cloyes Gear & Products

ENGINE OIL PUMP CHAIN TENSIONER

OIL FILTER

WIX

OIL FILTER

OIL FILTER

WIX

OIL FILTER

VW PCV DIAPHRAGM

Dorman

VW PCV DIAPHRAGM

ENGINE OIL PUMP CHAIN TENSIONER

Cloyes Gear & Products

ENGINE OIL PUMP CHAIN TENSIONER

BELT IDLER PULLEY

Cloyes Gear & Products

BELT IDLER PULLEY

ENGINE CYLINDER HEAD BOLT SET

Dana

ENGINE CYLINDER HEAD BOLT SET

ENGINE CYLINDER HEAD BOLT SET

Dana

ENGINE CYLINDER HEAD BOLT SET

Ferrea Racing titanium springs

Ferrea Racing

Ferrea VW 2.0T FSI Single Spring 7 Deg Pro CNC Titanium Retainer - Single

W

WIX

OIL FILTER

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