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:air and fuel Parts
502 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

aFe
aFe MagnumFORCE Intakes Stage-2 PDS AIS PDS Audi A4 06-08 L4-2.0L (t)

Injen
Injen 09-16 Audi A4 2.0L (t) Black Cold Air Intake

DeatschWerks
DeatschWerks 02-08 Mini Cooper S 1.6L Supercharged 550cc Injectors - Set of 4

Aeromotive
Aeromotive Fuel Rails - Volkswagen 1.8L Turbo

AEM
AEM 13-15 Audi A4 2.0L / 14-15 A5 2.0L Cold Air Intake

aFe
aFe MagnumFLOW Air Filters OER PDS A/F PDS Audi A4 09-11 / Q5 09-10 L4-2.0L (t)

aFe
aFe Momentum GT Intakes Stage-2 P5R AIS 9-16 Audi A4 (B8) L4-2.0L

aFe
aFe MagnumFORCE Intakes Stage-2 P5R AIS P5R Audi A4 02-05 L4-1.8L (t)

aFe
aFe Momentum GT Cold Air Intake System w/ Pro 5R Media Audi A4/Quattro (B9) 16-19 I4-2.0L (t)

aFe
aFe Momentum GT Pro Dry S Intakes Stage-2 9-16 Audi A4 (B8) L4-2.0L

aFe
aFe MagnumFLOW Air Filters OER P5R A/F P5R Audi A4 09-11 / Q5 09-10 L4-2.0L (t)

aFe
aFe POWER Momentum GT Pro Dry S Intake System 16-19 Audi A4/Quattro I4-2.0L (T)

aFe
aFe MagnumFORCE Intakes Stage-2 P5R AIS P5R Audi A4 06-08 L4-2.0L (t)

034Motorsport
HOSE,SIL,BRTHR A4 B6 PRV OUTS

034Motorsport
HOSE,SIL,BRTHR AEB L-HOSESILI

034Motorsport
Hose,Sil,Brthr A4 L-HoseRepla

034Motorsport
HOSE,SIL,AUDI 1.8T N75FITS A

034Motorsport
HOSE,SIL,BRTHR A4 EARLY CHKBR

034Motorsport
HOSE,SIL,BRTHR A4 B6 INLETB6

Mahle
Mahle Engine Air Filter LX 593 1

STANDARD IGN
INTRMTR VACUUM REGULATOR

Walker Products Inc. - Sensors
MANIFOLD ABSOLUTE PRESSURE SENSOR

MOTORAD
TETHERED FUEL CAP

Walker Products Inc. - Sensors
MANIFOLD ABSOLUTE PRESSURE SENSOR

Walker Products Inc. - Sensors
IGNITION KNOCK (DETONATION) SENSOR
Walker Products Inc. - Sensors
PIGTAIL KIT

Walker Products Inc. - Sensors
ENGINE CAMSHAFT POSITION SENSOR

Walker Products Inc. - Sensors
AIR CHARGE TEMPERATURE SENSOR

STANDARD IGN
OXYGEN SENSOR CN
Walker Products Inc. - Sensors
IGNITION KNOCK (DETONATION) SENSOR

Walker Products Inc. - Sensors
VEHICLE SPEED SENSOR
Fram
FLEX PANEL AIR FILTER 2PK

Fram
PANEL AIR FILTER

Dana
INTAKE MANIFOLD GASKET
Dana
THROTTLE BODY GASKET
Dana
THROTTLE BODY GASKET

Dana
INTAKE MANIFOLD GASKET

Dana
FUEL INJECTOR O-RING KIT

Dorman
PIGTAIL OR SOCKET

WIX
FUEL FILTER MIN ORDER QTY12
Dorman
BRAKE HOSE
WIX
AIR FILTER

WIX
CABIN AIR FILTER MIN ORDER QTY1
WIX
CABIN AIR FILTER

WIX
AIR FILTER
Torque Solution
Torque Solution Thermal Throttle Body Gasket: Audi A4 Quattro 1997-2001
Bosch
GASOLINE INJECTOR

Clevite
TURBOCHARGER MOUNTING GASKET SET
Mahle
~(0 lbs. 96X4X4)~ Turbo Oil Drain AUDI / VOLKSWAGEN 1781CC 1.8L 2671CC 2.7L 1999-2006

Mahle
AIR FILTER ELEMENT

Bosch
PRESSURE SENSOR

Bosch
CABIN AIR FILTER

Mahle
~(0.2 lbs. 16X6X0)~ Intake Manifold Gasket 13-17 Audi/VW 1.8L/2.0L

Hella
SENDER UNIT INTAKE AIR TEMPERATURE

Denso
AIR FILTER

Mahle
~(0 lbs. 7X7X0)~ Volkswagen ABA SOHC 2.0L 1994-1999

Mahle
Intake Manifold Set Audi:9090 Quattro100100 Quattro w 2771ccAAH V6 Eng.(92-95)(int)

Mahle
VW AUDI 2771CC 2.8L DOHC 30V 1997-2005
Clevite
AUDI 3.0L 3.2L DOHC 24V 20052012 PLENUM CHAMBER

Mahle
~(0.9 lbs. 11X9X1)~ Audi A4 2.0L TDI 3.2L A5 3.2L Q5 3.2L S5 4.2L 08-09
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