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.

Bosch
VACUUM TEST KIT
Bosch
MAP SENSOR

Bosch
BOSCH OXYGEN SENSOR
Hella
VACUUM PUMP VAG

Bosch
OXYGEN SENSOR

K&N Engineering
INTL INTAKE KIT AUDI

Dorman
ELECTRIC AIR PUMP

Denso
O2 OXYGEN SENSOR

Denso
O2 OXYGEN SENSOR

Hella
AIR MASS SENSOR

K&N Engineering
PERF.KIT AUDI A4/ TDI L4

Hella
THROTTLE BODY
Denso
O2 OXYGEN SENSOR

Bosch
OXYGEN SENSOR

Bosch
OXYGEN SENSOR

Bosch
OXYGEN SENSOR

Bosch
THROTTLE BODY

Hella
ACCELERATOR PEDAL SENSOR

Hella
FUEL AND VACUUM PUMP

NGK
IGNITION KNOCK (DETONATION) SENSOR

Denso
O2 OXYGEN SENSOR

Bosch
COMMON RAIL PUMP

NGK
OE TYPE 5-WIRE WIDEBAND A/F SENSOR
Mahle
Intercooler

Dorman
SECONDARY AIR INJECTION PUMP

K&N Engineering
K&N Audi A4 1.8L Drop In Air Filter

K&N Engineering
K&N Replacement Air FIlter 12-13 VW Golf VII 1.6L/2.0L DSL / 13 Audi A3 1.6L/2.0L DSL/13 A3 1.8L F/I

Injen
Injen 17-19 Audi A4 2.0T Wrinkle Red Short Ram Air Intake

K&N Engineering
K&N 2014 Audi A4 2.0L Turbo Typhoon Air Intake

Fel-Pro
Fel-Pro Audi Q5 MS 97529 Fuel Injection Plenum Gasket

Fel-Pro
Fel-Pro Volkswagen Tiguan 61847 Fuel Injection Throttle Body Mounting Gasket

Fel-Pro
Fel-Pro Audi Q7 MS 97524 Engine Intake Manifold Gasket Set

Fel-Pro
Fel-Pro Audi Q5 61844 Fuel Injection Throttle Body Mounting Gasket

Gates
Gates 98-05 Volkswagen Passat 4-Cyl. 1.8L Suction Pump Emission Control Hose

Gates
Gates 06-09 Volkswagen Jetta 4-Cyl. 2.0L Oil Separator To PCV Valve Emission Control Hose

Gates
Gates 00-05 Volkswagen Passat 4-Cyl. 1.8L Oil Separator To PCV Valve Emission Control Hose
Gates
Gates 98-02 Volkswagen Passat V-6 2.8L Valve Cover To Intake Tube Emission Control Hose
Gates
Gates 06-09 Volkswagen Jetta 4-Cyl. 2.0L PCV Valve To Intake Emission Control Hose

Gates
Gates 00-05 Volkswagen Passat 4-Cyl. 1.8L Turbo Oil Drain Line Turbocharger Oil Line

Gates
Gates 09-16 Audi A4 4-Cyl. 2.0L Turbo Oil Feed Line Turbocharger Oil Line

Injector Dynamics
Injector Dynamics 1750-XDS - 60mm Length - 11mm Blue Top - Denso Lower Cushion (Set of 6)

DeatschWerks
Deatschwerks Set of 4 Bosch EV14 1250cc Injectors for Audi A4/TT 1.8L Turbo 01-06
Gates
Gates 13-15 Audi A4 4-Cyl. 2.0L Hot Side Turbocharger Hose
Gates
Gates 05-09 Audi A4 4-Cyl. 2.0L Hot Side Turbocharger Hose

Gates
Gates 05-09 Audi A4 4-Cyl. 2.0L Right Cold Side Turbocharger Hose

Gates
Gates 09-16 Audi A4 4-Cyl. 2.0L Pipe To Engine Cold Side Turbocharger Hose

Gates
Gates 02-06 Audi A4 4-Cyl. 1.8L Cold Side Turbocharger Hose

Gates
Gates 05-09 Audi A4 4-Cyl. 2.0L Pipe To Left Intercooler Cold Side Turbocharger Hose

Gates
Gates 97-01 Audi A4 4-Cyl. 1.8L Hot Side Turbocharger Hose
Gates
Gates 97-01 Audi A4 4-Cyl. 1.8L Cold Side Turbocharger Hose

Gates
Gates 99-05 Volkswagen Passat 4-Cyl. 1.8L Turbo To Pipe Hot Side Turbocharger Hose

Fel-Pro
Fel-Pro 15-17 Ford F-150/07-12 Mustang Fuel Injector O-Ring Kit

Fel-Pro
Fel-Pro Volkswagen Jetta 61491 Fuel Injection Throttle Body Mounting Gasket

Fel-Pro
Fel-Pro Volkswagen Tiguan 61462 Fuel Injection Throttle Body Mounting Gasket

Fel-Pro
Fel-Pro Volkswagen Passat MS 96890 Engine Intake Manifold Gasket Set

Fel-Pro
Fel-Pro Audi A4 Quattro 61330 Fuel Injection Throttle Body Mounting Gasket
Fel-Pro
Fel-Pro Volkswagen Jetta 61092 Fuel Injection Throttle Body Mounting Gasket

Fel-Pro
Fel-Pro Volkswagen Tiguan 73112 Turbocharger Drain Gasket
Gates
Gates 09-16 Audi A4 4-Cyl. 2.0L Cold Side Turbocharger Hose

Wagner Tuning
Wagner Tuning 09-16 Audi A4 B8 (Allroad) 2.0TDI Competition Intercooler Kit
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
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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