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 Parts
8166 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.
AP Exhaust Products
CATALYTIC CONVERTER UNIVERSAL OBDII CALIFORNIA STD OVAL ANGLED
AP Exhaust Products
CATALYTIC CONVERTER UNIVERSAL OBDII CALIFORNIA STD ROUND O2
Dorman
TIE ROD ASSY

Dorman
TIE ROD END ASSEMBLY
Brembo
Brembo 17+ A4/18+ A5 Front GTS BBK 6 Piston Cast 380x32 2pc Rotor Slotted TY3L-Black HA
Ferrea Racing
Ferrea 06-08 Audi 2.0L FSI Single Spring Kit
Brembo
Brembo 17+ A4 /18+ A5 Front GT BBK 6 Piston Cast 380x32 2pc Rotor Slotted TY3L- Yellow
Brembo
Brembo 17+ A4 /18+ A5 Front GT BBK 6 Piston Cast 380x32 2pc Rotor Slotted TY3L-Silver

Dorman
CLUTCH MASTER CYLINDER
Covercraft
COLGAN ORGL FRONT END BRA

Dorman
THERMOSTAT HOUSING
Brembo
Brembo 17+ A4 /18+ A5 Front GT BBK 6 Piston Cast 380x32 2pc Rotor Slotted TY3L-Black

Dorman
CLUTCH MASTER CYL

Dorman
CONTROL ARM W/ BALL JOINT
Dorman
DUAL FAN ASSEMBLY

Covercraft
COLGAN ORGL FRONT END BRA
Covercraft
COLGAN ORGL FRONT END BRA
Walker Exhaust
MUFFLER ASSEMBLY - QUIET-

Dorman
TURBO OIL INLET

Ferrea Racing
Ferrea VW 2.0T FSI Single Spring 7 Deg Pro CNC Titanium Retainer - Set of 16

Cloyes Gear & Products
ENGINE TIMING CHAIN KIT
Brembo
Brembo 08-17 A5 Front GTS BBK 6 Piston Cast 380x34 2pc Rotor Slotted TY3L-Black HA
Brembo
Brembo 17+ A4/18+ A5/18+ S4/18+ S5 Fr GT BBK 6 Piston Cast 380x34 2pc Rotor Slotted TY3L- Yellow
Brembo
Brembo 17+ A4/18+ A5/18+ S4/18+ S5 Front GT BBK 6 Piston Cast 380x34 2pc Rotor Slotted TY3L-Black

Covercraft
LLOYD MATS ULTIMAT OFFICIAL LICENSE
Brembo
Brembo 17+ A4 /18+ A5 Front GT BBK 6 Piston Cast 380x32 2pc Rotor Slotted TY3L-Red
Dorman
CONTROL ARM

Dorman
HUB ASSEMBLY

Dorman
CONTROL MODULE

WIX
FUEL FILTER MIN ORDER QTY1
Brembo
Brembo 17+ A4/18+ A5 Front GTR BBK 6 Piston Billet 380x32 2pc Rotor Slotted TY3L- Nickel
Walker Exhaust
Catalytic Converter: Variuos Makes and Models; direct fit

Dorman
CAM POSITION SENSOR

Megan Racing
Megan Audi A4 A5 17 Rear Sway Bar (25.4mm)
Covercraft
COLGAN MIRROR BRA

Dorman
LATERAL ARM
Megan Racing
Megan Audi A4 A5 17 Front Sway Bar (32mm)

Cloyes Gear & Products
ENGINE TIMING CHAIN KIT

Cloyes Gear & Products
ENGINE TIMING CHAIN KIT
Covercraft
COLGAN ORGL FRONT END BRA

Dorman
CONTROL ARM
Dorman
ENGINE OIL COOLER

Megan Racing
Megan Audi A4 09-13 A5 08-13 S5 08-11 Front Sway Bar 30mm 3pcs

Megan Racing
Megan Audi A4 A4 S4 A5 S5 B8 8K 08-14 Front Lower Arm Front 2pcs
Dorman
CONTROL ARM

Dorman
NEW MASTER CYLINDER

Megan Racing
Megan Audi A4 A5 17 Lowering Springs (EXC Wagon)

Megan Racing
Megan Lowering Springs A4 96-01 FWD 25 LBs Spring Rate: Front K1-146 K2-224 Rear K1-65 K2-168

Dorman
NEW MASTER CYLINDER

Planted Technology
Aud R8 2nd Generation

Dorman
NEW MASTER CYLINDER
Brembo
DISC BRAKE ROTOR

Dorman
CONTROL ARM

Ferrea Racing
Ferrea Audi 2.0T FSI 16V Single Valve Spring - Set of 16
Dorman
ENGINE OIL PAN

Champion Race Plugs
CHAMPION IRIDIUM
Dorman
ABS MODULE
Dorman
WINDSHIELD WIPER TRANSMISSION ASSEM
Dorman
DUAL FAN ASSEMBLY

Dorman
BRAKE HYDRAULIC HOSE
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