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
8164 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

034Motorsport
HOSE,SIL,BRTHR AEB LWRSILICON

034Motorsport
HEAD GASKET,1.8T 83MM BOREBIG

034Motorsport
Rtr Upg, R, 370x22, B9 S4, Gry

034Motorsport
FLYWHEEL, B7 A4 2.0T RS4

034Motorsport
BUSHING,SUBFRAME,B6-B7 REAR A

034Motorsport
BUSHING,SUBFRAME,B4-B5 REARBI

034Motorsport
K04-15 KKK TURBO,OEM,UPGRADEK
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RS+ Big Brake Pkg, Black, B8

034Motorsport
SPACER,PHENOLIC,1.8T LARGE1.8

034Motorsport
RS+ Big Brake Pkg, Nkl, B9

034Motorsport
Mount Pr, Mtr, Density, B9 A4
034Motorsport
ROD BEARING SET,COATED,I4AUDI
034Motorsport
MAIN BEARING SET,AUDI V6COATE

034Motorsport
HOSE SET,A4 1.8T EARLY BREATH

034Motorsport
S34, Gloss, B8 2.0T

034Motorsport
Mount, Trans, B9 Insert, A4 DS

034Motorsport
MOUNT,TRANS,SD,B6 5 SPEEDSTRE

034Motorsport
Turbo Inlet Hose, B9 2.0T

034Motorsport
Ign Coil, 8pk, Yel, MQB Style

034Motorsport
Ign Coil, 5pk, Red, Style

034Motorsport
Mount, Motor, SD, B8 A4

034Motorsport
FUEL RAIL,1.8T DROP IN KIT

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MOUNT,MOTOR,TD,A4TRACK DENSIT

034Motorsport
FUEL RAIL,1.8T 034 KITFUEL RA

034Motorsport
MOUNT,MOTOR,SS,B5-6-7BILLET S
034Motorsport
ADAPTER,TB 1.8T TO 2.7TTHROTT

034Motorsport
Brace,Chassis,B8-B8.5

034Motorsport
Control Arm Kit, B8 Full Late

034Motorsport
MOUNT,MOTOR,SD,B8 S4

034Motorsport
Bracket, Rr Brake Upgrade, B5

034Motorsport
Rotor Rings, F, 390x34, B9 BBK

034Motorsport
Mount, Rear Diff, Inserts B9

034Motorsport
Brake Pad, SS, Front, B8 S4
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RS+ BBK, Nickel, 1 of 2, B9

034Motorsport
CATCH CAN KIT,B7 2.0TCATCH CA

034Motorsport
Sway Bar Kit, Rear, B8

034Motorsport
HARDWARE KIT, FP34 NIPPLE*OPT

034Motorsport
FUEL PUMP KIT,BILLET ONLY60 M

034Motorsport
BRACKET,SUBFRAME,B5 SWAYBARB5

034Motorsport
Mount, Motorsport, B8 3.0T

034Motorsport
End Links, Rear, MS, B8/B8.5

034Motorsport
HOSE SET,A4 1.8T MID BREATHER

034Motorsport
MOUNT,TRANS,MS,B5 S4MOTORSPOR

034Motorsport
Handling Pac, Stg3, Late B8 A4

034Motorsport
Handling Pac, Stage 1, B9 A4/a

034Motorsport
Ign Coil, 6pk, Red, Style

034Motorsport
Toe Links, Motorsport, B9

034Motorsport
DRIVESHAFT SUPPORT,B6 A4 C5 A6
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CROSSMEMBER,BILLET B5 DIFF SD

034Motorsport
Rebld Kit, D+ Frt End Link, B9

034Motorsport
BYPASS VALVE,710N710N BYPASS

034Motorsport
Toe Link, Density, B9 S4

034Motorsport
END LINK,B8 FRONT SWAYSPHERIC

034Motorsport
Ctrl Arm Kit, Full, TS, B9 S4

034Motorsport
Control Arm Kit, B8 Upper

034Motorsport
Sway Bar Kit, B6-B7 25mm

034Motorsport
HARNESS,1.8T COIL REPAIR

034Motorsport
Ctrl Arms, D+, Frt, Up, B9 A4/

034Motorsport
Rebuild Kit, RS+ Calipers, B9

034Motorsport
Control Arms, Fr, Up Adj, Trac
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