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.
A1 REMFG INC
FRICTION CHOICE CALIPERS
TYC
0914 AD A.4 2.0L RAD & COND CFA

Corbeau
Corbeau Sportline RRS Black Vinyl Diamond/Black Stitch w/ Seat heater Installed in Both

TYC
CAPA 0508 AD A4 SDN QTR TAIL LIGHT ASSY LH
A1 REMFG INC
NEW WINDOW LIFT REGULATOR

TYC
1316 AD A4/1317 A5 W/O CURVE LTG HID HEADLIGHT ASSY
TYC
LH TAILLAMP ASSY SEDAN AUDI A4/S4 0508; RS4 0508

TYC
CAPA 0508 AD A4 SDN QTR TAIL LIGHT ASSY RH

SPEC D TUNING
PROJECTOR HEADLIGHT BLACK R8 STYLE
A1 REMFG INC
CV DRIVE AXLE
Sherman Parts
CAPA HOOD PANEL ASSY AUDI A4/S4 0918 SEDAN/WAGON
Trans-Dapt
OLDS AND PONTIAC ENGINE KIT; OFFSET PCV; OLDS 330455 AND PONTIAC 403CHROME195964 PONTIAC ENGINES
A1 REMFG INC
RIGHT HALF SHAFT

Ultra Wheel
458 SERIES PROPHECY FWD 20X8.5 BK

Ultra Wheel
458 SERIES PROPHECY FWD 20X8.5 GN

TYC
0208 AD A.4 1.8/2.0L RAD & COND CFA (w/o FCM)

A1 REMFG INC
CV DRIVE AXLE

A1 REMFG INC
VW PASSAT 99-98 F/R

A1 REMFG INC
FRICTION CHOICE CALIPERS

TYC
0508 AD A4/S4 2.0/3.2L A/C CONDENSER (PFC)

Ultra Wheel
461 SERIES EXODUS FWD 20X8.5 BK
Samco
Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (BLACK)

TYC
RH TAILLAMP ASSY SEDAN AUDI A4/S4 0508; RS4 0508

A1 REMFG INC
IMP UNLOADED CALIPERS
Samco
Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (WHITE)
Samco
Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (SOLARORANGECAMO)
Samco
Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (URBANCAMO)

Samco
Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (WHITE)

TYC
21C AD A.4 SDN DENSO (FROM 32221) 5.5MM W/ RADIATOR/CONDENSOR (PFC)
Samco
Samco Audi A4 Turbo B6 AVJ/AMB/BFB (3) Turbo Kit (BLAZE)

SPEC D TUNING
PROJECTOR HEADLIGHT CHROME R8 STYLE

Samco
Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (BLAZE)
A1 REMFG INC
UNLOAD BRAKE CALIPER IMP

Konig Wheels
Konig Dial In 15x9 4x100 ET35 Gloss Black
Sherman Parts
LOWER ENGINE COVER 2.0L; REAR PAN AUDI A4 0916 CAPA
SPEC D TUNING
PROJECTOR HEADLIGHT CHROME R8 STYLE

Primax Wheels
20X9 5-120 +35 B

TYC
0912 AD A.4/S.4 SDN/0911 A.6/S.6 F.L LH

TYC
1718 AD A.4 PWR HT W/ SIG W/ SIDE A. PTM MIR RH

TYC
0208 AD A.4 PWR HT PTM w/o MEM MIR LH
TYC
0616 VW JETTA/0622 PASSAT 2.0L COMPRESSOR

TYC
A/C EVAPORATOR CORE AUDI A4/S4 SEDAN/WAGON 0912
Samco
Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (SOLARORANGECAMO)

Garrett Turbos
TURBOCHARGER ORIGINAL REMAN WITH KIT GT2052V VW GROUP
Samco
Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (RED)
Samco
Samco Audi A4 1800 Turbo FWD (2001) Man Trans AWM B5 US Spec (4) Turbo Kit (GREEN)

TYC
0509 AD A.4 2.0L L4 AT 1R PA RAD

OMP Racing
OMP 06-08 Audi A4/S4 - Driver Bracket

Samco
Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (URBANCAMO)
A1 REMFG INC
AUDI A4,A6,S6 06-03 F/L

Samco
Samco Audi A4 1800 Turbo B5 AEB/ATW/AWM/AVJ (1) Induction Hose (GUNMETALGREY)
Sherman Parts
CAPA LOWER ENGINE COVER W/O SLINE PKG; FRT AUDI A4 2020

Primax Wheels
521 20X8.5 5X114.3
A1 REMFG INC
CV DRIVE AXLE

Sherman Parts
HOOD PANEL ASSY AUDI A4 20172020; AUDI A4 QUATTRO 20172021
TYC
0205 AD A.4/S.4 GEN2;SDN T.L LH
TYC
9904 VW PASAT 2.8L (Opt;120A)(6S) ALT
Sherman Parts
FRONT BUMPER COVER; W/O SLINE PKG; W/O HEADLAMP WASHER; W/O WARNING SYSTEM; PRIME; A4 1316

TYC
ALTERNATOR AUDI A4 2.0L 0509

A1 REMFG INC
NEW CV DRIVE AXLES
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