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.

APR Tuning
Wheel Lug Bolts Set of 10 40 mm APR

APR Tuning
Ignition Coils Fits Various Audi/Porsche/VW Models Blue APR

APR Tuning
Wheel Lug Bolts Set of 10 45 mm APR

ACCEL
Direct Ignition Coil Supercoil Volkswagen / Audi 1.8L I4 Direct OEM Replacement 15 Percent More Spark Energy Silicone Magnetic Steel Core Yellow Each ACCEL

Gates
Gates 09-17 Volkswagen Tiguan 4-Cyl. 2.0L Water Pump Automotive Timing Belt

Supertech
Supertech 81mm Bore Piston Rings - 1x3.10 / 1.2x3.40 / 2.8x3.10mm High Performance Gas Nitrided

Supertech
Supertech Audi/VW 2.0TFSI Single Valve Spring - Single (Drop Ship Only)

Bosch
Bosch Fuel Pressure Regulator (OE 078133534C)

Bosch
Bosch Ignition Trigger Module

Supertech
Supertech Audi 1.8T/2.7T Exhaust Cam Follower 33.5x25.8x15.5mm Stem - Single (D/S Only)

Victor Reinz
MAHLE Original Mercruiser 3.7L Push Rod Cover Set

Supertech
Supertech Toyota 4AGE 20V / VW 1.8T AEB / 2.7T APB 5V Intake Valve Spring

Supertech
Supertech Audi 1.8T Manganese Bronze Intake/Exhaust Valve Guide Oversize OD 11.075mm - Set of 8

Supertech
Supertech 81.5mm Bore Piston Rings - 1x3.10 / 1.2x3.40 / 2.8x3.10mm High Performance Gas Nitrided
Torque Solution
Torque Solution Blow Off Valve Adapter: 2015+ VW/Audi 1.8T / 2.0T

Supertech
Supertech Audi/VW 1.8T AEB Spring Seat Locator - Set of 8

H&R
H&R 09-16 Audi A4 Quattro/S4 (AWD) Sway Bar Bushing (for 71361)

Radium Engineering
Radium Engineering VW/Audi EA888 Fuel Rail Plumbing / Port Injection

Hella
Hella 2013-2016 Audi S4 Fog Light Right

Hella
Hella 2013-2016 Audi S4 Fog Light Left

PowerStop
Power Stop 14-17 Audi SQ5 Rear Z23 Evo Sport Pad w/Hardware

Supertech
Supertech Audi/VW 1.8T 5V Black Nitrided Intake Valve - Single (Drop Ship Only)

Supertech
Supertech VW 1.8T AEB / 2.7T APB Sodium Filled Inconel Exhaust Valve - +1mm Oversize - Single

Supertech
Supertech Titanium Retainer for SPR-H1000 Series - Single (Drop Ship Only)

Supertech
Supertech Audi 1.8T/2.7T Manganese Bronze Intake/Exhaust Valve Guide Oversize OD 11.075mm

Supertech
Supertech Audi/VW 1.8T 5V Inconel Exhaust Valve - +1mm Oversize - Single (Drop Ship Only)

SuperPro
SuperPro Audi Sway Bar Mount 14mm Kit

Supertech
Supertech VW Titanium Retainer for 8mm Valve Stem Triple Groove

Supertech
Supertech Titanium Retainer for Audi 5V Intake Spring SPR-A2095 (12)

Supertech
Supertech Audi/VW 1.8T 5V Triple Groove Black Nitride Exhaust Valve - Single (Drop Ship Only)

Supertech
Supertech Titanium Retainer for Audi R8 V8/V10 - Single (Drop Ship Only)

SPC Performance
SPC Performance Boot Replacement Kit - 2

Stoptech
StopTech Audi Front Stainless Steel Brake Line Kit

Whiteline
Whiteline Plus 97-05 VAG MK4 A4/Type 1J Front Lower Inner Control Arm Bushing Kit -Standard Replacem

Go Fast Bits
GFB Mach 2 Atmosphere Conversion Kit-Changes T9107 or T9125 from Recir to Atmosphere

K&N Engineering
K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter

ARP
ARP VW 1.8L & 2.0L Water-Cooled Rod Bolt Kit (Set of 2)

King Engine Bearings
King Engine Bearings Audi A4 1.8L AEB (Size +.50 Oversized) Main Bearing Set

Stoptech
StopTech Street Select Brake Pads - Rear

KYB
KYB Shocks & Struts Strut Mount Front 09-15 Audi A4/A5

Hella
Hella Bulb H1 12V 55W P14.5s T2.5 LONGLIFE

WeatherTech
WeatherTech 2017+ Audi A4 Sedan Front Side Window Deflectors - Dark Smoke

Hella
Hella Optilux H1 100W XB Extreme White Bulbs (Pair)

Hella
Hella Bulb H9 12V 65W Pgj195 T4 Sb

Bilstein
Bilstein 96-99 Audi A4 Quattro B3 OE Replacement Coil Spring - Front

Stoptech
StopTech 09 Audi A4 Sedan / 08-10 A5-S5 Rear Stainless Steel Brake Line Kit

Hella
Hella Bulb 7225 12V 21/4W Baz15D S8 (2)

Hella
Hella H1 12V 55W Hella High Performance Xenon Bulb (Pair)

Advanced Clutch
ACT 1997 Audi A4 Release Bearing

Stoptech
StopTech Audi Rear Stainless Steel Brake Line Kit

NGK
NGK Standard Spark Plug Box of 4 (BKUR6ET)

ACL
ACL VW 4 1780-1983cc 1983-on Engine Connecting Rod Bearing Set

ACL
ACL VW 4 1780-1983cc 1983-on Engine Connecting Rod Bearing Set

ACL
ACL 75-05 Volkswagen 1.0-1.9L Standard Size Thrust Washers

AutoMeter
Autometer 96-98 Audi A4 52mm Single Pod (Black)

NGK
NGK Multi-Ground Spark Plug Box of 4 (PFR7W-TG)

NGK
NGK V-Power Spark Plug Box of 4 (BKR6E)

NGK
NGK Laser Platinum Spark Plug Box of 4 (PFR6U-11G)

NGK
NGK 2004-02 Audi A6 Quattro COP Pencil Type Ignition Coil

NGK
NGK Audi A4 1999-1997 Direct Ignition Coil Boot
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