QUATTRO MEETS PRACTICALITY

B5 through B9 — Audi's compact sedan with available Quattro AWD and turbo power.

Audi A4 HERITAGE

THE QUATTRO COMPACT

The Audi A4 has been the German compact sport sedan since 1994. The B5 (1.8T) launched the tuner-friendly chassis, the B6/B7 added the K04 turbo upgrade culture, and the B8/B9 brought EA888 turbocharged 2.0T engines that share parts with the VW Golf R / Jetta GLI.

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

3,135
Parts that fit
3,000+
MOTORMIA Builds
EBC
#1 brand by SKUs
$711
Average MSRP

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.

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30-Day Returns
NGK wideband gauge

NGK

NGK Audi A4 2006-2001 Direct Fit 5-Wire Wideband A/F Sensor

NGK wideband gauge

NGK

NGK Audi A4 2009-2005 Direct Fit 5-Wire Wideband A/F Sensor

NGK auto part

NGK

NGK Audi A4 1999-1996 Direct Fit Oxygen Sensor

NGK wideband gauge

NGK

NGK Audi A6 2009-2006 Direct Fit 5-Wire Wideband A/F Sensor

NGK auto part

NGK

NGK Audi A4 2001-2000 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A6 2009-2006 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A6 2011-2010 Direct Fit Oxygen Sensor

NGK auto part

NGK

NGK Audi A4 2010-2009 Direct Fit Oxygen Sensor

NGK wideband gauge

NGK

NGK Audi A3 2013-2010 Direct Fit 5-Wire Wideband A/F Sensor

NGK wideband gauge

NGK

NGK Audi A8 Quattro 2006-2004 Direct Fit 5-Wire Wideband A/F Sensor

NGK auto part

NGK

NGK Volkswagen Touareg 2007-2004 Direct Fit Oxygen Sensor

aFe air filter

aFe

aFe MagnumFLOW Air Filters OER PDS A/F PDS Audi/VW 06-12 V6-3.2L/3.6L

aFe silver throttle body

aFe

aFe Silver Bullet Throttle Body Spacers TBS Audi A4 (B8) 09-16 I4/2.0L Turbo

aFe air filter

aFe

aFe MagnumFLOW Air Filters OER Pro DRY S 09-12 Audi A4 V6 3.0L / 09 A4 V6 3.2L

aFe air filter

aFe

aFe MagnumFLOW Air Filters OER P5R A/F P5R BMW 5-Ser 7-Ser 93-06 V8

aFe air filter

aFe

aFe MagnumFLOW Air Filters OER PDS A/F PDS VW Passat 90-97

aFe oil filter

aFe

aFe Pro GUARD HD Oil Filter (4 Pack)

aFe air filter

aFe

aFe MagnumFLOW Air Filters OER P5R A/F P5R Audi/VW 06-12 V6-3.2L/3.6L

aFe throttle controller

aFe

aFe Power Sprint Booster Power Converter Audi A4/S4/RS4/A5/S5/RS5/A6/S6/RS6 08-15

aFe air filter

aFe

aFe MagnumFLOW Air Filters OER P5R A/F P5R Audi A4 02-09

aFe oil filter

aFe

aFe 15-20 Audi A3 17-20 A4 18-21 A5 16-21 A6 Pro GUARD Oil Filter

Sprint Booster V3 throttle controller

aFe

aFe 16-23 Audi A4/A5 / 21-23 Audi A5 Quattro/A6 L4 2.0L (t) Sprint Booster V3 Power Converter

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