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 ignitions and electrical Parts

301 parts available

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

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CRANKSHAFT SENSOR

Dorman

CRANKSHAFT SENSOR

PLATINUM POWER SPARK PLU

Champion Race Plugs

PLATINUM POWER SPARK PLU

D

Dorman

RETAINER FITS 24MM HEX

IRIDIUM SPARK PLUGS BOX

Champion Race Plugs

IRIDIUM SPARK PLUGS BOX

SPINDLE BOLT

Dorman

SPINDLE BOLT

D

Dorman

HOOD INSULATION

WATER OUTLET

Dorman

WATER OUTLET

OILPRESSURE SWITCH

Hella

OILPRESSURE SWITCH

OIL PRESSURE SWITCH

Hella

OIL PRESSURE SWITCH

CRANKSHAFT SENSOR

Hella

CRANKSHAFT SENSOR

TPMS VALVE CORE KIT

Dorman

TPMS VALVE CORE KIT

CRANKSHAFT SENSOR

Bosch

CRANKSHAFT SENSOR

RETAINING RING

Bosch

RETAINING RING

B

Bosch

BEARING SLEEVE

PROTECTIVE CAP

Bosch

PROTECTIVE CAP

BULB 12V 29/8W W3X16Q S8

Hella

BULB 12V 29/8W W3X16Q S8

B

Bosch

BUSHING

SENDER UNIT INTAKE AIR TEMPERATURE

Hella

SENDER UNIT INTAKE AIR TEMPERATURE

CRANK SHAFT PULSE SENSOR

Hella

CRANK SHAFT PULSE SENSOR

BRUSH HOLDER

Bosch

BRUSH HOLDER

ROT.-SPEED SENSOR

Bosch

ROT.-SPEED SENSOR

EL FIELD RHEOSTAT

Bosch

EL FIELD RHEOSTAT

CABIN AIR FILTER

Denso

CABIN AIR FILTER

SPARK PLUG

Bosch

SPARK PLUG

IGNITION COIL

Bosch

IGNITION COIL

B

Bosch

PARTS SET

KNOCK SENSOR

Bosch

KNOCK SENSOR

NGK Laser Iridium Spark Plug Box of 4 (SILFER8C7ES)

NGK

NGK Laser Iridium Spark Plug Box of 4 (SILFER8C7ES)

Hella auto part

Hella

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

NGK auto part

NGK

NGK Standard Spark Plug Box of 4 (BKUR6ET)

NGK auto part

NGK

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

NGK auto part

NGK

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

NGK auto part

NGK

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

NGK auto part

NGK

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

NGK auto part

NGK

NGK Audi A4 1999-1997 Direct Ignition Coil Boot

NGK auto part

NGK

NGK Double Platinum Spark Plug for Audi/VW Box of 4 (PFR6Q)

NGK auto part

NGK

NGK Iridium Spark Plug Box of 4 (IFR6Q-G)

NGK auto part

NGK

NGK Copper Core Spark Plug Box of 4 (BKUR6ET-10)

NGK auto part

NGK

NGK Nickel Spark Plug Box of 4 (BKR6EKUB)

HARNESS,1.8T COIL REPAIR

034Motorsport

HARNESS,1.8T COIL REPAIR

0

034Motorsport

D+TUNE, 2.0T Simos 18.4, Stg2

0

034Motorsport

D+TUNE, 2.0T Simos 18.4, Stg1

D+TUNE, 2.0 TFSI B8 ST1

034Motorsport

D+TUNE, 2.0 TFSI B8 ST1

0

034Motorsport

D+TUNE, EA113HO 20T FSI LO420

0

034Motorsport

D+TUNE, B9 A4/A5 DL382 Stage 1

0

034Motorsport

D+TUNE, B7 A4 2.0T FSI, K04

0

034Motorsport

D+TUNE, EA113 LONG 20T FSI ST1

0

034Motorsport

D+TUNE, 2.0T B9 Q5, Stg2

Placeholder image

Putco

Putco Plug and Play Load Resistor System - Fits 3157

IDATASTART REMOTE START THARNESS FOR SELECT AUDI PORSCHE & VOLKSWAGEN MODELS 0

Firstech

IDATASTART REMOTE START THARNESS FOR SELECT AUDI PORSCHE & VOLKSWAGEN MODELS 0

MODULE

STANDARD IGN

MODULE

ACCELERATOR PEDAL SENSOR

STANDARD IGN

ACCELERATOR PEDAL SENSOR

INTERMOTOR CLOCK SPRING

STANDARD IGN

INTERMOTOR CLOCK SPRING

S

STANDARD IGN

VACUUM PUMP

ENGINE OIL LEVEL SENSOR CONNECTOR

STANDARD IGN

ENGINE OIL LEVEL SENSOR CONNECTOR

R

REMY

REMANUFACTURED ALTERNATOR

R

REMY

REMANUFACTURED ALTERNATOR

R

REMY

IMPORT ALTERNATOR

R

REMY

REMANUFACTURED ALTERNATOR

REMANUFACTURED STARTER

REMY

REMANUFACTURED STARTER

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