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 Category ignitions and electrical Parts
301 parts available
Shop aftermarket parts for the Audi A4. Verified fitment, free shipping, 30-day returns.

Bosch
RE ALTERNATOR
Bosch
RE ALTERNATOR

Hella
ALTERNATOR

Bosch
RE ALTERNATOR

Hella
ALTERNATOR 12V 120A

Bosch
REMAN ALTERNATOR
Bosch
ASSEMBLY HOSE
Bosch
RE ALTERNATOR

Bosch
RE ALTERNATOR
Bosch
CONNECTED R-1234YF ACS RECOVER REC

NGK
NGK MOD Ignition Coil Set 4pk Stock #49475

Hella
ACCELERATOR PEDAL SENSOR
Hella
ALTERNATOR 14V 150A
Bosch
RE ALTERNATOR
RaceChip
PERFORMANCE TUNING CHIP - RS
RaceChip
PERFORMANCE TUNING CHIP - GTS + APP

RaceChip
PERFORMANCE TUNING CHIP - GTS BLACK

Bosch
DRIVE END SHIELD
NGK
ABS WHEEL SPEED SENSOR

Odyssey
Odyssey Battery Auto/Truck/Heavy Duty & Commercial Performance AGM Battery (49-950)

Odyssey
Odyssey Battery Auto/Truck/Heavy Duty & Commercial Performance AGM Battery (48-720)

Odyssey
Odyssey Battery Auto/Truck/Heavy Duty & Commercial Performance AGM Battery (47-650)

NGK
NGK Audi A4 / A8 / S6 / RS6 MOD Ignition Coils - Set of 4

APR Tuning
Ignition Coils PQ35 Style Grey APR

APR Tuning
Ignition Coils PQ35 Style Red APR

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

APR Tuning
Catch Can Universal (EA113 PCV Block Off Plate and Fittings Only) APR

ACCEL
Ignition Coils 2014-2019 Vw/Audi 1.8/2.0L Engines, 4-Pack, Black Fits 2014-2019 Vw Beetle, Golf, Jetta, Passa, Arteon 1.8/2.0L Turbo Engines And Audi A3, A3 Quattro, S3, Tt Quattro, Tt Rs Quattro, 2.0L Turbo Engines, 4-Pack ACCEL

Mishimoto
Mishimoto 15-21 VW GTI 2.0L Ignition Coil - 4-Pack

Pedal Commander
Pedal Commander Audi/Bentley/VW Throttle Controller

Pedal Commander
Pedal Commander Hyundai/Kia Throttle Controller

Diode Dynamics
Diode Dynamics 36mm HP6 LED - Red (Single)

Mishimoto
Mishimoto 06-08 VW/Audi Five Cylinder Ignition Coil Set

Pedal Commander
Pedal Commander Audi/Lamborghini/Porsche/Skoda/VW Throttle Controller

Putco
Putco High Intensity Discharge Bulb - OEM/4300K - D1S

Bosch
Bosch 14V Pencil Type 249 Ignition Coil (OE 06E905115E/06E905115F/06E905115G/95860210200)

Putco
Putco Plug and Play Load Resistor System - Fits 194/921

Putco
Putco Plug and Play Load Resistor System - Fits 1157

Bosch
Bosch Crankshaft Position Sensor (OE 06A906433C)

Bosch
Bosch 14V Pencil Type 247 Ignition Coil (OE 06H905115A/06F905115F/07K905715C/07K905715F/07K905715G)

AntiGravity Batteries
Antigravity H6/Group 48 Lithium Car Battery w/Re-Start

Pedal Commander
Pedal Commander Audi/Lamborghini/Porsche/Skoda/VW Throttle Controller

Hella
Hella Bulb 7225 12V 21/4W BAZ15d S8

Hella
Hella Optilux H9 12V/100W XB Xenon White Bulb (pair)

Hella
Hella Bulb H1 12V 55W P145S T25 (2)

NGK
NGK 1998-94 Audi Cabriolet DIS Ignition Coil

NGK
NGK Volkswagen EuroVan 1997 Direct Fit Oxygen Sensor

NGK
NGK Double Platinum Spark Plug Box of 4 (PFR7S8EG)

NGK
NGK Audi 90 1995-1993 Spark Plug Wire Set

NGK
NGK Audi A4 2001-1997 Spark Plug Wire Set

NGK
NGK 2005-98 VW Passat DIS Ignition Coil

NGK
NGK 2009-08 VW Touareg COP Pencil Type Ignition Coil

NGK
NGK 2015-07 VW Touareg COP Pencil Type Ignition Coil

NGK
NGK Iridium Spark Plugs Box of 4 (BKR7EIX)

NGK
NGK Ruthenium HX Spark Plug Box of 4 (FR7BHX-S)

NGK
NGK Iridium Long Life Spark Plugs Box of 4 (IFR6D10)

NGK
NGK Laser Platinum Spark Plug Box of 4 (PFR6X-11)

NGK
NGK 2001-00 VW Passat COP Ignition Coil

aFe
aFe Power Sprint Booster Power Converter 11-18 Audi A7/S7

aFe
aFe 17-20 Audi A3 / 15-20 Audi A4 Scorcher High-Performance Ignition Coil
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