Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Audi S4 Standard TransFACTORY OEM SERVICE PROCEDURE
Electrical Component Locator: Miscellaneous
MISCELLANEOUS LOCATION
| Component | Location |
|---|---|
| Air Bag Igniter & Igniter 2 (Driver) (6) | In steering wheel. See Figure. |
| Air Bag Igniter 1 & 2 (Front Passenger) (1) | Behind right side of dash. See Figure. |
| Air Bag Spiral Return/Slip Ring (13) | In steering column. See Figure. |
| Antenna Amplifier (2) | Right rear of roof. See Figure. |
| Antenna Amplifier 2 (4) | Right rear of roof. See Figure. |
| Antenna Amplifier 3 (Sedan) (9) | Left side of trunk. See Figure. |
| Antenna Amplifier 3 & 4 (Avant) (8) | Left side of cargo area. See Figure. |
| Antenna (Central Locking & Anti-Theft Alarm System) | In left "C" pillar. |
| Antenna (Left Access/Start Authorization) | In left "B" pillar. |
| Antenna (Luggage Compartment Access/Start Authorization) | Left front of luggage compartment. |
| Antenna (Radio/Telephone & Navigation System) (Avant) (2) | Center rear of roof. See Figure. |
| Antenna (Radio/Telephone & Navigation System) (Sedan) (5) | Center rear of roof. See Figure. |
| Antenna 1 (Interior Access/Start Authorization) | Under front of center console. |
| Battery Interrupt Igniter (8) | Near battery. See Figure. |
| Battery Jump Start Terminal (B) | Middle of engine compartment plenum chamber. See Figure. |
| Data Bus On Board Diagnostic Interface | Behind center of dash. |
| Diagnostic Connector (DLC) (4) | Under left side of dash. See Figure. |
| Ignition Coils W/Power Output Stage No. 1, No. 2 & No. 3 (3) | Above respective bank 1 cylinders. See Figure. |
| Ignition Coils W/Power Output Stage No. 4, No. 5 & No. 6 (18) | Above respective bank 2 cylinders. See Figure. |
| Ignition Coils 1, 2, 3 & 4 W/Power Output Stage (2.0L) (24) | Above respective cylinders. See Figure. |
| Microphone Unit (Avant) (6) | In front roof module. See Figure. |
| Microphone Unit (Sedan) (4) | In front roof module. See Figure. |
| Rear Side Air Bag Igniter (Left) (9) | Left "C" pillar. See Figure. |
| Rear Side Air Bag Igniter (Right) (7) | Right "C" pillar. See Figure. |
| Resetting Ring (12) | Top of steering column. See Figure. |
| Satellite Radio (4) | Left rear of trunk. See Figure. |
| Side Air Bag Igniter (Driver) (11) | Outer side of driver's seat back. See Figure. |
| Side Air Bag Igniter (Front Passenger) (4) | Outer side of front passenger's seat back. See Figure. |
| Side Curtain Air Bag Igniter (Driver) (10) | In left roof rail. See Figure. |
| Side Curtain Air Bag Igniter (Front Passenger) (5) | In right roof rail. See Figure. |
| Telephone Amplifier (2) | Right side of trunk. See Figure. |
| Telephone Transceiver | Under front passenger's seat. |
| Terminal 30 Wire Junction (A) | Middle of engine compartment plenum chamber. See Figure. |
| TV Tuner | Left side of trunk. |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.