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.
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HOMESERVICE MANUALSAUDI2012A4 SEDAN (8K2) L4-2.0L TURBO (CAEB)REPAIR AND DIAGNOSISSTARTING AND CHARGINGSTARTING SYSTEMKEYLESS STARTING SYSTEMLOCATIONSKEYLESS ACCESS SYSTEM ASSEMBLY OVERVIEW
2012 Audi A4 Sedan (8K2) L4-2.0L Turbo (CAEB)
Keyless Access System Assembly Overview
2012 Audi A4 Sedan (8K2) L4-2.0L Turbo (CAEB)SECTION Keyless Access System Assembly Overview
Access/Start Authorization System
Keyless Access System Assembly Overview
1 Access/Start Authorization Button -E408-
• Component location: In installation frame for Multimedia Control Head -E380-
2 Electronic Steering Column Lock Control Module -J764-
• Component location: On steering column => [ Electronic Steering Column Lock Control Module ] See Image Below.
3 Passenger's Side Outside Door Handle
• With the Right Front Outside Door Handle Touch Sensor -G606-
4 Rear Passenger Side Exterior Door Handle
• With the Right Rear Outside Door Handle Touch Sensor -G418-
5 Comfort System Central Control Module -J393-
• Component location: Behind right luggage compartment side trim
6 Luggage Compartment Access/Start Authorization Antenna -R137-
• Component location: An left luggage compartment rear lid end panel => [ Luggage Compartment Access/Start Authorization Antenna ] See Image Below.
7 Central Locking and Anti-Theft Alarm System Antenna -R47-
• Integrated in the rear window
• Access/Start Authorization System Assembly Overview location => [ (Item 3) ] Access/Start Authorization System Assembly Overview
8 Rear Driver Side Exterior Door Handle
• With the Left Rear Outside Door Handle Touch Sensor -G417-
9 Left Access/Start Authorization Antenna -R200-
• Component location: On left rear door => [ Left Access/Start Authorization Antenna ] See Image Below.
10 Driver's Side Outside Door Handle
• With the Left Front Outside Door Handle Touch Sensor -G605-
11 Interior Access/Start Authorization Antenna 1 -R138-
• Component location: Beneath front center console => [ Interior Access/Start Authorization Antenna ] See Image Below.
Interior Access/Start Authorization
Antenna
1 - Interior Access/Start Authorization Antenna 1 -R138-
1 - Left Access/Start Authorization Antenna -R200-
Luggage Compartment Access/Start
Authorization Antenna
1 - Luggage Compartment Access/Start Authorization Antenna -R137-
Electronic Steering Column Lock
Control Module
• Electronic Steering Column Lock Control Module -J764-
• Mounted on the steering column
Left Access/Start Authorization
Antenna
2 - Left Access/Start Authorization Antenna -R200-
RENDER: 1.0x
NO RELATED
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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.