What is a Porsche 911 Carrera 4S 991 airbag control unit?
The Porsche 911 Carrera 4S 991 airbag control unit is the central safety unit that activates and monitors all occupant restraint systems in the event of an accident. It collects sensor data, stores important crash information, and ensures the correct deployment of the airbags and seatbelt pretensioners for maximum occupant safety.
This safety-critical electronic module is responsible for controlling and monitoring the entire airbag system in the vehicle.
The control unit's software is programmed specifically for the vehicle and model, meaning that all vehicle-specific data is retained after a **Porsche 911 Carrera 4S 991 airbag control unit repair**.
It is networked with other vehicle systems via the CAN bus to exchange status information and trigger commands.
The control unit is installed in the interior, typically below the center console in the tunnel area, and requires specialist knowledge.
Why is the Porsche 911 Carrera 4S 991 airbag control unit defective?
The Porsche 911 Carrera 4S 991 airbag control unit often fails because it stores crash data after an accident, signaling a malfunction that cannot be deleted independently. Internal electronic errors or communication problems in the vehicle's network can also lead to failure, necessitating a professional Porsche 911 Carrera 4S 991 airbag control unit repair.
Crash data stored after an accident prevents the error memory from being erased and the airbag warning light from going out.
The control unit has a self-diagnosis function that generates corresponding error codes in the event of system malfunctions or stored crash data.
An internal failure of the module itself, whether due to hardware or software problems, can also be the cause of a defect.
A comprehensive diagnosis and repair for a broken control unit usually takes about 3-5 business days.
Common error codes for Porsche 911 Carrera 4S 991 airbag control unit repair
Common error codes during Porsche 911 Carrera 4S 991 airbag control unit repair indicate specific problems within the airbag system and are crucial for a precise diagnosis. These codes often signal internal control unit errors, communication problems, or short circuits within the deployment circuits that can only be repaired by a specialist workshop.
- C11005 → Airbag Triggering Unit Faulty → Faulty triggering unit in the control unit.
- B1000 → Control unit communication error → Problems with data transmission of the airbag ECU.
- 004E03 → Ignition circuit - Short circuit between circuits → Electrical defect in the airbag ignition circuit.
- 000501 → Passenger airbag short circuit to ground → Short circuit to ground in the passenger airbag circuit.
- 20004 (F-Code) → Internal control unit error → Unknown, but clearly internal control unit failure.
What part numbers are available for the Porsche 911 Carrera 4S 991 airbag control unit repair?
For the Porsche 911 Carrera 4S 991 airbag control unit repair, several verified OEM part numbers are relevant, ensuring exact compatibility with the vehicle model. The most frequently used and frequently verified part number is 99161820104, but other numbers such as 99161820108 or 99180306101 are also documented for the 991 series.
Selecting the correct part number is crucial for a successful repair and the full functionality of the airbag system.
These numbers are only suitable for airbag control units, not for sensors or other modules.
Checking the vehicle's VIN is always advisable to ensure exact compatibility, especially when sourcing a replacement part or performing a professional **Porsche 911 Carrera 4S 991 airbag control unit repair**.
Here are the proven exact OEM part numbers for original airbag control units for the Porsche 911 Carrera 4S 991 series:
- 99161820104: The most frequently used and frequently tested OEM part number.
- 99161820108: Another original OEM part number from Porsche.
- 99161820103: Also a verified OEM part number for this model.
- 99161820102: An older but compatible OEM reference.
- 99180306101: OEM part number for 991 series instrument panel air bag control units.
- 99180306100: Another OEM number, suitable for the 991 series, also for convertible variants.