What is a Porsche 911 Carrera 4 991 airbag control unit?
The Porsche 911 Carrera 4 991 airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It continuously monitors the sensors, stores relevant crash data, and ensures the proper, life-saving function of all airbag modules and seatbelt pretensioners in the vehicle.
This essential module is responsible for detecting collisions and controlling the precise deployment of airbags. It processes signals from acceleration and pressure sensors throughout the vehicle.
The control unit communicates with other vehicle systems via the CAN bus and is robustly designed for use in the interior. Its compact design allows for integration under the center console of the Porsche 991.
Why is the Porsche 911 Carrera 4 991 airbag control unit defective?
A Porsche 911 Carrera 4 991 airbag control unit is often defective because it stores crash data after an accident, forcing the system to deactivate. Internal malfunctions, firmware errors, or power supply issues can also lead to failure, making an airbag control unit repair unavoidable.
Typical causes of failure include the storage of crash data after a collision, which prevents the error log from being erased. Internal module errors or communication problems can also render the control unit unusable.
Sometimes there's a short circuit in the ignition circuits, which is registered directly in the control unit. Such defects often lead to the activation of the airbag warning light in the instrument cluster, and the control unit is then defective.
Common error codes for Porsche 911 Carrera 4 991 airbag control unit repair
When repairing the Porsche 911 Carrera 4 991 airbag control unit, specific error codes occur that point directly to the control unit itself, rather than to sensors or other components. These codes require precise diagnosis to resolve the safety system failure.
- B1000 → Control unit communication error → Signal disturbance or internal defect of the airbag ECU
- 004E03 → Ignition circuit - Short circuit between two wires → Electrical defect within the control unit or its wiring
- 000501 → Short circuit to ground in the passenger airbag circuit → Short circuit to ground in the specific airbag ignition circuit of the control unit
- "Crash data saved" → Internal storage of an accident event → System blocks further functioning and deletes the error memory
What part numbers are available for the Porsche 911 Carrera 4 991 airbag control unit repair?
For the Porsche 911 Carrera 4 991 airbag control unit repair, several verified OEM part numbers are relevant, ensuring exact compatibility with the 991 series. These original Porsche numbers are crucial for a safe and professional repair of the airbag system.
- 99161820110 → Porsche Original OEM (main reference for repairs)
- 99161820104 → Porsche Original OEM (variant, compatible with 991 Carrera)
- 99161820108 → Porsche Original OEM (variant for 991 series)
- 99161820103 → Porsche Original OEM (variant for 991 series)
- 99161820102 → Porsche Original OEM (variant for 991 series)
- 99180306101 → Porsche Original OEM (Instrument Panel Airbag Control Unit)
- 99180306100 → Porsche Original OEM (alternative for instrument panel airbag control unit)
These OEM part numbers have been validated from multiple independent, trusted sources. They cover various trim and model year variants within the Porsche 991 series.