What is a Porsche 911 Carrera 4S 996 airbag control unit?
The Porsche 911 Carrera 4S 996 airbag control unit is the central safety unit in the vehicle, recording impact information and precisely activating the airbags and seatbelt pretensioners in the event of an accident. It stores important crash data and must ensure the safety of the vehicle's occupants.
This control unit forms the heart of the passive safety system of your Porsche 911 Carrera 4S (Type 996).
It processes the signals from numerous sensors installed in the vehicle in order to react quickly in an emergency and achieve maximum protection.
Its main function is to monitor the vehicle's condition and to ensure controlled activation of the restraint systems, making proper operation crucial for the safety of all occupants.
Why is the Porsche 911 Carrera 4S 996 airbag control unit defective?
A Porsche 911 Carrera 4S 996 airbag control unit may be defective because it permanently stores crash data after an accident, has internal memory errors, or there is an internal malfunction that activates an airbag warning light and makes a Porsche 911 Carrera 4S 996 airbag control unit repair necessary.
Common causes of a defect are stored crash data after an accident.
This data blocks the system so that it no longer functions without a professional repair or a reset in a specialized workshop.
Internal electronic errors or hardware defects can also lead to failure.
In such cases, the airbag warning light will illuminate continuously, signaling a necessary replacement or repair.
Communication errors with other control units in the vehicle are also a possible cause.
This impairs the system's ability to diagnose and respond correctly.
Common error codes for Porsche 911 Carrera 4S 996 airbag control unit repair
During the Porsche 911 Carrera 4S 996 airbag control unit repair, specific error codes occur that directly indicate problems with the airbag ECU, including internal control unit errors, communication problems, and non-erasable crash data that require targeted diagnosis.
Here are the most common error codes that a Porsche 911 Carrera 4S 996 airbag control unit repair may display:
- 28 → Control unit internal error → Internal defect of the airbag ECU.
- 29 → Control unit communication error → Malfunction in the data transmission of the airbag control unit.
- 109 → Control unit memory error → Problem with the internal memory of the control unit.
- 140 → Control unit internal malfunction → General internal fault of the airbag control unit.
- B1000 → Control unit communication error → General communication error of the airbag ECU.
- “Crash data saved” → Data blocked after an accident → Requires deletion of crash data or repair.
- “Control unit defective” → Hardware defect of the airbag ECU → Internal control unit error, often irreparable damage.
What part numbers are available for the Porsche 911 Carrera 4S 996 airbag control unit repair?
For the Porsche 911 Carrera 4S 996 airbag control unit repair, several verified OEM part numbers are relevant, ensuring compatibility with your vehicle and facilitating accurate replacement parts procurement to restore the full functionality of the safety system.
Accurate identification of the part number is crucial for a successful repair or replacement.
All following numbers are original OEM part numbers that specifically fit the Porsche 911 Carrera 4S (Type 996).
Make sure to use exactly one of these numbers to avoid incompatibilities and ensure security.
This is especially important if you want to use a used control unit.
Here are the 100% verified original OEM part numbers for the airbag control unit of the Porsche 911 Carrera 4S (model 996):
- 99661821902
- 99661821901
- 99661821900
- 99661821702
- 99680308902