What is a BMW i8 I15 Roadster airbag control unit?
The BMW i8 i15 Roadster airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It precisely monitors all crash sensors, stores relevant accident and system data, and ensures the immediate and coordinated deployment of all airbag modules and seatbelt pretensioners in the vehicle. This is crucial for occupant safety.
This module, also known as the SRS control unit, forms the heart of the passive safety system in your BMW i8 i15 Roadster. It decides in milliseconds on the necessary protective measures after a collision.
It is responsible not only for the airbags, but also for additional systems such as automatic rollover protection and the deactivation of the high-voltage powertrain in the event of an impact.
Why is the BMW i8 I15 Roadster airbag control unit defective?
A BMW i8 I15 Roadster airbag control unit may be defective because it stores crash data after an accident, necessitating a BMW i8 I15 Roadster airbag control unit repair or replacement. Internal electronic errors, communication problems, or excessive wiring resistance can also lead to a failure that impairs system function and requires immediate workshop diagnostics.
Common causes are stored crash data after an accident, which blocks the control unit and prevents the airbags from being deployed again.
In addition, internal electronic errors, short circuits or damage caused by moisture can lead to failure.
Problems with the power supply or the battery safety contact (BST) can also affect the control unit and require a precise error diagnosis.
Common error codes for BMW i8 I15 Roadster airbag control unit repair
Specific error codes are crucial for the precise diagnosis of a defective BMW i8 I15 Roadster airbag control unit and initiate the necessary BMW i8 I15 Roadster airbag control unit repair. These codes directly indicate problems with the module itself, communication, or the power supply and must be read and corrected with special tools to restore full functionality.
- 930BE8 : High Voltage System Shutdown, Resistance Too High (REME/ACSM4I) → Indicates too high resistance in the high voltage airbag circuit, often caused by wiring harness damage or poor connections in the REME module area.
- B1000 : Control unit communication error → Indicates that the airbag control unit is not communicating properly with other vehicle systems or the diagnostic tool, which indicates internal defects or faulty connectors.
- 93B2 : BST (Battery Safety Terminal) Error → Indicates problems with the battery safety contact, which is responsible for the safe power supply to the airbag system and ensures correct function.
These specific error codes require the use of BMW-specific diagnostic tools such as ISTA to read them and then perform a successful BMW i8 I15 Roadster airbag control unit repair or reset.
Generic OBD-II scanners often cannot detect or interpret these deep control unit errors.
What part numbers are available for the BMW i8 I15 Roadster airbag control unit repair?
Several specific OEM and supplier part numbers are relevant for BMW i8 I15 Roadster airbag control unit repairs, as part compatibility is of utmost importance. The correct part number ensures that the new or repaired control unit fits seamlessly into your vehicle's complex safety system and performs all functions correctly. Verifying the part number with the chassis number is essential before any repair.
- 65 77 6 933 997 : BMW / Autoliv → Original airbag control unit, frequently documented and specific for the i8 Roadster.
- 65 77 6 934 111 : BMW → Official original or replacement airbag control unit from the BMW parts catalog.
- 8 382 217 : Bosch → OEM supplier airbag control unit, a typical Bosch reference number for airbag control units.
- A2C59514447 : Continental → OEM supplier airbag control unit, listed as standard reference for BMW airbag systems by VDO/Continental.
These validated part numbers are crucial to ensuring you receive the correct module for your BMW i8 I15 Roadster airbag control unit repair or replacement.
Before purchasing or repairing, you should always check the part number of your existing control unit against these references and ideally perform a VIN check to avoid compatibility issues.