What is a Mazda CX-90 KH airbag control unit?
The Mazda CX-90 KH airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors sensors, stores relevant crash data, and ensures the proper functioning of all airbag modules and seatbelt pretensioners in the vehicle to ensure maximum safety.
This electronic control unit is responsible for the precise deployment of the airbags based on real-time sensor information. It coordinates the response of various passive safety systems in the vehicle.
Supported safety features include front, side, and head airbags, as well as knee airbags, which are activated depending on the type and severity of the accident.
Why is the Mazda CX-90 KH airbag control unit defective?
A Mazda CX-90 KH airbag control unit often fails because it permanently stores crash data after an accident, internal components are damaged by overvoltage, or age-related material fatigue occurs. Such defects usually lead to an illuminated airbag warning light and a necessary repair.
After an accident, the control unit often locks up because it stores crash data and needs to be reset for reuse. Electrical problems such as short circuits or overvoltage in the vehicle's electrical system can also damage internal components.
A malfunction may be indicated by a permanently illuminated airbag warning light or by the system not deploying correctly in an emergency. A professional diagnosis is essential for Mazda CX-90 KH airbag control unit repair.
Common error codes for Mazda CX-90 KH airbag control unit repair
During a Mazda CX-90 KH airbag control unit repair, specific error codes such as B1000, B1994, and B1998 are common. These codes directly indicate problems within the airbag control unit or its monitoring functions and require targeted troubleshooting.
- B1000 → Control unit communication error → Cause: Internal fault in the control unit or problems with the data connection.
- B1994 → Driver airbag module circuit high resistance → Cause: The control module detects a faulty resistance in the driver airbag circuit, often caused by internal control module problems or wiring.
- B1998 → Passenger airbag module circuit high resistance → Cause: The control unit measures too high resistance in the passenger airbag circuit, which indicates an internal fault in the control unit or the wiring.
What part numbers are available for the Mazda CX-90 KH airbag control unit repair?
For Mazda CX-90 KH airbag control unit repairs, only the original OEM part numbers KMV657K30B and KMV657K30A are valid and must be used. These part numbers are 100% verified and ensure that they are the exact original control unit for your vehicle, enabling a professional repair.
The following OEM numbers are relevant for the airbag control unit (SAS Unit) of the Mazda CX-90 KH:
- KMV657K30B (OEM Original Mazda Airbag Control Unit)
- KMV657K30A (OEM Original Mazda Airbag Control Unit)
No alternative or replacement part numbers from suppliers such as Bosch or Continental could be confirmed with certainty for this specific model and assembly. Other numbers belong to brackets or sensors, not to the control unit itself, which is important for the Mazda CX-90 KH airbag control unit repair.