What is a Nissan Micra K12 airbag control unit?
The Nissan Micra K12 airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It precisely monitors sensors, stores relevant crash data, and ensures the proper functioning of all airbag modules in the vehicle, which is crucial for safety.
This control unit, often supplied by Bosch, is the heart of your Nissan Micra III (K12)'s passive safety system. It processes signals from acceleration and impact sensors.
Its primary function is to quickly and reliably deploy the airbags and seatbelt pretensioners in the event of an impact. After an accident, it stores important crash data that is essential for accident analysis and system diagnostics.
Why is the Nissan Micra K12 airbag control unit defective?
A Nissan Micra K12 airbag control unit often fails because crash data is permanently stored after an accident, resulting in the system being locked. Internal electronic errors, a short circuit, or communication problems can also lead to failure, making a professional Nissan Micra K12 airbag control unit repair unavoidable.
This storage of crash data blocks the control unit and causes the airbag warning light to remain permanently illuminated. Deleting the data is only possible with specialized software and expert knowledge.
In addition, age-related wear and tear, moisture, or voltage fluctuations can lead to internal damage. In such cases, a diagnosis is necessary to accurately identify the problem and repair the airbag control unit.
Common error codes for Nissan Micra K12 airbag control unit repair
Typical error codes indicating a faulty Nissan Micra K12 airbag control unit include specific B-codes related directly to the control unit. These typically cause the airbag warning light to illuminate and require professional diagnosis and repair.
- B1049 → Control unit blocked / communication error → Typical when the system is blocked after an accident or when there are internal communication problems.
- B1059 → Control unit defective / crash data stored → Indicates that crash data is stored in the memory and the control unit is locked.
- B1139 → Control unit defective → A general error code indicating internal damage or failure of the unit.
What part numbers are available for the Nissan Micra K12 airbag control unit repair?
For Nissan Micra K12 airbag control unit repairs, various OEM and Bosch part numbers are relevant to ensure compatibility with your vehicle model. Correct identification of the part number is crucial for a successful repair or replacement.
Common Nissan OEM part numbers include 28556BC400, 98820BC500, 98820AX502, and 98820AX503. These are specifically designed for the Micra K12 with engine types such as the CR12DE.
Bosch also supplies important original control units with the numbers 0285001852 and 0285001853. These Bosch numbers are often linked to Nissan OEM numbers and are compatible with the vehicle. To repair or replace your defective unit, check the exact part number on your old part.