Airbag control unit with part number 5WY67123

What is the function of the airbag control unit 5WY67123?

The airbag control unit with part number 5WY67123 is the central control module for the passive safety system (SRS) in vehicles such as the first-generation Chevrolet Lacetti. It processes data from crash sensors and is responsible for precisely deploying airbags and seatbelt pretensioners in the event of a collision.

As the brain of the restraint system, it continuously monitors all connected components—from impact sensors and seatbelt pretensioners to individual airbag modules. In the event of a collision, the control unit determines within milliseconds which safety devices need to be activated.

This unit is also known under the alternative numbers 5WY67123-95160 and the OEM part number 94 833 085. It is designed to work seamlessly with safety systems from manufacturers such as Bosch, Delphi, Continental, Denso, or TRW.

Why does the control unit 5WY67123 fail?

The most common cause of failure for the 5WY67123 control unit is the storage of crash data after an accident, which locks the device. Other reasons include electronic component defects, overvoltage, water damage, or issues with wiring and connectors.

Following a traffic accident, the unit permanently stores collision data. This lockout is a safety feature that prevents further use without professional inspection and repair.

Hardware defects are also a frequent cause. These include broken wires, loose connectors, or damage caused by moisture and overvoltage. Such malfunctions lead to internal errors on the circuit board.

In the fault memory, non‑erasable error codes such as 65535 (control unit defective), 93F9 (internal error), B1000, or general CAN‑bus errors are often recorded, indicating an irreparable condition without specialized repair.

How can you tell if the airbag control unit 5WY67123 is defective?

The clearest symptom is a constantly illuminated or flashing airbag warning light (SRS light) in the instrument cluster. Often, the control unit cannot be read with a diagnostic tool because communication has been lost. In this state, the airbags are deactivated.

The SRS warning light alerts the driver to a critical fault in the safety system. Ignoring this signal means there will be no protective effect from airbags or seatbelt pretensioners in the event of a crash.

Another clear indication is when the workshop cannot access the airbag control unit. Attempts to read or clear the fault memory fail because the unit no longer responds to requests via the diagnostic interface.

In which vehicles is the control unit 5WY67123 installed?

The airbag control unit with part number 5WY67123 is specifically found in models from Chevrolet and Daewoo. It is primarily installed in the first-generation Chevrolet Lacetti (2004–2010) as well as in the technically related Daewoo Gentra T250.

At Airbag24, we repair the control unit with part number 5WY67123 for the following models:

Chevrolet: Lacetti (1st generation, model years 2004–2010)

Daewoo: Gentra (model T250)

Please verify that your unit’s part number matches 5WY67123, 5WY67123-95160, or 94 833 085 to ensure compatibility.

How is the control unit 5WY67123 professionally repaired?

Professional repair of the 5WY67123 at Airbag24 includes precise diagnostics, secure deletion of stored crash data, and replacement of defective electronic components. A final functional test guarantees full operability, backed by 2 years’ statutory liability for defects.

After sending the removed control unit to Airbag24, a systematic fault analysis is performed first. Components on the circuit board, such as chips and capacitors, are thoroughly inspected.

The core of the repair involves erasing crash data stored after an accident and unlocking the unit. Defective parts are replaced with new, high-quality components to restore original functionality.

Subsequently, the control unit undergoes a comprehensive functional test to ensure it communicates flawlessly with the vehicle again and controls all safety functions. The repaired control unit comes back with all vehicle data and is ready for use immediately after reinstallation — no coding or programming is necessary.