What is a Lexus GX 550 airbag control unit?
The Lexus GX 550 airbag control unit is the heart of the safety system. It constantly monitors impact sensors and passengers. In the event of an accident, it processes data in milliseconds to coordinate the activation of all airbags and seatbelt pretensioners. This is critical to your safety and requires precise repair if defective.
This complex electronic control unit was specifically developed for the 2024 and 2025 model year Lexus GX 550. It is compatible with all variants, including Premium, Overtrail, and Luxury.
The control unit is integrated into a comprehensive airbag system. It controls front, side, knee, and curtain airbags, as well as seatbelt pretensioners and crash sensors for optimal restraint in the event of an impact.
Why is the Lexus GX 550 airbag control unit defective?
The Lexus GX 550 airbag control unit may be defective because it stores crash data after an accident, requiring a reset or replacement. Internal malfunctions, such as water damage or power surges, can also lead to failure, making repair or replacement unavoidable.
After an airbag deployment, the control module is usually disabled. According to Lexus service bulletins, it must then be replaced or professionally repaired to restore full functionality.
A defect may be indicated by the airbag warning light illuminating in the dashboard. Without a functioning control unit, the airbags will not deploy in the event of an accident, which poses a significant safety risk.
Common error codes for Lexus GX 550 airbag control unit repair
Lexus GX 550 airbag control module repairs often involve specific error codes that directly indicate problems with the module itself. These codes, such as B1000, B1861, and B1866, indicate communication errors or problems with the knee airbag circuits and require a precise diagnosis.
- B1000 → Control unit communication error → Error in the internal communication of the airbag ECU or with other systems.
- B1861 → Open circuit knee airbag driver side → Interruption of the electrical connection to the knee airbag on the driver side.
- B1866 → Open circuit knee airbag on the passenger side → Interruption of the electrical connection to the knee airbag on the passenger side.
What part numbers are available for the Lexus GX 550 airbag control unit repair?
For Lexus GX 550 airbag control unit repairs, the exact OEM part numbers 89170-60080 and 89170-60090 are crucial. These numbers are verified in official Lexus parts catalogs and are specific to the 2024 model's airbag control unit, ensuring compatibility and safety.
The numbers 89170-60080 and 89170-60090 are the primary OEM part numbers from Lexus itself. They are exclusively assigned to the Airbag Control Module and not to other airbag components such as sensors.
Due to strict safety regulations, airbag control units must always be replaced with the exact OEM part number. A professional workshop will carefully check the serial numbers and compatibility with your vehicle model.