What is a Lexus RX RX500h airbag control unit?
The Lexus RX RX500h airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules in the vehicle to ensure maximum safety. It is critical to the Supplemental Restraint System (SRS).
This module is the heart of the passive safety system of your Lexus RX500h.
It processes real-time data from impact and acceleration sensors and coordinates the precise and time-critical deployment of the airbags and seat belt tensioners.
Why is the Lexus RX RX500h airbag control unit defective?
A Lexus RX RX500h airbag control unit is often defective because it permanently stores crash data after an accident, preventing a system reset. Internal hardware errors or communication problems can also lead to a failure, causing the SRS system to no longer function properly and necessitating repair.
After a vehicle accident, the airbag control unit stores special crash data.
This data can cause the system to become blocked and error messages cannot be cleared, requiring a Lexus RX RX500h airbag control unit repair.
Another reason for a defect is internal electronic failures.
Components in the control unit can be damaged due to age or overvoltage, leading to malfunctions or complete failure.
Communication errors with other vehicle systems can also make the airbag control unit appear defective.
Such problems are often indicated by an illuminated airbag warning light, which requires professional diagnostics at the workshop to repair the airbag control unit.
Common error codes for Lexus RX RX500h airbag control unit repair
During Lexus RX RX500h airbag control unit repairs, specific error codes will occur that directly indicate problems with the control unit. These codes are crucial for diagnosis and indicate whether the module is experiencing communication difficulties or has permanently stored crash data.
- **B1000** → Control unit communication error → Cause: Problem in the data connection or internal failure of the airbag control unit.
- **B1100** → Control unit error / crash data stored → Cause: The airbag control unit has detected an accident and permanently stored crash data, which blocks a system reset.
These error codes are crucial to identifying the need for a Lexus RX RX500h airbag control unit repair.
They focus directly on the function of the control unit, not on individual airbag sensors or other components.
An accurate diagnosis is the first step to repairing the airbag control unit.
What part numbers are available for the Lexus RX RX500h airbag control unit repair?
For Lexus RX RX500h airbag control unit repairs, there are several specific OEM part numbers that ensure the replacement part's compatibility with your vehicle. These numbers are crucial for identifying the correct control unit and ensuring a trouble-free replacement or repair.
The following genuine part numbers are verified for the Lexus RX RX500h airbag control unit.
These were obtained directly from official Lexus parts catalogs and verified sources; finding the exact number is essential for a successful repair.
The primary OEM part number is **891700E430**.
An alternative spelling that is also valid is **89170-0E430**; both are directly mapped to the Lexus Parts OEM catalog.
Another confirmed OEM part number for this model is **8917048E60**.
This number is also listed in the official Lexus Parts OEM catalog for the RX500h airbag control unit and is relevant if you want to have the airbag control unit repaired.
The number **8917048080** was also identified as a compatible Denso/Lexus OEM module used in similar Lexus RX models.
This may be a replacement part option for your Lexus RX RX500h airbag control unit repair.
It is important to check the exact part number of your defective control unit.
This is the only way to ensure that the correct replacement part is used for the Lexus RX RX500h airbag control unit repair to restore the full functionality of the SRS system.