What is a Lexus RX RX350 airbag control unit?
The Lexus RX RX350 airbag control unit is the central safety unit in the vehicle, responsible for the proper functioning of all occupant restraint systems. It continuously monitors sensors, detects impact events, and precisely deploys airbags and seatbelt pretensioners in the event of a collision to ensure maximum safety.
This module is a key component of your vehicle's Supplemental Restraint System (SRS). It ensures the proper activation of protective measures in the event of an accident.
The unit is electrically operated and has its own fuse in the vehicle's electrical system. It is continuously connected to the vehicle's system and receives important diagnostic and control data.
Why is the Lexus RX RX350 airbag control unit defective?
A Lexus RX RX350 airbag control unit can fail because it has stored hard crash data after an accident, requiring reprogramming, or due to internal electronic malfunctions such as short circuits and aging-related wear. This often leads to the airbag warning light illuminating.
After a collision, the control unit stores indelible crash data that blocks the reactivation of the airbag systems. Even after minor impacts, this can necessitate replacing or resetting the module.
Even without an accident, the module can develop internal errors that impair its functionality. These errors are detected by the device's self-diagnosis and stored as specific error codes.
A professional diagnosis is essential to determine the exact cause and perform a professional Lexus RX RX350 airbag control unit repair.
Common error codes for Lexus RX RX350 airbag control unit repair
During a Lexus RX RX350 airbag control module repair, specific error codes are reported directly by the airbag control module and indicate problems with communication or monitored circuits. These codes are crucial for accurately diagnosing the module's condition.
- **B1000** → Control unit communication error → The airbag control unit cannot communicate with other vehicle systems or does not respond.
- **B1861** → Open circuit in the driver's knee airbag → An open circuit in the circuit of the knee protection airbag on the driver's side was detected by the control unit.
- **B1926** → Open circuit in the left rear seat belt pretensioner → The airbag control unit registers an open circuit in the circuit of the left belt pretensioner in the rear seat area.
These codes are exclusively relevant for the airbag control unit and help the workshop with the Lexus RX RX350 airbag control unit repair.
Resetting or clearing these error codes requires specialized diagnostic tools. Standard OBD-II scanners cannot remove crash-related data.
What part numbers are available for the Lexus RX RX350 airbag control unit repair?
For Lexus RX RX350 airbag control unit repairs, specific Lexus OEM part numbers are essential to ensure compatibility and safety. These original manufacturer part numbers precisely match the various model years and trim levels of the Lexus RX 350.
The following OEM part numbers are 100% verified for Lexus RX350 airbag control units:
- 89170-0E031 (including 8917048341 and 8917048730 as internal references)
- 89170-0E170
- 89170-0E430
- 89170-0E200 (especially relevant for the 2019 model year)
These numbers ensure that you receive the correct airbag control unit for your vehicle model. When repairing a Lexus RX RX350 airbag control unit, always ensure the part number matches exactly.
The use of original parts or professionally repaired modules is crucial for the full functionality and safety of your vehicle. A professional workshop can assist you with the selection and carry out the installation.