What is a Lexus RX RX400h airbag control unit?
The Lexus RX RX400h 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. Designed specifically for the 2006 to 2008 hybrid RX models, it also monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules in the vehicle.
This electronic module communicates with various front, side, and window airbags, as well as seatbelt pretensioners. It continuously receives signals from a multitude of strategically positioned impact sensors throughout the vehicle.
The module controls the precise deployment of airbags and seatbelt pretensioners in the event of an accident. It is designed for use in conjunction with the Hybrid Synergy Drive and provides comprehensive occupant protection.
Why is the Lexus RX RX400h airbag control unit defective?
The Lexus RX RX400h airbag control unit often fails due to internal components such as memory or power supply failure, or communication interruptions. If the ECU malfunctions, critical B-error codes occur, necessitating a Lexus RX RX400h airbag control unit repair.
Common causes include age-related wear and tear on the electronics or voltage spikes that lead to internal errors. The system is complex and sensitive to electrical anomalies, which can lead to failure.
Corruption of the internal memory (EEPROM) can also cause the control unit to lose its functionality. This often manifests itself in specific diagnostic error codes that require detailed investigation.
Common error codes for Lexus RX RX400h airbag control unit repair
Lexus RX RX400h airbag control unit repairs often diagnose specific OBD-II B codes that indicate internal problems or communication failures within the control unit. These codes are crucial for accurately identifying and correcting the fault because they directly affect the ECU.
- B1000 → Control unit communication error → Error in the ECU connection to other systems.
- B1613 → Internal error in the airbag control unit → Malfunction within the ECU hardware or software.
- B1624 → Airbag control unit memory (EEPROM) error → Data corruption or defect in the ECU's non-volatile memory.
- B1631 → Airbag control unit power supply error → Insufficient or unstable electrical supply to the ECU.
- B1780 → Communication error between airbag ECU and gateway → Interruption of data transmission in the vehicle network.
- B1861 → Short circuit or open circuit in the knee airbag circuit (driver side) → Control unit monitored error in the knee airbag circuit.
What part numbers are available for the Lexus RX RX400h airbag control unit repair?
For Lexus RX RX400h airbag control unit repairs, only the original OEM part numbers 89170-48151 and 89170-48150 are verified. These numbers guarantee an exact fit for the Lexus RX 400h airbag control unit and are taken from official Lexus parts catalogs.
Part number 89170-48151 is listed by Lexus as a genuine part for the RX 400h airbag control unit. It has been confirmed as 100% verified by several independent sources.
Likewise, part number 89170-48150 is a matching OEM number for the airbag control unit in this model. Both numbers represent the central airbag control unit and not sensors or other modules.
Supplier numbers from manufacturers such as Bosch or Continental are not directly available for this specific Lexus control unit, as Lexus typically uses its own OEM numbers.