What is a Lexus NX NX300h airbag control unit?
The Lexus NX NX300h airbag control unit is the central safety unit in the vehicle, acting as the "brain" of the Supplemental Restraint System (SRS). It continuously monitors all airbag sensors, processes crash data in milliseconds in the event of an accident, and precisely activates the airbags and seatbelt pretensioners for maximum occupant protection.
This essential module is responsible for controlling all passive safety systems. It ensures that airbags and seatbelt pretensioners deploy at the right time and with the correct intensity.
The device also performs continuous self-diagnostics to ensure operational readiness. Any errors are immediately signaled via the airbag warning light in the instrument cluster.
Why is the Lexus NX NX300h airbag control unit defective?
A Lexus NX NX300h airbag control unit can fail due to internal electronic errors, a short circuit in the system, or an overvoltage. It is often also damaged after an accident, as crash data is permanently stored, making a Lexus NX NX300h airbag control unit repair or replacement unavoidable.
Common causes include internal software errors or damaged components in the control unit itself. Moisture ingress or age-related wear can also lead to failure.
Malfunctions often manifest themselves with a permanently illuminated airbag warning light. This requires immediate diagnosis to restore driving ability and safety.
After an accident, the module irreversibly stores crash data, even if it still appears to be functional. In this case, a reset or a specific Lexus NX NX300h airbag control unit repair is necessary.
Common error codes for Lexus NX NX300h airbag control unit repair
During Lexus NX NX300h airbag control module repairs, specific error codes occur that indicate internal defects, communication problems, or circuit problems with the airbag control module. These B-codes indicate a need for repair or replacement of the module, not the sensors.
- B1000 → Control unit communication error → Indicates problems with the airbag ECU or wiring.
- B1650 → Internal error in the airbag control unit → Signals a problem in the ECU software or hardware.
- B1787 → Airbag control module calibration error → Indicates a faulty system calibration in the module.
- B1861 → Airbag circuit malfunction → Occurs when there is a problem in the airbag control circuit, e.g. the knee airbag connector.
- B1907 → Airbag circuit short to ground → Indicates an unwanted ground contact in the control circuit.
- B1908 → Short circuit to positive (12V) in the airbag circuit → Signals an inadmissible voltage in the airbag control circuit.
- B1921 → Airbag Circuit Open → Describes an open circuit within the airbag control circuit of the module.
What part numbers are available for the Lexus NX NX300h airbag control unit repair?
For the Lexus NX NX300h airbag control unit repair, the only verified original OEM part number is 8917078010, also known as 89170-78010. This is listed directly by Lexus and is the primary identification for the airbag control unit for this model, with no other compatible OEM alternatives available.
The part number 8917078010 identifies the specific airbag control unit for the Lexus NX300h of model years 2017 and 2019 and is listed in official Lexus spare parts catalogs.
Extensive research confirms that no other OEM part numbers exist for the airbag control unit specifically for the Lexus NX300h. This significantly simplifies the parts search.
Even suppliers such as Bosch or Continental could not find explicitly confirmed, compatible spare part numbers for this specific airbag control unit. Therefore, the OEM number 8917078010 is crucial.