What is a Lexus NX NX450h+ airbag control unit?
The Lexus NX NX450h+ airbag control unit is the central safety unit in the vehicle, which specifically activates all passive occupant restraint systems, such as airbags and seatbelt pretensioners, after a collision. It continuously monitors sensors, stores relevant crash data, and is essential for the proper functioning of all airbag modules for maximum occupant safety.
This safety-relevant module is an integral part of the Supplemental Restraint System (SRS) of your Lexus NX450h+. It receives and processes signals from various impact sensors throughout the vehicle.
Its primary task is to assess the severity of an accident and deploy the appropriate airbags and seatbelt pretensioners within milliseconds, thus ensuring the protection of the occupants in the event of a collision.
Why is the Lexus NX NX450h+ airbag control unit defective?
A Lexus NX NX450h+ airbag control unit often fails because it permanently stores crash data after an accident, necessitating reprogramming or replacement. Electrical malfunctions, internal component failures due to aging, or water damage can also render the unit inoperable and require a "Lexus NX NX450h+ airbag control unit repair."
In the event of an accident, the airbag control unit irreversibly stores crash data. This data prevents the module from being reused without a professional reset or repair.
Common causes include age-related wear and tear on electronic components or damage caused by moisture ingress. A faulty power supply or power surges can also lead to failure.
Malfunctions can manifest as persistent airbag warning lights or cause the vehicle to fail to start. A precise diagnosis is essential for a successful Lexus NX NX450h+ airbag control unit repair.
Common error codes for Lexus NX NX450h+ airbag control unit repair
Specific OBD-II B codes indicate defects in the Lexus NX NX450h+ airbag control module itself or its communication capability, requiring immediate "Lexus NX NX450h+ airbag control module repair." These codes indicate system malfunctions that could compromise safety and are critical for accurately diagnosing and correcting the problem.
- `B1000`: Meaning → Control unit communication error. Cause → Malfunction in the data connection to the airbag control unit.
- `B1617/84`: Meaning → Communication lost with front airbag sensor LH. Cause → Airbag control unit reports lost connection to the front left sensor.
- B1618/84: Meaning → Front airbag sensor LH initialization incomplete. Cause → Airbag control unit cannot initialize the front left sensor correctly.
- B1866: Meaning → Open circuit in the driver's knee airbag. Cause → The airbag control unit detects an open circuit in the driver's knee airbag circuit.
- B1926: Meaning → Open circuit (airbag control module related). Cause → A general open circuit in the airbag system circuit, often reported directly by the control module.
What part numbers are available for the Lexus NX NX450h+ airbag control unit repair?
For a precise "Lexus NX NX450h+ airbag control unit repair," the exact OEM part numbers are crucial, as only these ensure full compatibility with your vehicle. Identifying the correct number is the first step toward successfully repairing or replacing this important safety module to prevent malfunctions.
For the airbag control unit of the Lexus NX NX450h+, the following genuine OEM part numbers are confirmed directly by Lexus. These numbers guarantee compatibility with the NX vehicle series (based on VIN start 2).
- `89170-0E430`: This is the primary OEM part number listed in official Lexus parts catalogs for this specific airbag control unit.
- `8917048E60`: This number serves as an alternative OEM part number for the same module and is also officially confirmed.
There are no publicly available, separate OEM supplier numbers (e.g., from Bosch or Continental) listed specifically for this control unit. The numbers listed come directly from Lexus.