Lexus NX AZ10 airbag control unit repair

What is a Lexus NX AZ10 airbag control unit?

The Lexus NX AZ10 airbag control unit is the central safety unit for the occupant restraint systems. It continuously monitors all airbag and seatbelt pretensioner sensors, detects collisions, and precisely deploys the appropriate airbags and seatbelt pretensioners in an emergency to ensure maximum occupant safety.

This module, also known as the SRS Control Unit, is crucial for the passive safety of the Lexus NX AZ10. It collects data from various crash sensors, processes it, and stores important information after an accident.

Proper functioning is essential, as malfunctions can activate the airbag warning light and prevent the system from deploying in an emergency. Therefore, expert knowledge is required for Lexus NX AZ10 airbag control unit repair.

Why is the Lexus NX AZ10 airbag control unit defective?

A Lexus NX AZ10 airbag control unit often fails because it stores crash data after an accident and locks up, requiring reprogramming or replacement. Electrical surges, water damage, or age-related component failures can also cause the module to fail, making repair or replacement inevitable.

After the vehicle's airbags are deployed, the control unit is usually locked and must be reset or replaced. This prevents accidental deployment and ensures the safety of the system.

Other reasons for failure can be internal electronic faults or communication problems within the vehicle's electrical system. A defective module impairs the entire functionality of the SRS system and requires a professional Lexus NX AZ10 airbag control unit repair.

Common error codes for Lexus NX AZ10 airbag control unit repair

During Lexus NX AZ10 airbag control unit repairs, specific error codes occur that directly indicate problems with the control unit itself or its communication pathways. These codes are crucial for a precise diagnosis and identifying the necessary steps to restore system integrity.

• B1000 → Control Unit Communication Error → This code indicates internal communication problems within the airbag control unit and may require reprogramming.
• B1866 → Open circuit knee airbag (passenger side) → Although a component is affected, this error is reported directly by the control unit and signals a problem in the associated circuit, which the control unit registers.

What part numbers are available for the Lexus NX AZ10 airbag control unit repair?

The primary and officially verified OEM part number for the Lexus NX AZ10 airbag control module is **89170-78010** from Lexus (Toyota). This number is critical for correct Lexus NX AZ10 airbag control module repair and replacement, as no alternative OEM or supplier part numbers are available.

Part number 89170-78010 is listed in official Lexus Parts catalogs for various NX variants, including the NX300h and NX300 of the AZ10 chassis series. This confirms its exclusivity and relevance for the model in question.

It's important to note that airbag sensors (e.g., 89831-78010) or the airbag module itself (e.g., 73960-78011) have different part numbers and should not be confused with the central control unit. When repairing the Lexus NX AZ10 airbag control unit, the exact module must be identified.