What is a Lexus IS IS350 airbag control unit?
The Lexus IS IS350 airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It processes signals from various sensors, stores crash data, and ensures the proper functioning of all airbag modules and seatbelt pretensioners in the vehicle to ensure maximum safety.
This electronic module, also called the SRS computer, continuously monitors the Supplemental Restraint System (SRS).
In the event of an impact, it decides on the precise deployment of the airbags and other restraint systems.
The control unit is closely linked to other driver assistance systems such as ABS and VSC of the Lexus IS350.
A functioning module is crucial for the 2014-2017 Lexus IS350 (XE30 generation).
Why is the Lexus IS IS350 airbag control unit defective?
A Lexus IS IS350 airbag control unit is often defective because it permanently stores crash data after an accident, has internal circuit faults, or has disrupted communication with other systems such as seat belt pretensioners, which activates the airbag warning light and impairs functionality.
Because crash data is stored in the module, it must be reset or replaced after an accident.
Internal electronic defects or aging can also cause the airbag control unit to fail.
Sometimes communication problems with sensors or belt tensioners lead to error messages on the control unit.
The airbag warning light in the dashboard often signals a defect or malfunction in the system that requires a Lexus IS IS350 airbag control unit repair.
Common error codes for Lexus IS IS350 airbag control unit repair
Common error codes in Lexus IS IS350 airbag control unit repair signal problems such as stored crash data after an impact, malfunctions in the internal monitoring systems, or opens in the airbag circuits that require immediate diagnosis and repair.
- **B1100:** Crash data stored → After an accident, the module must be reset or replaced for the airbag warning light to go out.
- **B1926:** Airbag Malfunction (Outer Belt Tensioner) → This control unit-specific trouble code indicates communication or monitoring problems with the belt tensioner.
- **B1861:** Open circuit in driver knee airbag squib → The control module reports an open circuit in the airbag circuit, which requires detailed diagnosis.
These error codes are specific to the airbag control unit and can be read with high-quality OBD-II scanners.
They usually require professional diagnosis and repair by a qualified workshop.
A correct diagnosis is crucial to correcting the problem with the Lexus IS350 airbag system.
What part numbers are available for the Lexus IS IS350 airbag control unit repair?
For the Lexus IS IS350 airbag control unit repair, specific OEM part numbers from Lexus itself are relevant, including 89170-53250, 89170-53470, 89170-53700 and 89170-53850, which ensure an exact fit and functionality for your vehicle.
These numbers are verified exclusively for the Lexus IS350 airbag control unit.
These are genuine Lexus OEM parts that have been repeatedly confirmed through official catalogs and dealer sources.
To date, no alternative OEM part numbers from suppliers such as Bosch or Continental are known directly for this specific module.
When repairing the Lexus IS IS350 airbag control unit, always pay attention to the exact part number to ensure compatibility.