What is a Jaguar Daimler XJ X350 airbag control unit?
The Jaguar Daimler XJ X350 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.
This essential component, also known as the Restraint Control Module (RCM), is responsible for the precise control of the airbags and seat belt pretensioners in the X350 and X358 models (model years 2003-2009).
It acts as the brain of the passive safety system and is firmly integrated into the vehicle.
Why is the Jaguar Daimler XJ X350 airbag control unit defective?
A Jaguar Daimler XJ X350 airbag control unit often fails because it stores crash data after an accident that needs to be erased, or internal components can fail. A failure then causes the airbag system to stop functioning and warning lights to activate in the dashboard, necessitating immediate repair of the Jaguar Daimler XJ X350 airbag control unit.
Common causes of failure are overvoltages, aging of the electronics or improper disassembly, which can damage the module.
If your Jaguar displays an airbag warning light or the systems cannot be reset after an accident, the control module may be faulty.
A professional diagnosis in a specialized workshop is essential to determine the exact cause of the fault.
Common error codes for Jaguar Daimler XJ X350 airbag control unit repair
During Jaguar Daimler XJ X350 airbag control unit repairs, specific error codes often occur that indicate problems within the airbag system. These codes help identify the exact cause of the failure, whether it's a circuit fault or a lack of communication from the control unit, and are crucial for precise diagnosis and repair.
- **B019**: Airbag Circuit Status Fault – Driver | Indicates a fault in the driver's airbag circuit | Often caused by problems with the steering wheel clock spring or wiring.
- **B1000**: Control unit communication error | Means that the airbag control unit is not accessible | Occurs if the ECU is defective or crash data has not been deleted after an accident.
These specific B-codes are directly associated with the airbag control unit and require detailed analysis by a Jaguar-specific diagnostic tool.
A professional repair, which includes deleting crash data, can fix these errors and restore functionality.
What part numbers are available for the Jaguar Daimler XJ X350 airbag control unit repair?
For Jaguar Daimler XJ X350 airbag control unit repair, the primary assigned genuine Jaguar part numbers are 4R83-14B321-AC and 2W93-2C496-BA. These numbers help identify the correct replacement or repair part, although exact verification for your specific vehicle model should be performed by a qualified technician.
The part numbers mentioned are compatible with Jaguar XJ X350 and X358 models from 2003 to 2009 and have been identified as Restraint Control Modules.
Although suppliers such as Bosch, Autoliv and Continental manufacture airbag systems, no explicit OEM part numbers from these manufacturers are directly assigned to the Jaguar XJ X350 airbag control unit.
A careful check of the part number on the removed module is always recommended before attempting a Jaguar Daimler XJ X350 airbag control unit repair or replacement.