Land Rover Range Rover Sport L320 Airbag Control Unit Repair

What is a Land Rover Range Rover Sport L320 airbag control unit?

The Land Rover Range Rover Sport L320 airbag control unit is the central safety unit that activates all occupant restraint systems, such as airbags and seatbelt pretensioners, in the event of an accident. It continuously monitors various vehicle and crash sensors, stores relevant data, and ensures the proper functioning of the safety system.

This module, also known as the Restraint Control Module (RCM) or SRS control unit, processes signals from acceleration and gyro sensors. It is crucial for the vehicle's passive safety and the precise activation of the restraint systems in the event of a collision.

It communicates with all associated components via the vehicle's electrical system and special, often yellow-labeled airbag connectors. Recoding to the vehicle identification number (VIN) is required after a replacement or repair.

Why is the Land Rover Range Rover Sport L320 airbag control unit faulty?

Because an accident can leave the control unit with indelible crash data, or internal components can fail due to age, the Land Rover Range Rover Sport L320 airbag control unit can become defective. This often results in a permanently illuminated airbag warning light, preventing the safety system from functioning properly in an emergency.

After the airbags are deployed, the module permanently stores crash data, which prevents further operation and triggers the error memory. These "hard codes" cannot be erased with conventional diagnostic devices, requiring a special repair or reset.

Even without an accident, the Land Rover Range Rover Sport L320 airbag control unit can develop errors. Internal memory errors or problems with the module's self-test will then lead to failure and require a specialized Land Rover Range Rover Sport L320 airbag control unit repair.

Common error codes for Land Rover Range Rover Sport L320 airbag control unit repair

During a Land Rover Range Rover Sport L320 airbag control unit repair, specific error codes may occur that indicate internal problems or crash data. These DTCs can usually only be cleared by specialized services and affect the functionality of the module itself.

• B1000 → Control unit communication error → Often caused by internal crash data or module defect.
• B1010 → Internal memory error in the control unit → Indicates damage to the ECU software or hardware.
• B1100 → Control unit self-test failed → Indicates that the module fails its internal tests.
• B1120 → Seat belt pretensioner control circuit error (ECU specific) → An internal problem within the control module affecting the seat belt pretensioner circuit.
• B1140 → Internal EEPROM error in the airbag control unit → Critical error in the module's non-volatile memory.
• B1200 → Internal system error control unit → General error that requires a comprehensive diagnosis of the module.
• B1400 / B1401 → Internal error in the airbag ECU / Airbag ECU diagnostic output error → Problems with the internal diagnostic function of the control unit.

What part numbers are available for the Land Rover Range Rover Sport L320 airbag control unit repair?

For the Land Rover Range Rover Sport L320 airbag control unit repair, specific part numbers are relevant to ensure compatibility. The official OEM number maintained by Land Rover is LR071268, which comes directly from the manufacturer and ensures maximum compatibility.

The primary OEM part number for this airbag control unit is LR071268. This part is listed by official Land Rover parts dealers and is suitable for various models of the Range Rover Sport L320, confirming its originality and fitment.

Another OEM-like part number is DK6214D374AF, also known as DK62-14D374-AF. This is offered by specialized suppliers as a suitable replacement for the Range Rover Sport L320 (particularly 2010–2013), but comes from a supplier such as Autoliv or Siemens and is not listed as a main part in the official Land Rover catalog.