Airbag control unit with part number LR081400

What is the function of the LR081400 Airbag Control Unit?

The LR081400 Airbag Control Unit, also known as the Airbag Diagnostic Module, is the central control unit for the entire restraint system in Land Rover vehicles. It processes data from crash sensors, monitors all safety components such as airbags and seatbelt pretensioners, and determines whether to deploy them.

As an original OEM part from Jaguar Land Rover, this module serves as the brain of the safety system. It continuously performs self-diagnostic checks to ensure the ongoing operational readiness of all connected components. If a fault is detected, the airbag warning light in the cockpit is immediately activated.

Technical identification is crucial. This control unit is also known under the alternative part numbers YWC106910 and FK7214D374AJ and is compatible with them. Proper matching ensures that full functionality is maintained in the vehicle.

Why does the LR081400 Airbag Control Unit fail?

The most common causes of failure for the LR081400 control unit are internal hardware and software faults, often resulting from aging, moisture, or after an accident. A typical defect is the storage of crash data, which can lock the system and prevent further operation until repaired.

After a collision, the control unit stores relevant crash information and locks itself for safety reasons. This is an intended feature, but it requires professional repair to reactivate the system. Simply clearing error codes is not sufficient.

Hardware defects on the circuit board are another widespread cause. Aging electronic components such as capacitors or processors may fail. Similarly, ingress of moisture can lead to corrosion and short circuits, often resulting in total failure.

A complete loss of communication is among the most serious issues. In this case, the control unit becomes unreachable via the diagnostic interface. The cause almost always lies in a critical defect in the internal power supply or the main processor on the circuit board.

How do you recognize a defect in the LR081400?

The clearest symptom of a defect in the LR081400 control unit is the permanently illuminated airbag warning light on the instrument cluster. Often, the module can no longer be accessed with a diagnostic tool, making external fault analysis impossible and pointing directly to an internal malfunction.

The airbag warning light is the vehicle’s primary warning signal. It indicates that the airbag control unit’s self-diagnostic system has identified a critical error, prompting the precautionary deactivation of the entire restraint system.

Another clear sign is the lack of communication. When a workshop attempts to read the fault memory, the diagnostic device receives no response from the airbag control unit. The system thus remains invisible to external analysis.

In the event of such a defect, passenger safety is no longer guaranteed. Airbags and seatbelt pretensioners will not deploy in a crash because the central control unit has failed. Prompt diagnosis and repair are therefore essential.

In which vehicles is the LR081400 installed?

The airbag control unit with part number LR081400 is specifically used in various Land Rover models. It is primarily found in the Land Rover Discovery 5 and the Discovery G4. Airbag24 offers professional, cost-effective repairs for these vehicles.

At Airbag24, we repair the LR081400 control unit for the following models:

Land Rover Discovery 5 (model years 2017–2020)

Land Rover Discovery 5 Facelift (from model year 2021 onward)

Land Rover Discovery G4

To ensure exact compatibility, verifying the part number before sending the unit is critical. The alternative numbers YWC106910 and FK7214D374AJ refer to technically identical control units.

How does the LR081400 repair process work at Airbag24?

The repair process begins with removing the control unit from the vehicle and shipping it to Airbag24. Following precise diagnostics using calibrated test equipment, defective components are replaced, the circuit board is refurbished, and the software is reprogrammed. A final test confirms full functionality.

Once the removed control unit arrives at Airbag24, a comprehensive incoming inspection takes place. Our technicians use specialized test environments that simulate the Land Rover Discovery’s vehicle electronics to pinpoint the exact fault.

The actual repair is performed at the component level. Defective parts such as processors, memory chips, or capacitors are replaced with high-quality, original-equipment-grade spare parts. Subsequently, the circuit board undergoes professional refurbishment to ensure long-term stability.

After hardware repair, the control unit’s software is reset or reprogrammed to erase crash data and restore factory settings. Each repair is completed with a thorough functional test and documented in an inspection report. You receive 2 years' statutory liability for defects on the repair performed.