Airbag control unit with part number J8A2-14D374-AJ

What does the airbag control unit J8A2-14D374-AJ do?

The airbag control unit J8A2-14D374-AJ is the central control unit of the restraint system (SRS) of Land Rover. It processes the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

During operation the unit monitors the entire system continuously. If it detects a fault, it shows this via the airbag warning light in the instrument cluster.

After an accident the unit stores crash data and locks itself. Only the repair lifts the lock.

Why does the control unit J8A2-14D374-AJ fail?

The most common cause for the J8A2-14D374-AJ is crash data stored after an accident, even if no airbag was triggered. Other causes are ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data cannot be removed with a normal diagnostic tool. Airbag24 clears it during the repair.

Ageing electronics and cold solder joints only show up after prolonged use. Voltage spikes, by contrast, arrive suddenly, for example through a weak battery or a jump start.

How can you tell that the J8A2-14D374-AJ is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently as soon as there is a fault on the J8A2-14D374-AJ. A fault message in the instrument cluster is added, and the diagnostic tool finds no connection to the control unit.

The fault memory then cannot be cleared. As long as this condition persists, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory cannot be cleared

Which vehicles is the J8A2-14D374-AJ fitted in?

The control unit J8A2-14D374-AJ is fitted in these vehicles: Land Rover Range Rover Velar L560 (2017-2023).

The following is the list of vehicles for which this unit is registered.

• Land Rover Range Rover Velar L560 (2017-2023)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Have the fault memory read out beforehand, since only that shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers LR037934, LR118105, LX73-14D374-AC.

How does the repair of the J8A2-14D374-AJ work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit. Next, create a repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, clears the crash data and carries out a function test. Processing at Airbag24 usually takes 3–4 working days. The unit then goes back to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit J8A2-14D374-AJ get to Airbag24?

You send the control unit J8A2-14D374-AJ as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 returns it by UPS.

Put the printed repair order into the parcel. Pack the control unit shock-proof.