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

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

The airbag control unit J8A2-14D374-AE controls the restraint system (SRS) of Land Rover. It evaluates the crash sensors and triggers the appropriate airbags and seatbelt pretensioners within milliseconds in an accident.

In addition, it monitors the entire system and shows faults via the airbag warning light.

After an accident, the unit stores crash data and locks itself. Between accidents, it works in the background and checks the connections.

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

The most common cause for the J8A2-14D374-AE is crash data from an accident, even if no airbag has fired; an ordinary diagnostic tool cannot erase it. Ageing components, cold solder joints, moisture and corrosion on plug connections, as well as voltage spikes, also play a role, for example with a weak battery or a jump start.

After an accident, the unit creates crash data, and these entries persist even if nothing else in the electronics has changed.

The other causes are more insidious. Components age, solder joints can go cold, and moisture attacks contacts. Voltage spikes, on the other hand, arise suddenly, for example from a weak battery.

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

The airbag warning light in the instrument cluster indicates a defect in the J8A2-14D374-AE by staying on permanently or intermittently. In addition, fault messages appear in the instrument cluster, the diagnostic tool has no contact with the unit, and the fault memory cannot be cleared.

If one of these signs persists, airbags and seatbelt pretensioners may not trigger in an emergency. Have it checked, therefore.

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

At Land Rover, the J8A2-14D374-AE is fitted in these vehicles: Land Rover Range Rover Velar L560 (2017-2023).

You will find the vehicles in the list here.

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

First check the part number on the label of the removed unit against this page. Then have the fault memory read out beforehand; only then does it become clear whether the control unit is defective or whether 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-AE work?

First have the fault memory read out and attach the log. Then disconnect the battery, and only then remove the control unit. Create a repair order online. Processing at Airbag24 takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases crash data and carries out a function test.

Afterwards, the unit returns 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-AE get to Airbag24?

You send the J8A2-14D374-AE to Airbag24 as a parcel or book a UPS collection for an extra charge. Airbag24 sends the repaired unit back by UPS.

Pack the unit shock-proof and enclose the printed repair order.