Airbag control unit with part number L8B2-14D374-AB

What does the airbag control unit L8B2-14D374-AB do?

The airbag control unit L8B2-14D374-AB is the central control unit of the restraint system (SRS) for Land Rover. It evaluates the signals from the crash sensors and, in the event of an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

It monitors the system constantly and reports faults via the airbag warning light in the instrument cluster. Airbags and seatbelt pretensioners are only as effective as the control that triggers them.

After an accident, it stores crash data and locks itself.

Why does the control unit L8B2-14D374-AB fail?

The failure of the L8B2-14D374-AB most often results from crash data stored after an accident, even if no airbag has deployed. Other causes include aged components, cold solder joints, moisture and voltage spikes. With this control unit, deleting the crash data is often not possible; if you would like it deleted, please contact Airbag24 briefly before sending it in.

Aged electronic components can cause faults after prolonged use, and cold solder joints lead to intermittent contact problems.

Moisture and corrosion on plug connections disrupt the contact. Voltage spikes, for example from a weak battery or a jump start, can stress the electronics.

Only the evaluation of the fault memory shows whether one of these causes is present.

How can you tell that the L8B2-14D374-AB is defective?

You can recognise a defect in the L8B2-14D374-AB by the airbag warning light in the instrument cluster, an error message there, a diagnostic tool without a connection to the control unit, or a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then not deploy in an emergency.

• The warning light lights up permanently or intermittently.
• The instrument cluster displays an error message.
• The diagnostic tool finds no connection to the control unit.
• The fault memory cannot be cleared.

Even an intermittent light indicates a fault.

Which vehicles is the L8B2-14D374-AB fitted in?

The control unit L8B2-14D374-AB is a component for vehicles of the Land Rover brand. It is fitted in these vehicles: Land Rover Discovery 5 (2017-2020).

The individual vehicles are shown in this list:

• Land Rover Discovery 5 (2017-2020)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. Also have the fault memory read out before you remove the unit. Only this shows whether the control unit is defective or a connector or cable is the cause. A defect cannot be confirmed before the fault memory has been read.

For the same vehicles, we also repair control units with the part numbers FK7214D374AJ, K8D2-14D374-AB, LR081400, YWC106910.

How does the repair of the L8B2-14D374-AB work?

For the repair of the L8B2-14D374-AB, first have the fault memory read out and include the report in the parcel. Then disconnect the battery, remove the control unit, create a repair order online and send in the securely packed unit. Processing at Airbag24 usually takes 3–4 working days.

This order of steps is mandatory for safety reasons. Airbag24 checks the unit on the test bench, replaces defective components and carries out a function test. Then your own unit is returned to you.

If you would like the crash data deleted, please contact Airbag24 briefly before sending the unit in.

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 L8B2-14D374-AB get to Airbag24?

You send the L8B2-14D374-AB as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

Put the printed repair order into the parcel and pack the unit so that it is shockproof.