Airbag control unit with part number FW93-14D374-AB

What does the airbag control unit FW93-14D374-AB do?

The airbag control unit FW93-14D374-AB forms the central control unit of the restraint system (SRS) for Jaguar. It processes the signals from the crash sensors, decides in an accident on the triggering of airbags and seatbelt pretensioners, and monitors the system constantly.

The decision is made within a few milliseconds. For this, sensors, wiring and output stages have to work together, and the unit checks this chain continuously itself.

If it detects a fault, it reports it via the airbag warning light. After an accident it also stores crash data and locks itself. The lock is only lifted by the repair.

Why does the control unit FW93-14D374-AB fail?

The most common cause is crash data that remains in the memory after an accident, even if no airbag fired; a usual diagnostic tool cannot remove it. Further causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example with a weak battery or jump starting. Airbag24 deletes the crash data during the repair.

Crash data are the records of the accident situation. They remain in the unit until Airbag24 removes them.

The other causes act over a longer period: electronics age, solder joints give way, and moisture and corrosion attack the plug connections. Voltage spikes additionally load the components.

How can you tell that the FW93-14D374-AB is defective?

Typical signs of a defect on the FW93-14D374-AB are a warning light that stays on permanently or intermittently, an error message in the instrument cluster, a missing connection to the diagnostic tool, and a fault memory that cannot be cleared.

Once the light comes on, airbags and seatbelt pretensioners may possibly not trigger in an emergency. This has to be clarified promptly.

A diagnostic tool that cannot establish a connection also indicates a fault.

Which vehicles is the FW93-14D374-AB fitted in?

The FW93-14D374-AB is fitted in these vehicles: Jaguar XJ X351 (2009-2019).

You will find a listing of the assigned models here:

• Jaguar XJ X351 (2009-2019)

Comparing the part number on the label with this page only confirms that you have the right control unit in front of you. Whether it is defective or a cable or plug is the cause is shown only by the fault memory, which you should have read out before removal.

For the same vehicles, we also repair control units with the part numbers C2D5633.

How does the repair of the FW93-14D374-AB work?

First you have the fault memory read out and attach the log. Then disconnect the battery before you remove the control unit. Afterwards you create the repair order online and send in the unit well packed.

Airbag24 checks the unit on the test bench, repairs defective components and deletes the crash data, then carries out a function test. Afterwards your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days. 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 FW93-14D374-AB get to Airbag24?

You send the control unit FW93-14D374-AB to Airbag24 as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

The printed repair order goes into the parcel, and the unit must be packed shock-proof.