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

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

The airbag control unit FW93-14D374-BB is the central control unit of the restraint system (SRS) in Jaguar. It receives the reports from the crash sensors, selects in an accident within milliseconds the airbags and seatbelt pretensioners that should fire, and checks the system continuously.

The unit displays faults via the airbag warning light in the instrument cluster, so that malfunctions become noticeable in everyday use.

Crash data is stored in the unit after an accident. From that moment on it is locked.

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

The most common cause is crash data stored after an accident, even if no airbag has been triggered. A normal diagnostic tool cannot erase this data. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Crash data remains in the memory until Airbag24 removes it during the repair. For this reason, the fault cannot be rectified with a read-out device alone.

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connectors
• Voltage spikes, for example from a weak battery or jump-starting

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

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The light is the indication you notice first in daily life. It shows the fault regardless of how the vehicle behaves in everyday use. Have the cause clarified promptly.

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

The airbag control unit FW93-14D374-BB is fitted in these vehicles: Jaguar XJ X351 (2009-2019).

The vehicles for which this part number is given can be found in the overview.

• Jaguar XJ X351 (2009-2019)

The comparison of the part number on the label with this page shows that you have the matching unit. Whether the unit is defective, or whether a plug or cable causes the fault, is clarified only by the fault memory. So have it read out beforehand.

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

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

Have the fault memory read out in advance and attach the log to the order, then disconnect the battery and only afterwards remove the control unit FW93-14D374-BB. Processing at Airbag24 usually takes 3–4 working days.

After that you create a repair order online and send the well-packed unit. Airbag24 checks it on the test bench, repairs defective components, erases the crash data and carries out a function test.

Afterwards your own unit 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 FW93-14D374-BB get to Airbag24?

You send the control unit FW93-14D374-BB to Airbag24 as a parcel or have it collected by UPS for an extra charge. Airbag24 sends your own unit back by UPS after the repair.

The printed repair order belongs in the parcel. Pack the unit shock-resistant before it is on its way.