Airbag control unit with part number J9C3-14D374-AK

What does the airbag control unit J9C3-14D374-AK do?

The airbag control unit J9C3-14D374-AK forms the central control of the restraint system (SRS) of Jaguar. It evaluates the crash sensors, decides in a crash within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit reports faults via the airbag warning light in the instrument cluster. This is how you notice that something is wrong in the restraint system.

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

Why does the control unit J9C3-14D374-AK fail?

The most common cause is crash data from an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Other causes lie in the electronics and their surroundings.

The crash data remain in the unit after the accident, and Airbag24 erases them during the repair. Reading out with a common tool does not solve the problem.

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

How can you tell that the J9C3-14D374-AK is defective?

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently. Add to that an error message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared. In that case, airbags and seatbelt pretensioners may not deploy in an emergency.

The airbag warning light is the signal the control unit gives itself. So have the system checked promptly as soon as it lights up.

An error message in the instrument cluster is also a reason to have the vehicle checked promptly.

Which vehicles is the J9C3-14D374-AK fitted in?

The J9C3-14D374-AK is fitted in these vehicles: Jaguar E-Pace X540 (2017-2020) and X540 Facelift (2020-2024).

Here you can see the vehicles for which this part number is stated.

• Jaguar E-Pace X540 (2017-2020)
• Jaguar E-Pace X540 Facelift (2020-2024)

Compare the part number on the label of the removed unit with this page. This shows you whether you have the right unit in front of you. Also have the fault memory read out before removal, because only it 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 J9C18635, J9C30575, J9C314D374AJ, M9C3044A74BB, M9C3044A74BC, MK72-14D374-AE.

How does the repair of the J9C3-14D374-AK work?

First you read out the fault memory and enclose the log. Then you disconnect the battery, remove the control unit, create a repair order online and send the unit in well packed. Airbag24 checks it on the test bench, repairs defective components, erases crash data and carries out a function test.

The order of these steps is fixed for safety reasons. 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 J9C3-14D374-AK get to Airbag24?

You send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.