Airbag control unit with part number MK72-14D374-AB

What does the airbag control unit MK72-14D374-AB do?

The airbag control unit MK72-14D374-AB is the central control unit for the SRS restraint system of Land Rover and Jaguar. It reads the crash sensors, decides in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

A detected fault is shown by the airbag warning light in the instrument cluster. After a crash, the unit stores crash data and locks itself.

In an emergency the evaluation must succeed within fractions of a second, so the unit checks its signals continuously.

Why does the control unit MK72-14D374-AB fail?

Stored crash data from an accident is the most common cause, even if no airbag has triggered; a normal diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible.

Airbag24 removes the crash data during the repair. That they remain in the unit explains why a fault after an accident does not disappear on its own.

The other causes concern the electronics itself and its connections. Voltage spikes occur, for example, with a weak battery or when starting with a jump start. Which cause is present is shown only by testing.

How can you tell that the MK72-14D374-AB is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, an error message appears in the instrument cluster, the diagnostic tool does not find the control unit, and the fault memory cannot be cleared.

The warning light shows the defect as soon as the system detects it. As long as these signs persist, the airbags and seatbelt pretensioners may not deploy in an emergency.

A prompt check of the system is therefore the right step.

Which vehicles is the MK72-14D374-AB fitted in?

The control unit MK72-14D374-AB is fitted in these vehicles: Land Rover Discovery Sport L550 (2015-2019) and L550 Facelift (from 2019); Jaguar E-Pace X540 (2017-2020) and X540 Facelift (2020-2024). The matching is done via the part number, not via the model name.

Here you will find the vehicles that are recorded for this part number.

• Land Rover Discovery Sport L550 (2015-2019)
• Land Rover Discovery Sport L550 Facelift (from 2019)
• Jaguar E-Pace X540 (2017-2020)
• Jaguar E-Pace X540 Facelift (2020-2024)

Comparing the label number of the removed unit with this page ensures that it is the right unit. Whether the control unit is defective or a plug or cable is the cause is shown by the fault memory read-out. Have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 285020034, FK72-14D374-AF, FK72-14D374-AH, FK72-14D374-AK, FK7214D374AJ, J9C18635.

How does the repair of the MK72-14D374-AB work?

Have the fault memory read out and the log enclosed before disconnecting the battery and removing the control unit. Then create a repair order online and send the well-packed unit. Checking, repairing and testing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit that was sent in, replaces defective components and erases the stored crash data. A function test follows, and the unit is returned 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 MK72-14D374-AB get to Airbag24?

You can send the device as a parcel or book a UPS collection for an extra charge. After repair, Airbag24 sends it back to you by UPS.

Shock-resistant packaging and the printed repair order in the parcel are sufficient for this.