Airbag control unit with part number 9H52-14D374-AC

What does the airbag control unit 9H52-14D374-AC do?

The airbag control unit 9H52-14D374-AC controls the restraint system (SRS) in Land Rover. It evaluates sensor signals and decides in an emergency which airbags and seatbelt pretensioners are triggered. It also monitors the system and indicates faults via the airbag warning light.

After an accident, the unit stores crash data and locks itself. Monitoring runs in the background, and faults are logged during it.

Why does the control unit 9H52-14D374-AC fail?

Most often the 9H52-14D374-AC fails because of crash data stored in memory after an accident, even without an airbag having deployed. A normal diagnostic tool cannot erase them. Other possible causes are ageing electronics, cold solder joints, moisture at plug connections and voltage spikes.

Airbag24 erases the crash data during the repair. Which of the other causes is present is shown by the test on the test bench.

How can you tell that the 9H52-14D374-AC is defective?

A defect on the 9H52-14D374-AC is indicated by the airbag warning light in the instrument cluster, which lights up constantly or intermittently. Additionally: a message in the instrument cluster, a missing connection to the diagnostic tool and a fault memory that cannot be cleared.

While the light is on, airbags and seatbelt pretensioners may not deploy in an emergency. Have the system checked promptly; whether the control unit or the wiring is affected is clarified by evaluating the fault memory.

Which vehicles is the 9H52-14D374-AC fitted in?

The 9H52-14D374-AC is fitted in these vehicles: Land Rover Freelander 2 (2006-2010), 2 1st Facelift (2010-2012) and 2 2nd Facelift (2012-2014).

The vehicles with this part number are listed one below the other here:

• Land Rover Freelander 2 (2006-2010)
• Land Rover Freelander 2 1st Facelift (2010-2012)
• Land Rover Freelander 2 2nd Facelift (2012-2014)

Comparing the part number on the label with this page only ensures that you have the right unit in front of you. Have the fault memory read out beforehand, because only it shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 0 285 010 206, 6H52-14B321-AE, 9H52-14D374-AD, DH5214D374AA.

How does the repair of the 9H52-14D374-AC work?

First have the fault memory read out; the log goes with it. Only once the battery is disconnected do you remove the control unit 9H52-14D374-AC. Then create a repair order online and send the unit in well packed. Airbag24 needs 3–4 working days for checking, repairing and testing.

On the test bench, Airbag24 examines the unit, replaces defective components, erases stored crash data and carries out a function test. Afterwards the 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 9H52-14D374-AC get to Airbag24?

Either as a parcel or with a UPS collection booked for an extra charge, the control unit 9H52-14D374-AC reaches Airbag24. The return after the repair is made by UPS.

Pack the unit shockproof and enclose the printed repair order.