Airbag control unit with part number DV4T-14B321-DG

What does the airbag control unit DV4T-14B321-DG do?

The airbag control unit DV4T-14B321-DG is the central control unit of the restraint system (SRS) of Ford. It evaluates the signals from the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners trigger, and monitors the system continuously. It reports faults via the airbag warning light.

The sensors continuously deliver measured values, which the control unit assesses constantly. The decision in an impact has to be made so quickly that there is no time for deliberation.

After an accident, the unit stores crash data and locks itself.

Why does the control unit DV4T-14B321-DG fail?

The most common cause is the storage of crash data after an accident, even without a triggered airbag; a normal diagnostic tool cannot erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

That no airbag has triggered does not mean that no crash data was stored. The data arise independently of that.

The other causes concern the electronics itself and its connections: components age, solder joints can turn cold, and moisture promotes corrosion at plug connections. Voltage spikes arise, for example, with a weak battery or when starting with external power.

How can you tell that the DV4T-14B321-DG is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition there are a fault message in the instrument cluster, no connection from the diagnostic tool to the control unit, and a fault memory that cannot be cleared. Then airbags and seatbelt pretensioners may not trigger in an emergency.

Most important is that the light comes on briefly after the ignition is switched on and then goes out. If it stays on or returns, there is a fault.

Have the warning clarified promptly, because you cannot know how reliably the restraint system is working at the moment.

Which vehicles is the DV4T-14B321-DG fitted in?

The control unit DV4T-14B321-DG is fitted in these vehicles: Ford Kuga 2 ’13 Facelift (2016-2019) and 2 ’13 (2012-2016).

In detail, these are the vehicle types:

• Ford Kuga 2 ’13 Facelift (2016-2019)
• Ford Kuga 2 ’13 (2012-2016)

Compare the part number on the label of the removed unit with this page. This only shows that it is the correct unit. Also have the fault memory read out before removal, because only this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285012044, CJ5T14B321AG, CV4T 14B321 CG, CV4T-14B321-CD, CV4T-14B321-CF, CV4T-14B321-CH.

How does the repair of the DV4T-14B321-DG work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Then create a repair order online and send in the unit. Processing at Airbag24 usually takes 3–4 working days.

The order of steps is a safety measure. Only once the fault memory has been secured and the battery disconnected may the control unit be removed.

At Airbag24, your unit is examined on the test bench, defective components are replaced, stored crash data is erased and a function test is carried out. Afterwards your own, repaired 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 DV4T-14B321-DG get to Airbag24?

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

Enclose the printed repair order in the parcel and pack the unit shock-resistant.