Airbag control unit with part number DM5T-14B321-KA

What does the airbag control unit DM5T-14B321-KA do?

As the central control unit of the restraint system (SRS) of Ford, the control unit DM5T-14B321-KA evaluates the signals from the crash sensors. Within milliseconds it decides which airbags and seatbelt pretensioners are triggered. After an accident, it stores crash data and locks itself.

In addition, it monitors the connected components continuously and reports faults via the airbag warning light. The monitoring therefore runs even when the vehicle is driving normally, and the entire restraint system relies on exactly that.

Why does the control unit DM5T-14B321-KA fail?

The most frequent cause with the DM5T-14B321-KA is an earlier accident, because crash data is then stored, even if no airbag was triggered. Likewise, ageing electronics, cold solder joints, moisture or corrosion at plug connectors, and voltage spikes can cause the failure.

Crash data cannot be deleted with a standard diagnostic tool. Airbag24 deletes it during the repair, so that the control unit can work cleanly again afterwards.

Whether one of the other causes is present is only clarified by the examination. Voltage spikes arise, for example, with a weak battery or jump-starting, and they load the electronics via the on-board electrical system.

How can you tell that the DM5T-14B321-KA is defective?

The airbag warning light in the instrument cluster shows steady light or lights up only intermittently as soon as there is a defect in the DM5T-14B321-KA. In addition, there is a fault message in the instrument cluster, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be cleared.

In this case airbags and seatbelt pretensioners may possibly fail to deploy in an emergency. Please take the indication seriously and have it clarified promptly.

Which vehicles is the DM5T-14B321-KA fitted in?

The DM5T-14B321-KA is fitted in these vehicles: Ford C-Max 2 (2010-2015) and 2 Facelift (2015-2019); Ford Grand C-Max 2 Facelift (2015-2019) and 2 (2010-2015).

The breakdown by model is shown in the following list.

• Ford C-Max 2 (2010-2015)
• Ford C-Max 2 Facelift (2015-2019)
• Ford Grand C-Max 2 Facelift (2015-2019)
• Ford Grand C-Max 2 (2010-2015)

Comparing the part number on the removed unit with this page only ensures that it is the right unit. Only reading out the fault memory shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 1790083, 285001452, 285011577, AM5T-14B321-AG, DM5T 14B321 SA, DM5T-14B321-EH.

How does the repair of the DM5T-14B321-KA work?

First have the fault memory of the DM5T-14B321-KA read out and enclose the log, then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in, well packed. Processing at Airbag24 takes 3–4 working days as a rule.

At Airbag24 the unit first goes on the test bench. The defective components are then replaced, the stored crash data is deleted and a functional test is carried out, before your own unit is returned.

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 DM5T-14B321-KA get to Airbag24?

You ship the DM5T-14B321-KA as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Packed shock-proof, the control unit goes into the parcel together with the printed repair order.