Airbag control unit with part number AM5T-14B321-AE

What does the airbag control unit AM5T-14B321-AE do?

The airbag control unit AM5T-14B321-AE manages the restraint system (SRS) of Ford. Based on the crash sensors, it decides which airbags and seatbelt pretensioners are triggered in an accident, and it checks the system continuously. After an accident it stores crash data and locks itself.

Triggering happens in milliseconds, so there is hardly any time to react. For that reason, every irregularity the control unit reports itself must be taken seriously.

The unit stores faults in the fault memory and shows them via the airbag warning light.

Why does the control unit AM5T-14B321-AE fail?

The most common cause is crash data: it is stored after an accident, even without a deployed airbag, and a normal diagnostic tool does not erase it. In addition there are ageing electronics, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

Crash data remains stored after an accident until it is removed. Airbag24 takes it out during the repair, because a normal diagnostic tool is not sufficient for this.

Ageing electronics, cold solder joints, and moisture and corrosion at plug connections can also lead to failures. Voltage spikes, for example from a weak battery or after jump-starting, are further causes.

How can you tell that the AM5T-14B321-AE is defective?

A fault shows itself when the airbag warning light in the instrument cluster lights up permanently or intermittently. A fault message in the instrument cluster, no contact with the diagnostic tool, or a fault memory that cannot be cleared also indicate it. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The light and the message in the instrument cluster are not minor matters. They show directly that something is wrong with the restraint system.

A fault memory that cannot be emptied is a further sign. It remains until the cause has been rectified.

Which vehicles is the AM5T-14B321-AE fitted in?

The AM5T-14B321-AE 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 vehicles from our database are listed here:

• 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)

Before the repair, two steps come first: compare the part number on the housing label with this page, which ensures you have the right unit. Then have the fault memory read out, because this result 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 1790083, 285001452, 285011577, AM5T-14B321-AG, DM5T 14B321 SA, DM5T-14B321-EH.

How does the repair of the AM5T-14B321-AE work?

You read out the fault memory first, enclose the log, disconnect the battery, remove the control unit, and create the repair order online before sending the unit in packaged. Airbag24 checks the unit, repairs defective components, deletes the crash data and carries out a functional test.

Processing at Airbag24 usually takes 3–4 working days. This period covers checking, repairing and testing alone.

At the end, your own unit arrives back with 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 AM5T-14B321-AE get to Airbag24?

The unit goes to Airbag24 by parcel, or you book a UPS collection for an extra charge. The return after the repair is also sent by UPS.

Please enclose the printed repair order and pad the unit so that it withstands vibration.