Airbag control unit with part number AA6T-14B321-EA

What does the airbag control unit AA6T-14B321-EA do?

The airbag control unit AA6T-14B321-EA belongs to the restraint system (SRS) of Ford and controls it. From the signals of the crash sensors it calculates in an accident, within milliseconds, which airbags and seatbelt pretensioners to trigger, and it monitors the system continuously.

It shows faults via the airbag warning light. After an accident it stores crash data and locks itself. This lock is lifted only by a repair.

Why does the control unit AA6T-14B321-EA fail?

Crash data stored after an accident forms the most common cause, even without a deployed airbag. Removing it is not possible with ordinary diagnostic equipment. Further causes are ageing electronic components, cold solder joints, moisture on plug connectors and voltage spikes, for example with a weak battery or jump-starting.

Airbag24 deletes the crash data during the repair, which does not contradict this. Only the test on the test bench shows which cause is actually present.

How can you tell that the AA6T-14B321-EA is defective?

The defect makes itself known through the airbag warning light, which lights up in the instrument cluster permanently or only intermittently, and through error messages. In addition there is no contact with the diagnostic tool and a fault memory that cannot be cleared. Airbags and seatbelt pretensioners may then not deploy in an emergency.

In detail, the following points stand out:

• The airbag warning light in the instrument cluster stays on permanently or keeps coming on.
• An error message appears in the instrument cluster.
• The diagnostic tool does not establish a connection to the control unit.
• The fault memory cannot be cleared.

Which vehicles is the AA6T-14B321-EA fitted in?

The AA6T-14B321-EA is found in the following vehicles: Ford Fiesta 7 ’09 (2008-2017).

The list below names the individual vehicles:

• Ford Fiesta 7 ’09 (2008-2017)

Comparing the part number on the label of the removed unit only shows that you have the right unit. Whether the control unit itself is defective or a plug or cable is the cause is established only by reading the fault memory, which you should therefore arrange in advance.

For the same vehicles, we also repair control units with the part numbers C1BT-14B321-CF, H1BT-14B321-AH, H1BT-14B321-AJ.

How does the repair of the AA6T-14B321-EA work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Next, create the repair order online and send the unit in well packed.

At Airbag24 the unit is checked on the test bench. Defective components are repaired, the stored crash data is deleted, and a function test concludes the work. Processing usually takes 3–4 working days.

You then receive your own unit back. 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 AA6T-14B321-EA get to Airbag24?

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

The printed repair order goes into the parcel; you secure the unit itself shock-proof.