Airbag control unit with part number FR3T-14B321-AJ

What does the airbag control unit FR3T-14B321-AJ do?

The airbag control unit FR3T-14B321-AJ manages the restraint system (SRS) for Ford. It processes signals from the crash sensors, decides on airbags and seatbelt pretensioners in an accident, and monitors the system constantly.

If it detects a fault, it reports this via the airbag warning light in the instrument cluster. The triggering decision is made within milliseconds.

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

Why does the control unit FR3T-14B321-AJ fail?

The most common cause is stored crash data after an accident, even without an airbag having been triggered. Further causes come from the electronics and the contacts, for example through ageing, cold solder joints, wetness or voltage spikes.

Stored crash data cannot be erased with a normal diagnostic tool.

Further causes include:

• ageing of electronic components
• solder joints with contact problems
• wetness and corrosion on plugs
• voltage spikes when jump-starting or with a weak battery

How can you tell that the FR3T-14B321-AJ is defective?

A defect shows up through the airbag warning light, which stays on permanently or intermittently, through a fault message in the instrument cluster, through a missing contact with the diagnostic tool, or through a fault memory that cannot be cleared.

In the event of a defect, airbags and seatbelt pretensioners may not trigger in an emergency. For this reason the warning deserves prompt attention.

Which component is affected is only shown by the examination.

Which vehicles is the FR3T-14B321-AJ fitted in?

The FR3T-14B321-AJ is fitted in these vehicles: Ford Mustang 6 S550 (2014-2023).

The list of stored vehicles follows:

• Ford Mustang 6 S550 (2014-2023)

A comparison of the part number on the label with this page only confirms that you have the right unit. Reading out the fault memory before removal, by contrast, shows whether the control unit is defective or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 285010835, AM2T-14B321-AC, MR3T-14B321-EA.

How does the repair of the FR3T-14B321-AJ work?

You read out the fault memory and enclose the log. Only then do you disconnect the battery and remove the control unit. Finally you create the repair order online and send in the well-packed unit.

Airbag24 examines the unit on the test bench, rectifies damage to defective components, erases the crash data and carries out a function test.

Processing at Airbag24 usually takes 3–4 working days. Afterwards your own 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 FR3T-14B321-AJ get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. The return after the repair follows by UPS.

Put the printed repair order in the parcel. Pack the control unit shock-proof.