Airbag control unit with part number BB5T-14B321-AH

What does the airbag control unit BB5T-14B321-AH do?

The airbag control unit BB5T-14B321-AH coordinates the airbags and seatbelt pretensioners within the restraint system (SRS) of Ford. In an accident, it evaluates the crash sensors and triggers the appropriate components within milliseconds.

It monitors the entire chain of sensors and trigger elements. If it detects a deviation, it indicates this via the airbag warning light.

After an accident, the unit stores crash data and locks itself. This state must be considered when removing the unit and when sending it in.

Why does the control unit BB5T-14B321-AH fail?

The most common cause on the BB5T-14B321-AH is stored crash data, even without a triggered airbag. Other causes are ageing electronics, cold solder joints, moisture and corrosion, and voltage spikes.

A normal diagnostic tool cannot erase the crash data. Airbag24 removes this data only during the repair, because a normal diagnostic tool is not sufficient for that.

• ageing of the electronic components
• solder joints that have gone cold
• wetness and corrosion on the plugs
• voltage spikes from a weakened battery or jump-starting

How can you tell that the BB5T-14B321-AH is defective?

A defect on the BB5T-14B321-AH shows mainly through the airbag warning light in the instrument cluster, which lights up permanently or intermittently.

• the airbag warning light stays on or comes on intermittently
• an error message appears in the instrument cluster
• a diagnostic tool cannot find the control unit
• the fault memory cannot be emptied

In these cases, the airbags and seatbelt pretensioners may not trigger in an emergency. Please have the system checked promptly rather than ignoring the warning.

Which vehicles is the BB5T-14B321-AH fitted in?

The control unit BB5T-14B321-AH is fitted in these vehicles: Ford Explorer 5 (2011-2019).

The overview below shows which vehicles this unit is intended for:

• Ford Explorer 5 (2011-2019)

Comparing the part number on the label of the removed unit with this page only confirms that you have the right unit. Whether the control unit is really defective or a plug or cable is the cause is shown only by the fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers DB5T-14B321-AE, DB5T-14B321-AF, DB5T-14B321-AG, EB5T-14B321-AA, GB5T-14B321-AC, HB5T-14B321-AA.

How does the repair of the BB5T-14B321-AH work?

First have the fault memory read out and attach the log. Then disconnect the battery; only afterwards remove the BB5T-14B321-AH.

Next, create a repair order online and send the unit in well packed. Airbag24 checks it on the test bench, replaces defective components, erases stored crash data and carries out a function test. Your own unit is then returned. Processing time at Airbag24 is usually 3–4 working days.

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 BB5T-14B321-AH get to Airbag24?

You send the BB5T-14B321-AH by parcel to Airbag24 or book a collection by UPS for an extra charge. The return after the repair is also made by UPS.

The printed repair order belongs in the parcel. Pack the unit so that it is transported shockproof.