Airbag control unit with part number BS7T-14B321-AD

What does the airbag control unit BS7T-14B321-AD do?

The airbag control unit BS7T-14B321-AD is the central control unit of the restraint system (SRS) for Ford. It evaluates the signals from the crash sensors and decides in an accident which airbags and seatbelt pretensioners are triggered.

During operation the unit monitors the system continuously. If it detects a fault, it reports it via the airbag warning light in the instrument cluster.

After an accident it stores crash data and locks itself. This lock is only lifted by the repair.

Why does the control unit BS7T-14B321-AD fail?

On the BS7T-14B321-AD, stored crash data after an accident is the most common cause, even if no airbag has deployed. A normal diagnostic tool cannot erase this data. Other causes include ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Airbag24 erases the crash data during the repair. This removes the most common reason for a blocked diagnosis.

The other causes cannot be derived from the fault pattern alone. Only the inspection of the unit shows which point applies.

How can you tell that the BS7T-14B321-AD is defective?

A defect on the BS7T-14B321-AD shows when the airbag warning light stays on permanently or intermittently. In addition there is an error message in the instrument cluster, a diagnostic tool without a connection to the control unit and a fault memory that cannot be cleared.

These signs can be considered together. Anyone who keeps an eye on the warning light notices a change early.

Airbags and seatbelt pretensioners may possibly not trigger in an emergency if the fault is present. Please have the warning checked.

Which vehicles is the BS7T-14B321-AD fitted in?

The BS7T-14B321-AD is fitted in these vehicles: Ford Mondeo 4 ’07 Facelift (2010-2014).

The vehicles for this unit are listed below:

• Ford Mondeo 4 ’07 Facelift (2010-2014)

Compare the part number on the label of the removed unit with this page; this confirms that it is the right unit. Have the fault memory read out beforehand, because only this result shows whether the control unit is defective or a wire and a plug are the cause.

For the same vehicles, we also repair control units with the part numbers 285010228, 670013905702, 7S7T-14B056-AC, 7S7T-14B056-AD.

How does the repair of the BS7T-14B321-AD work?

For the repair of the BS7T-14B321-AD, read out the fault memory first and enclose the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 tests the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. After that, 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 BS7T-14B321-AD get to Airbag24?

You send the control unit BS7T-14B321-AD as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.