Airbag control unit with part number BC24-14B321-BD

What does the airbag control unit BC24-14B321-BD do?

The airbag control unit BC24-14B321-BD is the central control unit of the restraint system (SRS) for Ford. It evaluates the crash sensors, decides in an emergency within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The sensors continuously deliver deceleration values to the unit. If it detects an event that requires triggering, it controls the restraint devices. It stores faults and shows them via the airbag warning light.

After an accident, the unit stores crash data and locks itself. This fact must therefore always be taken into account during repairs.

Why does the control unit BC24-14B321-BD fail?

Stored crash data are the most common cause on the BC24-14B321-BD, namely after an accident, even if no airbag was triggered. Further causes are aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

The crash data are stored in the memory of the unit and cannot be removed with a standard diagnostic tool. The fault therefore persists even after reading out.

Electronic components also age over time. Solder joints can become cold, while moisture and corrosion attack the contacts in plug connectors.

Voltage spikes include, for example, a weak battery or a jump start that was connected incorrectly.

How can you tell that the BC24-14B321-BD is defective?

You can recognise a defect on the BC24-14B321-BD by the airbag warning light in the instrument cluster, by fault messages there, by a missing connection of the diagnostic tool and by a fault memory that cannot be cleared.

The following signs typically occur together:

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may fail to trigger while the fault persists. Therefore have the system checked promptly.

Which vehicles is the BC24-14B321-BD fitted in?

The BC24-14B321-BD is fitted in these vehicles: Ford E-Series 4 (2008-2020).

The vehicles assigned to the unit are shown below.

• Ford E-Series 4 (2008-2020)

Compare the part number on the label of the removed unit with this page, which establishes that it is the right unit. Also have the fault memory read out beforehand. Only the result clarifies whether the control unit itself is defective or whether a plug or cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers 8C2Z-14B321-A, 9C24-14B321-BJ, AC24-14B321-BA, BC24-14B321-AB, BC24-14B321-AC, BC24-14B321-AD.

How does the repair of the BC24-14B321-BD work?

First have the fault memory read out and enclose the log with the unit, then disconnect the battery and remove the control unit. Then create a repair order online and send the unit in well packed. At Airbag24, processing usually takes 3–4 working days.

This order serves safety during removal.

Airbag24 checks the unit. It does not replace the entire system but only defective components, deletes the stored crash data and carries out a functional test. 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 BC24-14B321-BD get to Airbag24?

You send the BC24-14B321-BD as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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