Airbag control unit with part number 8C3414B321AB

What does the airbag control unit 8C3414B321AB do?

The airbag control unit 8C3414B321AB is the central control unit of the restraint system (SRS) for Ford. It evaluates the signals from the crash sensors and, in an accident, triggers airbags and seatbelt pretensioners within milliseconds.

During operation it checks the system continuously; faults appear via the airbag warning light.

After an accident it secures crash data and locks itself.

Why does the control unit 8C3414B321AB fail?

Stored crash data is the most common cause, even if no airbag was triggered. A normal diagnostic tool cannot remove it. Other causes are aged electronic components, cold solder joints, moisture at plug connections with corrosion, and voltage spikes.

Airbag24 removes the crash data during the repair.

Among the other causes are aging electronics, poorly soldered spots, and wetness and rust at plug connections. Voltage spikes, for example when the battery is weakening, can also harm the unit.

How can you tell that the 8C3414B321AB is defective?

A defect shows itself through the airbag warning light, which stays on or lights up repeatedly, through a message in the instrument cluster, through a missing connection to the diagnostic tool, or through a fault memory that cannot be cleared. In that case the airbags and seatbelt pretensioners may not trigger in an emergency.

The light is therefore a warning signal that must be taken seriously.

A failure of communication with the diagnostic tool does not have to originate in the control unit. Plugs, cables and the power supply are equally possible; which case applies is clarified only by the readout.

Which vehicles is the 8C3414B321AB fitted in?

The control unit 8C3414B321AB is fitted in these vehicles: Ford F-Series Super Duty 2 (2008-2010). The assignment depends on the part number, not on the condition of the unit.

Which models belong to it is shown in the overview here.

• Ford F-Series Super Duty 2 (2008-2010)

A comparison of the part number on the label with this page ensures that you have removed the right unit. Have the fault memory read out beforehand as well. Only this log shows whether the control unit itself is defective or whether a plug or cable is the cause.

How does the repair of the 8C3414B321AB work?

Before removal you have the fault memory read out and attach the log; then disconnect the battery. Only then remove the control unit 8C3414B321AB, create a repair order online and pack the unit well. Processing at Airbag24 usually takes 3–4 working days.

The requirement is set for safety reasons. Without a disconnected battery, removal would not be harmless.

At Airbag24 there follow inspection, repair of defective components, deletion of the crash data and a function test. Afterwards your own unit is sent 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 8C3414B321AB get to Airbag24?

Optionally you send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair the unit comes back to you by UPS.

Place the printed repair order in the parcel, and the control unit must be packed shock-proof.