Airbag control unit with part number C1BT-14B321-CD

What does the airbag control unit C1BT-14B321-CD do?

The airbag control unit C1BT-14B321-CD manages the restraint system (SRS) in the Ford vehicle. It reads sensor signals, determines within milliseconds in the event of a crash which airbags and seatbelt pretensioners to trigger, and monitors the system during operation.

The control unit outputs faults via the airbag warning light in the instrument cluster. This lets you know while driving when something is not right.

After a crash the unit stores crash data in its memory and locks itself.

Why does the control unit C1BT-14B321-CD fail?

The most common cause is crash data from an accident, even if no airbag was deployed. Further causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, such as those that occur with a weak battery or jump-starting.

Crash data remains in the unit after an accident, and a normal diagnostic tool does not erase it. Airbag24 erases it in the course of the repair.

The other causes are more of a technical nature. Ageing electronic components change their properties, cold solder joints lose contact, and moisture with corrosion impairs plug connections. Voltage spikes can also disturb the electronics, for example when starting with a weak battery.

How can you tell that the C1BT-14B321-CD is defective?

A defect shows itself through an airbag warning light that lights up permanently or intermittently, through an error message in the instrument cluster, through a missing connection to the diagnostic tool, or through a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not deploy.

These signs at a glance:

• Airbag warning light lights up permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool does not reach the control unit
• Fault memory cannot be cleared

Whether such a sign is caused by the control unit itself is only shown by the readout. Until then, it is worth not ignoring the display.

Which vehicles is the C1BT-14B321-CD fitted in?

The airbag control unit C1BT-14B321-CD is fitted in these vehicles: Ford Fiesta 7 ’09 (2008-2017).

The assignment to vehicles is shown in this list:

• Ford Fiesta 7 ’09 (2008-2017)

Comparing the part number on the label of the removed unit with this page makes sure that you have the right unit. The fault memory shows the condition. Have it read out before removal, because it shows whether the control unit or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers C1BT-14B321-CF, H1BT-14B321-AH, H1BT-14B321-AJ.

How does the repair of the C1BT-14B321-CD work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the control unit. Afterwards create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

This sequence is binding for your safety.

At Airbag24 the team checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. The unit then returns 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 C1BT-14B321-CD get to Airbag24?

You either send the unit in as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends your own unit back by UPS after the repair.

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