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

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

The control unit C1BT-14B321-AB controls the restraint system in Ford vehicles. It processes the signals from the crash sensors and, in an accident, triggers the intended airbags and seatbelt pretensioners within milliseconds.

During operation it checks the system constantly. If it detects a fault, it stores the fault and shows it via the airbag warning light.

After an accident the unit stores crash data and locks itself.

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

For the C1BT-14B321-AB, the most common cause is crash data stored after an accident, even without a triggered airbag. Further causes are aged components, moisture at plug connections and voltage spikes.

This crash data cannot be erased with a normal diagnostic tool. Airbag24 removes it during the repair.

Further causes may also lead to failure:

• aged electronic components
• cold solder joints on the circuit board
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

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

A defect in the C1BT-14B321-AB shows itself through an airbag warning light that lights up permanently or intermittently, through an error message in the instrument cluster, or through a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not fire.

The warning light is the most important indication from the vehicle. It shows the fault even when little seems wrong in everyday driving.

Only reading out the memory shows whether an entry remains stored. If the light goes out after starting, that does not automatically mean everything is in order.

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

The control unit C1BT-14B321-AB is fitted in these vehicles: Ford Fiesta 7 ’09 (2008-2017). If your car is listed here, the unit is recorded for this model.

The list below shows the models to which we have assigned this unit.

• Ford Fiesta 7 ’09 (2008-2017)

Check the part number on the label of the removed unit against this page. This only confirms that it is the correct unit.

Have the fault memory read out beforehand. Only then does it become clear whether the control unit is defective or whether a plug or a 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-AB work?

Processing at Airbag24 takes 3–4 working days for the C1BT-14B321-AB as a rule. Beforehand, have the fault memory read out, disconnect the battery, and only then remove the control unit.

This order is mandatory for safety reasons. Afterwards, create a repair order online and send the unit in well packed.

At Airbag24 the unit is examined on the test bench. Defective components are replaced, stored crash data is deleted and a function test is carried out before your own unit is returned 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-AB get to Airbag24?

Send the control unit C1BT-14B321-AB as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 brings the unit back to you by UPS.

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