Airbag control unit with part number D3BT-14B321-CD

What does the airbag control unit D3BT-14B321-CD do?

The control unit D3BT-14B321-CD forms the switching centre of the restraint system (SRS) of Ford. It processes the readings from the crash sensors and determines in a crash which airbags and seatbelt pretensioners are triggered.

During operation the unit checks the system for faults. If it detects a fault, it shows this via the airbag warning light.

After an accident it stores crash data and locks itself.

Why does the control unit D3BT-14B321-CD fail?

Stored crash data is the most common cause, even if no airbag went off in the accident. A normal diagnostic tool cannot erase it; Airbag24 removes it during the repair. Other possible causes are aged components, cold solder joints, moisture and corrosion, and voltage spikes.

That an accident without an airbag trigger still leaves data behind is not obvious at first glance.

The other causes tend to develop gradually. Electronic components age, solder joints can stay cold, and moisture attacks the plug connections. Voltage spikes occur, for example, when starting with an external power source.

How can you tell that the D3BT-14B321-CD is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears. If no connection to the diagnostic tool can be established or the fault memory cannot be cleared, this is another sign of a fault in the D3BT-14B321-CD.

In the event of a fault, airbags and seatbelt pretensioners may not be able to trigger in an emergency. The warning must therefore be taken seriously and checked.

Which vehicles is the D3BT-14B321-CD fitted in?

The control unit D3BT-14B321-CD is used in vehicles from Ford. It is fitted in these vehicles: Ford Fiesta 7 ’09 (2008-2017).

The individual models are shown in this list:

• Ford Fiesta 7 ’09 (2008-2017)

Compare the part number on the label of the removed unit with this page; this only confirms that it is the right unit. Have the fault memory read out in advance as well. Only the log shows 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 D3BT-14B321-CD work?

Processing at Airbag24 usually takes 3–4 working days. During this time the D3BT-14B321-CD is checked, repaired and tested.

First, have the fault memory read out and attach the log to the unit. Then disconnect the battery; only after that remove the control unit. Then create a repair order online and send the unit in, well packed.

At Airbag24, defective components are replaced and stored crash data is deleted before a function test follows. Afterwards your own unit is sent 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 D3BT-14B321-CD get to Airbag24?

You send the control unit D3BT-14B321-CD to Airbag24 as a parcel; alternatively, you 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. Pack the unit shock-proof so that it arrives undamaged.