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

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

The airbag control unit D3BT-14B321-CE is the restraint system (SRS) control unit for Ford. It analyses the signals from the crash sensors, determines within milliseconds in an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously. Faults are indicated via the airbag warning light.

An accident causes the unit to store crash data and lock itself. Only a repair lifts the lock.

Even during normal operation it works constantly in the background and creates entries in the fault memory.

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

The most common cause is crash data stored after an accident, even if no airbag was deployed. A standard diagnostic tool cannot erase it. Other causes include ageing electronic components, cold solder joints, corrosion at plug connections and voltage spikes.

• Ageing components lose function over time.
• Cold solder joints can cause contact problems.
• Moisture and corrosion attack plug connections.
• Voltage spikes arise, for example, from a weak battery or a jump start.

Airbag24 deletes the crash data during the repair. The other causes cannot be reliably identified without testing the unit.

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

On the dashboard, the airbag warning light indicates the defect when it is on continuously or intermittently. Fault messages in the instrument cluster, a missing connection of the diagnostic tool or a fault memory that cannot be cleared are also signs. Airbags and seatbelt pretensioners may then not deploy in an emergency.

• Airbag warning light on in the instrument cluster
• Fault message in the instrument cluster
• Diagnostic tool finds no control unit
• Fault memory cannot be cleared

A warning light is not a minor matter, even if the car drives without problems. It requires testing.

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

The airbag control unit D3BT-14B321-CE is fitted in these vehicles: Ford Fiesta 7 ’09 (2008-2017).

The following models are on record for this part number:

• Ford Fiesta 7 ’09 (2008-2017)

Comparing the part number on the removed unit with this page is one step in identifying the correct unit. It does nothing more. Having the fault memory read out, on the other hand, shows whether the control unit is defective or whether a plug or cable is the cause. That is why this step comes before removal.

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-CE work?

First have the fault memory read out, and the log goes into the parcel. Only then disconnect the battery and remove the control unit D3BT-14B321-CE. Online you create the repair order before sending the well-packed unit in.

At Airbag24, the unit is tested on the test bench, defective components are repaired, the crash data is deleted and a functional test is carried out. Afterwards your own unit comes back to you.

Processing at Airbag24 usually takes 3–4 working days. 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-CE get to Airbag24?

You send the unit to Airbag24 as a parcel, or you book a UPS collection for an extra charge. The return after the repair is made by UPS.

Enclose the printed repair order and pack the control unit shock-proof.