Airbag control unit with part number BK3T-14B321-AD

What does the airbag control unit BK3T-14B321-AD do?

Within the restraint system (SRS) of Ford, the airbag control unit BK3T-14B321-AD evaluates the crash sensors. Within milliseconds it decides in an accident on airbags and seatbelt pretensioners, and it monitors the system continuously.

It reports detected faults via the airbag warning light. After an accident, it stores crash data and locks itself; only the repair lifts this lock.

Why does the control unit BK3T-14B321-AD fail?

The most common cause is crash data stored in the unit after an accident, even if no airbag has deployed. A normal diagnostic tool does not erase it. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes.

Airbag24 removes the crash data during the repair. A weakening battery or a jump start can cause voltage spikes.

Whether the control unit, a plug or a cable is the cause is shown only by reading out the fault memory.

How can you tell that the BK3T-14B321-AD is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. The diagnostic tool receives no connection to the control unit, and the fault memory cannot be cleared. An error message may also appear in the instrument cluster.

As long as these signs persist, airbags and seatbelt pretensioners may possibly not trigger in an emergency.

The unit reports the defect via the warning light. For this reason, take the warning light seriously from the start.

Which vehicles is the BK3T-14B321-AD fitted in?

The control unit BK3T-14B321-AD is fitted in these vehicles: Ford Transit 7 ’14 (from 2014). The part number is decisive, not a check of your car.

These vehicles are recorded for this part number:

• Ford Transit 7 ’14 (from 2014)

Comparing the number on the label with this page ensures that it is the right unit. It says nothing about the cause. Have the fault memory read out before the unit is removed: it 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 BK2T-14B321-BF, BK3T-14B321-AC, DT1T-14B321-DF, KT1T-14B321-KD, LK4Z-14B321-C, LK4Z-14B321-E.

How does the repair of the BK3T-14B321-AD work?

Processing at Airbag24 usually takes 3–4 working days. On your side, it starts with reading out the fault memory, followed by disconnecting the battery and removing the unit. Last, create the repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes the crash data and carries out a function test. Your unit then goes 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 BK3T-14B321-AD get to Airbag24?

One parcel is enough, or you book a UPS collection at your address for an extra charge. After the repair, Airbag24 sends the unit back by UPS.

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