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

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

The control unit BK3T-14B321-BC coordinates the restraint system (SRS) in the Ford vehicle. It evaluates the crash sensors, decides in an accident which airbags and seatbelt pretensioners fire, and checks the system continuously. It shows faults via the airbag warning light.

The control decides on the basis of the sensor data, without you having to intervene.

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

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

The most common trigger is crash data from an accident in which possibly no airbags deployed. Alongside this are ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a jump-start or a weak battery.

An ordinary read-out does not make this data disappear. Airbag24 clears it during the repair.

Ageing components, cold solder joints and moisture cannot be reliably assessed without opening the unit.

Voltage spikes in the vehicle's electrical system affect the electronics; only the test shows which cause applies.

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

The airbag warning light in the instrument cluster stays on permanently or intermittently and thus indicates a fault. In addition, a fault message in the instrument cluster, a lack of connection to the diagnostic tool, and a fault memory that cannot be cleared may occur.

In that case there is a risk that the airbags and seatbelt pretensioners may not deploy in an emergency.

The warning light is therefore a reason to have the system checked promptly.

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

The control unit BK3T-14B321-BC is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The list shows the assignment by model:

• Ford Transit 7 ’14 (from 2014)

Comparing the label with this page only shows whether it is the right unit. Have the fault memory read out before removal, because only the log reveals whether the control unit is defective or a plug or 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-BC work?

First have the fault memory read out and enclose the log. Disconnect the battery before the control unit is removed. Create the repair order online and send the unit in, well packed.

At the Airbag24 laboratory the unit undergoes a visual inspection, then defective components are replaced. The crash data is erased in the process, and the function test completes the work. Airbag24 usually expects 3–4 working days for processing, after which 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 BK3T-14B321-BC get to Airbag24?

You either send the unit as a parcel or arrange a UPS collection for an extra charge. The return shipment from Airbag24 is also made by UPS. The printed repair order goes into the parcel.

Pack the control unit shock-resistant, and it will survive shipping undamaged.