Airbag control unit with part number BK2T-14B321-AC

What does the airbag control unit BK2T-14B321-AC do?

The airbag control unit BK2T-14B321-AC controls the restraint system (SRS) for Ford. It reads measurement values from the crash sensors and, in an impact, decides within milliseconds which airbags and seatbelt pretensioners are activated.

The unit checks the system itself continuously. Faults reach the driver via the airbag warning light in the instrument cluster.

After an accident it records crash data and stays locked until the repair; only the repair lifts the lock.

Why does the control unit BK2T-14B321-AC fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. Normal diagnostic tools cannot erase it; Airbag24 takes care of this during the repair. In addition there are aged electronics, cold solder joints, moisture or corrosion on plugs, and voltage spikes, for example from a weak battery or from jump-starting.

A cause does not necessarily lie inside the unit. External influences on plugs and cables can also lead to faults, which is why the repair checks the entire unit.

How can you tell that the BK2T-14B321-AC is defective?

A defect shows up on the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition a fault message appears, the diagnostic tool does not find the control unit, and the fault memory remains.

In this state, airbags and seatbelt pretensioners may not trigger in an emergency. The warning light points to the fault, so do not ignore the display.

Which vehicles is the BK2T-14B321-AC fitted in?

The BK2T-14B321-AC was fitted in these vehicles: Ford Transit Custom 1 (2012-2018) and 1 Facelift (2018-2023). What matters is the part number, not the model name alone.

The vehicles are listed here one below the other:

• Ford Transit Custom 1 (2012-2018)
• Ford Transit Custom 1 Facelift (2018-2023)

First check the part number on the label of the removed unit against this page; that shows whether it is the correct unit. Then have the fault memory read out, because only that record shows 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 1C1A-14B321-BB, BK2T-14B321-AE, BK2T-14B321-AG, DT1T-14B321-KE, GL2T-14B321-AC.

How does the repair of the BK2T-14B321-AC work?

First read out the fault memory and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Create a repair order online and send the unit in, packed well; processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is examined on the test bench. Defective components are replaced, stored crash data is erased and a function test is carried out. The repaired unit then comes 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 BK2T-14B321-AC get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair Airbag24 sends the control unit back by UPS.

The printed repair order goes into the parcel, and the unit must be packed shock-proof.