Airbag control unit with part number MK2T-14B321-DA

What does the airbag control unit MK2T-14B321-DA do?

The airbag control unit MK2T-14B321-DA controls the SRS restraint system of Ford. It evaluates the signals from the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered.

It also monitors the system continuously and shows faults via the airbag warning light in the instrument cluster.

After an accident the unit stores crash data and locks itself. Only the repair lifts the lock.

Why does the control unit MK2T-14B321-DA fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

A normal diagnostic tool cannot remove this crash data. At Airbag24 it is deleted during the repair.

A weak battery or jump-starting can cause voltage spikes that stress the unit.

How can you tell that the MK2T-14B321-DA is defective?

The airbag warning light in the instrument cluster lights up permanently or only intermittently. In addition there is a fault message, no contact between the diagnostic tool and the control unit, and a fault memory that cannot be emptied.

In an emergency, airbags and seatbelt pretensioners may then not trigger. The light should therefore be taken seriously.

Faults that occur intermittently are also stored, which is why reading out the memory provides clarity even then.

Which vehicles is the MK2T-14B321-DA fitted in?

This overview is only a guide. The airbag control unit MK2T-14B321-DA is fitted in these vehicles: Ford Tourneo Custom 1 Facelift (2018-2023) and 1 (2012-2018); Ford Transit Custom 1 (2012-2018) and 1 Facelift (2018-2023).

The following vehicles are recorded in our data:

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

First compare the part number on the label of the removed unit with this page; this only confirms that it is the correct unit. Then have the fault memory read out, because only this result shows whether the control unit is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers BK2T-14B321-AC, BK2T-14B321-AE, BK2T-14B321-AG, BK2T-14B321-BE, BK2T-14B321-BF, BK2T-14B321-BG.

How does the repair of the MK2T-14B321-DA work?

The first step is reading out the fault memory, whose log you attach. Then disconnect the battery and only afterwards remove the control unit. Next create the repair order online and send in the well-packed unit. Airbag24 tests it on the test bench, repairs defective components, deletes the stored crash data and carries out a function test.

This sequence must be observed for safety reasons.

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 MK2T-14B321-DA get to Airbag24?

The unit goes to Airbag24 as a parcel, or alternatively you book a UPS collection for an extra charge. After the repair Airbag24 sends it back by UPS.

The printed repair order belongs in the parcel; pack the unit shock-resistant.