Airbag control unit with part number GK3T-14B321-BC

What does the airbag control unit GK3T-14B321-BC do?

The airbag control unit GK3T-14B321-BC is the central processing unit of the SRS system of Ford. It processes the readings from the crash sensors, determines which airbags and seatbelt pretensioners to trigger in an impact, and checks the entire system during operation.

If the unit detects a fault, it switches on the airbag warning light in the instrument cluster. This makes a problem visible immediately.

After an accident the control unit creates crash data and then locks itself.

Why does the control unit GK3T-14B321-BC fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed; a standard diagnostic tool cannot delete it. Further triggers are ageing components, cold solder joints, moisture or corrosion on plug connectors and voltage spikes.

For a fault, the following causes are also possible:

• ageing electronic components
• cold solder joints on the circuit board
• moisture and corrosion on plug connectors
• voltage spikes, for example with a weak battery or jump-starting

Airbag24 deletes the stored crash data during the repair.

How can you tell that the GK3T-14B321-BC is defective?

Typical signs are an airbag warning light in the instrument cluster that stays on permanently or intermittently, an error message in the instrument cluster, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be cleared.

The warning light indicates the fault, but in such a case airbags and seatbelt pretensioners may not deploy in an emergency. That is exactly why it is worth glancing at the instrument cluster after every journey in which something seems unusual.

Which vehicles is the GK3T-14B321-BC fitted in?

The control unit GK3T-14B321-BC is fitted in these vehicles: Ford Transit 7 ’14 (from 2014).

The following vehicles are known for this part number.

• Ford Transit 7 ’14 (from 2014)

Two steps serve as a safeguard before removal. Check the part number on the label of the removed unit against this page so you know for certain that it is the right unit. Also have the fault memory read out, because only the log shows whether the control unit itself 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 GK3T-14B321-BC work?

First have the fault memory read out and enclose the log; then disconnect the battery and only then remove the control unit. Then create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is checked on the test bench, defective components are repaired, the crash data is deleted and a function test is carried out. Only after that is your own unit returned.

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 GK3T-14B321-BC get to Airbag24?

Either you send the unit in 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 with the parcel. Pack the control unit shock-proof.