Airbag control unit with part number GN15-14B321-BB

What does the airbag control unit GN15-14B321-BB do?

The airbag control unit GN15-14B321-BB is the control centre of the restraint system (SRS) of Ford. It evaluates the signals from the crash sensors, decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster.

It is therefore more than one component among many, because its function decides how all restraint devices work together.

Why does the control unit GN15-14B321-BB fail?

The most common cause lies in crash data left behind by an accident, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from weak batteries or jump-starting, can also cause the failure. Airbag24 erases the crash data during repair.

Crash data is a record, not a finding about the component itself. It shows that the unit has registered an event.

The other causes concern the electronics and their connections. Plug connections are particularly sensitive, because moisture and corrosion spread slowly there.

How can you tell that the GN15-14B321-BB is defective?

A defect shows itself above all through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition there are error messages, a missing connection to the diagnostic tool and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not deploy.

The signs in detail:

• airbag warning light, permanently or intermittently
• error message in the instrument cluster
• diagnostic tool without a connection to the control unit
• fault memory that cannot be cleared

Such signs are worth a check, even if the vehicle otherwise runs normally. The light signals a problem in the restraint system, regardless of how the vehicle is driven.

Which vehicles is the GN15-14B321-BB fitted in?

The airbag control unit GN15-14B321-BB is fitted in these vehicles: Ford EcoSport 2 (2012-2015) and 2 Facelift (2015-2022).

The following vehicles are stored for this number:

• Ford EcoSport 2 (2012-2015)
• Ford EcoSport 2 Facelift (2015-2022)

Compare the part number on the label of the removed unit with this page, so that you can be sure you have the right unit in front of you. Also have the fault memory read out beforehand, because the log 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 CN15-14B321-AC, CN15-14B321-AD, CN15-14B321-AE, CN15-14B321-AF, CN15-14B321-BC, CN15-14B321-BD.

How does the repair of the GN15-14B321-BB work?

First have the fault memory read out and enclose the log with the unit. Then disconnect the battery before you remove the control unit. Afterwards you create a repair order online and send the unit in well packed.

Airbag24 tests the unit on the test bench, replaces defective components, erases the stored crash data and carries out a function test. The processing time is usually 3–4 working days.

Afterwards your own unit 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 GN15-14B321-BB get to Airbag24?

A parcel, or a UPS collection booked for an extra charge, brings the unit to Airbag24. The return to you is made by UPS.

A shock-resistant box is suitable for transport, and the printed repair order belongs in it too.