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

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

The airbag control unit GN15-14B321-BJ is the control unit of the restraint system (SRS) for Ford. It continuously evaluates the crash sensors, decides in an impact about airbags and seatbelt pretensioners, and monitors the entire restraint system. It reports faults via the airbag warning light.

After an accident the unit stores crash data and locks itself. The instrument cluster serves as its display; it has no operation of its own.

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

Crash data stored in the unit after an accident is most often the cause, even if no airbag fired. A normal diagnostic tool does not delete it. Otherwise aged electronics, cold solder joints, moisture and corrosion at plugs, as well as voltage spikes, come into question.

The crash data remains in the memory until it is removed during the repair. The other factors depend strongly on the individual case and do not follow a fixed pattern.

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

A defect shows itself through the airbag warning light, an error message, a missing connection to the diagnostic tool, or a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The signs in detail:

• Airbag warning light in the instrument cluster, permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

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

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

Here follows the overview:

• Ford EcoSport 2 Facelift (2015-2022)

Compare the part number on the label of the removed unit with this page; this only confirms that it is the correct unit. Also have the fault memory read out beforehand. Only the log shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers DN1T-14B321-EC, GN15-14B321-AF, GN15-14B321-GJ, GN1Z-14B321-AE, GN1Z-14B321-AK.

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

First read out the fault memory and enclose the log, then disconnect the battery and remove the control unit GN15-14B321-BJ. Then create a repair order online and send the unit in well packed. Airbag24 checks it on the test bench, replaces defective components, deletes stored crash data and carries out a function test; this generally takes 3–4 working days.

The 3–4 working days refer exclusively to the work at Airbag24.

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-BJ get to Airbag24?

Either you send the GN15-14B321-BJ to Airbag24 as a parcel, or you have it collected by UPS for an extra charge. The return after the repair also runs via UPS.

The printed repair order and a shock-resistant cover for the unit belong in the parcel.