Airbag control unit with part number 9M5T-14B321-BB

What does the airbag control unit 9M5T-14B321-BB do?

The airbag control unit 9M5T-14B321-BB controls the restraint system (SRS) of Ford. In a crash it calculates from the sensor signals within milliseconds which airbags and seatbelt pretensioners are to be triggered.

It monitors the system continuously and indicates faults via the airbag warning light. After an accident it stores crash data and locks itself.

Why does the control unit 9M5T-14B321-BB fail?

The most common cause is stored crash data after an accident, even without a deployed airbag. Other causes include aged electronics, cold solder joints, moisture and corrosion on connectors, and voltage spikes.

Crash data cannot be deleted with a normal diagnostic tool. Airbag24 deletes it during the repair.

Electronic components change over the years, solder joints can become cold, and moisture attacks plug contacts.

Voltage spikes occur, for example, with a weak battery or when jump-starting.

How can you tell that the 9M5T-14B321-BB is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently as soon as a defect is present. This can include an error message in the instrument cluster, 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 trigger.

A short self-test when the ignition is switched on is normal. If the light stays on afterwards, there is a problem.

Which vehicles is the 9M5T-14B321-BB fitted in?

You carry out the comparison of part number 9M5T-14B321-BB with this page. The control unit is fitted in these vehicles: Ford Focus 2 ’04 (2004-2007) and 2 ’04 Facelift (2004-2007).

The list shows the vehicles that are stored for this number.

• Ford Focus 2 ’04 (2004-2007)
• Ford Focus 2 ’04 Facelift (2004-2007)

The label comparison only confirms that you have the correct device in front of you. For the cause you need the fault memory: only it shows whether the control unit is defective or whether a plug or cable is affected, which is why you should have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 285001552, 2M5T-14B056-BD, 2M5T-14B056-DE, 4M5T-14B056-BJ, 8M5T-14B321-BD, 9M5T-14B321-BA.

How does the repair of the 9M5T-14B321-BB work?

Have the fault memory read out first and the log enclosed. Then disconnect the battery and only then remove the control unit. Afterwards you create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes crash data and carries out a function test. Normally 3–4 working days are planned for this; afterwards your own unit is 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 9M5T-14B321-BB get to Airbag24?

For shipping you use a parcel or book a UPS collection for an extra charge. The return is by UPS as soon as the repair is complete.

The printed repair order goes into the parcel; the control unit must be packed shockproof.