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

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

The control unit 9M5T-14B321-CA controls the restraint system (SRS) of Ford. It checks the signals from the crash sensors, determines in an accident which airbags and seatbelt pretensioners trigger, and monitors the system without interruption. After an accident it stores crash data and locks itself.

It detects faults itself and shows them via the airbag warning light in the instrument cluster.

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

Most often the cause is stored crash data: it arises after an accident even if no airbag has triggered, and an ordinary diagnostic tool cannot delete it. Airbag24 deletes it during the repair. Other causes are ageing electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Voltage spikes occur with a weak battery or when starting with a jump start, and they stress the electronics.

Which of these possibilities applies in the individual case only becomes clear once the unit has been examined.

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

If the airbag warning light in the instrument cluster lights up, whether constantly or only now and then, a defect is likely. At the same time an error message may appear in the instrument cluster, or the diagnostic tool finds no contact with the control unit. In this case airbags and seatbelt pretensioners may possibly fail to deploy in an emergency.

A fault memory that cannot be emptied is likewise a sign of a fault.

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

This 9M5T-14B321-CA is fitted in the following vehicles: Ford Focus 2 ’04 (2004-2007) and 2 ’04 Facelift (2004-2007); Ford C-Max 1 Facelift (2007-2010) and 1 (2003-2007).

The vehicles in which this control unit is installed are listed here:

• Ford Focus 2 ’04 (2004-2007)
• Ford Focus 2 ’04 Facelift (2004-2007)
• Ford C-Max 1 Facelift (2007-2010)
• Ford C-Max 1 (2003-2007)

On the one hand, comparing the number on the label helps you identify the right unit. On the other hand, only the fault memory shows whether the control unit is defective or whether a plug or cable is affected, so 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, 3M5T-14B056-BG, 4M5T 14B056 AE, 4M5T-14B056-BJ.

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

Right at the start, have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Testing, repair and functional check at Airbag24 usually take 3–4 working days.

Online you create the repair order and send the unit well packed. At Airbag24 it is checked on the test bench, defective components are replaced, stored crash data is deleted and a functional test is carried out. The unit then 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 9M5T-14B321-CA get to Airbag24?

A parcel is sufficient, or you book a UPS collection for an extra charge. UPS handles the return after the repair.

The printed repair order must not be missing from the parcel; pad the unit against vibration.