Airbag control unit with part number YF1Z-14B321-AB

What does the airbag control unit YF1Z-14B321-AB do?

The airbag control unit YF1Z-14B321-AB handles the control of the restraint system (SRS) for Ford. Using the signals from the crash sensors, it determines which airbags and seatbelt pretensioners trigger in an accident, within a few milliseconds. After an accident, it stores crash data and locks itself.

The unit reports faults via the airbag warning light in the instrument cluster. It monitors the system continuously, and only a repair of the unit lifts the lock after an accident.

Why does the control unit YF1Z-14B321-AB fail?

Most common cause: crash data stored after an accident, although no airbag fired. On the YF1Z-14B321-AB, a normal diagnostic tool cannot remove it. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

The crash data remains in memory until Airbag24 removes it during the repair. Whether electronics, a plug connection or the power supply is behind the fault in an individual case only becomes clear during the inspection.

How can you tell that the YF1Z-14B321-AB is defective?

A defect in the YF1Z-14B321-AB becomes visible through the airbag warning light in the instrument cluster, which stays on permanently or intermittently. Then the airbags and seatbelt pretensioners may not trigger in an emergency. A missing connection to the diagnostic tool or a fault memory that cannot be cleared also indicate a defect.

Pay attention to these signs in particular:

• airbag warning light in the instrument cluster that is on constantly or now and then
• error message in the instrument cluster
• diagnostic tool without connection to the control unit
• fault memory that cannot be cleared

The light is there to indicate faults. Have it checked promptly rather than waiting.

Which vehicles is the YF1Z-14B321-AB fitted in?

The airbag control unit YF1Z-14B321-AB is fitted in these vehicles: Ford Taurus 4 (2000-2007). The label on the removed unit is ultimately decisive.

Here is the list of vehicles recorded for this part number.

• Ford Taurus 4 (2000-2007)

(a) Compare the number on the unit with this page. This only confirms that it is the correct control unit. (b) Have the fault memory read out beforehand, because the result shows whether the control unit itself is the cause or whether a plug or cable is involved.

For the same vehicles, we also repair control units with the part numbers 1F1Z-14B321-AA, 2F1Z-14B321-AA, 3F1Z-14B321-CA, 4F13-14B321-AF, 4F1Z-14B321-AA, 5F13-14B321-AB.

How does the repair of the YF1Z-14B321-AB work?

The first step is reading out the fault memory, whose log you enclose; then disconnect the battery and remove the YF1Z-14B321-AB. Next, create the repair order online and send the unit in. At Airbag24, you should allow 3–4 working days for the work on the unit.

Airbag24 inspects the unit on the test bench, repairs defective components and erases the stored crash data; a function test follows. After that, your own unit is returned 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 YF1Z-14B321-AB get to Airbag24?

You send a parcel with the control unit YF1Z-14B321-AB yourself to Airbag24, or book a UPS collection for an extra charge. The return after the repair is made by UPS.

Put the printed repair order into the parcel and pack the unit shock-resistant.