Airbag control unit with part number F1ET-14B321-AB

What does the airbag control unit F1ET-14B321-AB do?

The airbag control unit F1ET-14B321-AB controls the restraint system of Ford and evaluates the crash sensors. In a crash, it decides within milliseconds which airbags and seatbelt pretensioners trigger; in operation, it monitors the system and displays faults via the airbag warning light.

After a crash, the unit stores crash data and locks itself. The sensors, the wiring and the triggering elements belong to the system, which the control unit checks continuously.

Why does the control unit F1ET-14B321-AB fail?

Stored crash data is the most common cause of a failure with F1ET-14B321-AB, even if no airbag has deployed. A standard diagnostic tool does not erase it, but Airbag24 erases it during the repair.

Aged electronic components can also cause the failure, because circuits change over time.

Moisture and corrosion at plug connections disrupt the contact, and faulty solder joints lead to intermittent faults.

Voltage spikes, for example from a weak battery or from starting with external power, put additional strain on the electronics.

How can you tell that the F1ET-14B321-AB is defective?

A fault in the F1ET-14B321-AB shows up as the airbag warning light in the instrument cluster, which lights up constantly or intermittently. In addition, a fault message appears, the diagnostic tool cannot find the control unit, and the fault memory remains unchanged.

In an emergency, airbags and seatbelt pretensioners may then fail to deploy. The warning light calls for a prompt check, even if the car otherwise drives normally.

Which vehicles is the F1ET-14B321-AB fitted in?

The F1ET-14B321-AB is fitted in these vehicles: Ford Focus 3 ’11 (2010-2014) and 3 ’11 Facelift (2014-2018).

The overview shows which vehicles are listed for this part number:

• Ford Focus 3 ’11 (2010-2014)
• Ford Focus 3 ’11 Facelift (2014-2018)

Compare the part number on the label of the removed unit with this page. This only confirms that you have the right unit. Whether the control unit is defective or a plug or cable is the cause is shown only by the fault memory, which you should have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 285011993, BM5T-14B321-CE, CM5T-14B321-CA, DM5T 14B321 SA, F1ET-14B321-CB.

How does the repair of the F1ET-14B321-AB work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the F1ET-14B321-AB. Create a repair order online, pack the unit well and send it in. Processing at Airbag24 takes 3–4 working days.

Airbag24 examines the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. 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 F1ET-14B321-AB get to Airbag24?

You send the control unit F1ET-14B321-AB as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Pack the printed repair order into the parcel and pack the unit shock-proof.