Airbag control unit with part number FL1T-14B321-BB

What does the airbag control unit FL1T-14B321-BB do?

The airbag control unit FL1T-14B321-BB coordinates the triggering of airbags and seatbelt pretensioners in the restraint system (SRS) of Ford. To do this, it evaluates the crash sensors; after a crash, it locks itself.

The unit remains switched on during the entire journey and continuously checks whether the system is functional. It registers every fault and shows it via the airbag warning light.

Why does the control unit FL1T-14B321-BB fail?

The most common cause of the control unit FL1T-14B321-BB failing is stored crash data from an accident, even if no airbag was triggered. Aged components, cold solder joints, moisture and voltage spikes also come into consideration.

The crash data remain in memory after an accident. A normal diagnostic tool cannot erase them; the repair at Airbag24 is designed for this and removes them completely.

The other causes arise from ageing, contact with moisture or electrical peaks. Weak batteries and improper jump-starting in particular can cause voltage spikes.

How can you tell that the FL1T-14B321-BB is defective?

A defect in the FL1T-14B321-BB is shown by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Error messages, a missing contact with the diagnostic tool and a fault memory that cannot be cleared are further signs.

The warning light is the most noticeable sign for the driver in everyday use. It indicates a fault in the restraint system. In an emergency, airbags and seatbelt pretensioners may then fail to trigger, which is why a defect must be taken seriously.

A lost connection to the diagnostic tool also calls for an examination, because the condition of the system can then not be read.

Which vehicles is the FL1T-14B321-BB fitted in?

The control unit FL1T-14B321-BB is fitted in these vehicles: Ford Expedition 3 Facelift (2015-2017) and 1 UN93 (1997-2002).

The assignment to vehicles follows:

• Ford Expedition 3 Facelift (2015-2017)
• Ford Expedition 1 UN93 (1997-2002)

First compare the number on the removed unit with this page. This only establishes that the correct unit is in front of you. Then have the fault memory read out, because only this result 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 FL1T-14B321-AC, FL1Z-14B321-B, JL1T-14B321-BA, LL1T-14B321-AA, LL1T-14B321-BB.

How does the repair of the FL1T-14B321-BB work?

When repairing the FL1T-14B321-BB, read out the fault memory, attach the log and disconnect the battery before removing the control unit. Processing at Airbag24 generally takes 3–4 working days.

Then create a repair order online and send in the well-packed unit. Airbag24 checks it, repairs defective components, erases the crash data and carries out a function test; afterwards your own unit goes back to you.

The stated period refers only to checking, repairing and testing 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 FL1T-14B321-BB get to Airbag24?

You send the control unit FL1T-14B321-BB in as a parcel or arrange a UPS collection for an extra charge. Airbag24 returns the repaired unit by UPS.

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