Airbag control unit with part number 8V59-14B321-BA

What does the airbag control unit 8V59-14B321-BA do?

The airbag control unit 8V59-14B321-BA controls the restraint system (SRS) of Ford. It checks the signals from the crash sensors and decides within a fraction of a second in the event of an accident which airbags and seatbelt pretensioners are triggered. It also monitors the system continuously and shows faults via the airbag warning light.

Deciding when to trigger is the core of the work, but not its only task. In everyday driving, the monitoring runs in the background and stays invisible to the driver for as long as everything is in order.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 8V59-14B321-BA fail?

The most common causes are crash data stored after an accident, even if no airbag has been triggered. Other causes can be aged components, cold solder joints, moisture, corrosion and voltage spikes. With this control unit, the crash data often cannot be deleted. If you would like the crash data deleted, get in touch with Airbag24 briefly before sending the unit in.

Crash data remains stored in the unit after an accident, even if no airbag has been triggered. The other causes concern the electronics and the connections: components age, solder joints can go cold, and moisture or corrosion at plug connections disrupts contact. Voltage spikes, for example from a weak battery or a jump start, can also affect the unit.

How can you tell that the 8V59-14B321-BA is defective?

The airbag warning light in the instrument cluster lights up continuously or intermittently as soon as a fault is present in the system. Also present are a fault message in the instrument cluster, a diagnostic tool without a connection to the control unit, and a fault memory that cannot be deleted.

With such a finding, the airbags and seatbelt pretensioners may not trigger in an emergency. Take the warning seriously and have the system checked.

Which vehicles is the 8V59-14B321-BA fitted in?

The control unit 8V59-14B321-BA is fitted in these vehicles: Ford Fiesta 7 ’09 (2008-2017). To check whether your own unit is one of them, compare the part number on the label.

The following vehicles are listed individually:

• Ford Fiesta 7 ’09 (2008-2017)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. Before removing anything, have the fault memory read out, as only that shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers AA6T-14B321-CA, AA6T-14B321-EA, AA6T-14B321-FA, AE83-14B321-AD, AE83-14B321-AE, AE83-14B321-AF.

How does the repair of the 8V59-14B321-BA work?

First, have the fault memory read out and enclose the log, then disconnect the battery before removing the control unit. Next, create a repair order online and pack the unit well for sending.

Airbag24 checks the unit on the test bench and repairs defective components. A function test follows, and your own unit is then returned to you. Processing at Airbag24 usually takes 3–4 working days. If you would like the crash data deleted, get in touch with Airbag24 briefly before sending the unit in.

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 8V59-14B321-BA get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.