Airbag control unit with part number 9L84-14B321-AK

What does the airbag control unit 9L84-14B321-AK do?

The airbag control unit 9L84-14B321-AK is the central control unit of the restraint system (SRS) for Ford. It evaluates the signals from the crash sensors and, in the event of an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition, the unit continuously monitors the entire chain of sensors, wiring and triggers. If it detects a fault, it reports it via the airbag warning light in the instrument cluster.

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

Why does the control unit 9L84-14B321-AK fail?

The most common cause is stored crash data from an accident, even if no airbag was triggered. Other possible causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Crash data cannot be erased with a standard diagnostic tool. Airbag24 removes it during the repair.

The remaining causes concern the electronics themselves and their connections. Aged components and cold solder joints act directly inside the unit, while moisture attacks the contacts.

How can you tell that the 9L84-14B321-AK is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition there may be an error message, a diagnostic tool with no connection to the control unit, or a fault memory that cannot be cleared. In such cases the airbags and seatbelt pretensioners may not trigger in an emergency.

The warning light is the most visible sign, because the control unit reports the fault as soon as it has detected it. You therefore learn directly when something is wrong.

No connection to the diagnostic tool does not automatically mean that the control unit itself is affected. Plugs and cables are equally possible causes.

Which vehicles is the 9L84-14B321-AK fitted in?

The control unit 9L84-14B321-AK is fitted in these vehicles: Ford Escape 2 (2008-2012). The assignment applies to the vehicles listed.

The list shows the models assigned to this part number.

• Ford Escape 2 (2008-2012)

On the one hand, it is worth comparing the part number on the label of the removed unit with this page, so that you can be sure it is the right unit. On the other hand, have the fault memory read out beforehand. 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 8L84-14B321-AG, 8L84-14B321-AH, 8L84-14B321-AJ, 8L84-14B321-AK, 9L84-14B321-AJ, 9L84-14B321-AL.

How does the repair of the 9L84-14B321-AK work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit 9L84-14B321-AK. Afterwards create the repair order online and pack the unit carefully. Processing at Airbag24 usually takes 3–4 working days.

The sequence serves safety: the readout records the condition, and only with the battery disconnected is removal safe.

At Airbag24 the unit is checked on the test bench, defective components are repaired, crash data is erased and a function test is carried out. Afterwards your own unit is returned.

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 9L84-14B321-AK get to Airbag24?

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

Place the printed repair order in the parcel and pack the unit shock-proof.