Airbag control unit with part number 8L84-14B321-AK

What does the airbag control unit 8L84-14B321-AK do?

The 8L84-14B321-AK is the airbag control unit of the restraint system (SRS) for Ford. It processes the signals from the crash sensors, decides in the event of an impact within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

After an accident it stores crash data and remains locked afterwards. Reported faults appear via the airbag warning light in the instrument cluster.

Why does the control unit 8L84-14B321-AK fail?

Crash data stored after an accident is the most common cause, even if no airbag has deployed. A standard diagnostic tool does not erase it; Airbag24 removes it during the repair. Ageing components, cold solder joints, moisture and corrosion at connectors and voltage spikes are also possible causes.

Crash data remains in the unit after the event. Which of the other causes applies cannot be said without examination.

How can you tell that the 8L84-14B321-AK is defective?

A defect shows up in the airbag warning light, when it lights up permanently or intermittently, in error messages in the instrument cluster, in a lack of connection to the diagnostic tool, and in a fault memory that cannot be cleared. In these cases have the unit checked.

The warning light is the indication the vehicle itself gives. Airbags and seatbelt pretensioners may not deploy in an emergency if the system is faulty.

Which vehicles is the 8L84-14B321-AK fitted in?

First check whether your vehicle matches the details. The 8L84-14B321-AK is fitted in these vehicles: Ford Escape 2 (2008-2012).

The vehicles for which this part number is stored are shown in the following list:

• Ford Escape 2 (2008-2012)

Comparing the part number on the label with this page confirms that you have the correct unit. Only the fault memory shows whether the control unit or a plug or cable is causing the fault, so have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 8L84-14B321-AG, 8L84-14B321-AH, 8L84-14B321-AJ, 9L84-14B321-AJ, 9L84-14B321-AK, 9L84-14B321-AL.

How does the repair of the 8L84-14B321-AK work?

First have the fault memory read out, disconnect the battery and then remove the 8L84-14B321-AK. Then create a repair order online and send in the unit. Airbag24 needs 3–4 working days as a rule for processing.

Airbag24 checks the unit on the test bench, replaces defective components, deletes the crash data and carries out a functional test. Your own unit is then sent back.

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 8L84-14B321-AK get to Airbag24?

You send the 8L84-14B321-AK as a parcel or book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

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