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

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

The airbag control unit 9L84-14B321-AJ controls the restraint system (SRS) of Ford. It evaluates the impact sensors, decides within milliseconds whether airbags and seatbelt pretensioners are ignited, and checks the system continuously.

Faults appear on the airbag warning light. After an accident it stores crash data and locks itself; only the repair lifts this lock.

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

Crash data from an accident is the most common cause for the 9L84-14B321-AJ, even if no airbag has deployed, because a standard diagnostic tool does not erase it. Ageing components, cold solder joints, moisture, corrosion and voltage spikes are additional possible causes.

These factors are invisible from outside, and their share in the failure cannot be determined without an examination.

Whether one of them caused the failure is only shown by reading out the fault memory, not by looking at the unit.

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

On the 9L84-14B321-AJ, a defect first becomes apparent on the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Error messages in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared are added to this.

Airbags and seatbelt pretensioners may then fail to deploy in an emergency. A prompt check is therefore advisable.

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

The 9L84-14B321-AJ is fitted in these vehicles: Ford Escape 2 (2008-2012).

The vehicle list for this part number:

• Ford Escape 2 (2008-2012)

Compare the part number on the label of the removed unit with this page beforehand. This only clarifies whether the correct unit is present. Have the fault memory read out as well, because only then does it become clear whether the control unit is defective or whether a plug or cable is responsible.

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-AK, 9L84-14B321-AL.

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

First you read out the fault memory and enclose the log, then disconnect the battery and remove the 9L84-14B321-AJ. Afterwards create a repair order online and send the packed unit.

Airbag24 tests the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Processing usually takes 3–4 working days.

Afterwards your own unit 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 9L84-14B321-AJ get to Airbag24?

You send the 9L84-14B321-AJ as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

The printed repair order is part of the parcel; pack the unit shockproof.