Airbag control unit with part number 7L24-14B321-AD

What does the airbag control unit 7L24-14B321-AD do?

The airbag control unit 7L24-14B321-AD is the control unit of the restraint system (SRS) in Ford. It processes the signals from the crash sensors, selects the airbags and seatbelt pretensioners that should fire in an impact, and checks the system continuously. After an accident, it stores crash data and locks itself.

Faults that the unit detects end up in the fault memory. It is also connected to the airbag warning light so that you can see the fault.

Why does the control unit 7L24-14B321-AD fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. A normal diagnostic tool does not erase it. Further causes on the control unit 7L24-14B321-AD are ageing, soldering points, moisture and voltage spikes.

• Ageing electronic components
• Cold solder joints
• Moisture and corrosion on the plugs
• Voltage spikes, for example with a weak battery

Crash data shows the incident, but not yet the condition of the electronics. A test is needed for that.

How can you tell that the 7L24-14B321-AD is defective?

A defect shows up when the airbag warning light stays on permanently or intermittently. An error message, a diagnostic tool without connection or a fault memory that cannot be cleared also point to one. In an emergency, the airbags and seatbelt pretensioners may then not trigger.

The warning light is the most visible warning the system gives. A fault entry stays stored until it has been rectified, even if the engine was switched off in between.

If the connection to the diagnostic tool is disturbed, this does not necessarily lie with the control unit. Wiring, plugs and the power supply are also possible.

Which vehicles is the 7L24-14B321-AD fitted in?

The control unit 7L24-14B321-AD is fitted in these vehicles: Ford Explorer 4 U251 (2006-2010).

The vehicles for which this part number is recorded follow below. From them you can tell whether your vehicle is one of them.

• Ford Explorer 4 U251 (2006-2010)

Comparing the part number on the label with this page ensures that you have the right unit. It does not, however, answer the question of a defect. For that, read out the fault memory beforehand, because the log shows whether the control unit or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 6L24-14B321-AF, 6L24-14B321-CB, 6L24-14B321-GA, 7L24-14B321-CA, 7L24-14B321-DA, 9L24-14B321-DB.

How does the repair of the 7L24-14B321-AD work?

First, you read out the fault memory and attach the log. Then disconnect the battery and only afterwards remove the control unit 7L24-14B321-AD. Then create a repair order online and send the well packed unit in. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. Afterwards, your own unit is returned 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 7L24-14B321-AD get to Airbag24?

Whether you send the unit 7L24-14B321-AD yourself as a parcel or book a UPS collection for an extra charge is up to you. After the repair, Airbag24 returns it by UPS.

The printed repair order goes into the parcel. Pack the control unit shock-proof so that it arrives undamaged.