Airbag control unit with part number CL3Z-14B321-A

What does the airbag control unit CL3Z-14B321-A do?

The airbag control unit CL3Z-14B321-A is the central control unit of the restraint system (SRS) for Ford. It processes the signals from the crash sensors, decides within milliseconds in an impact whether to trigger the airbags and seatbelt pretensioners, and monitors the system at all times. After an accident it stores crash data and locks itself.

If the system reports a fault, the airbag warning light in the instrument cluster displays it.

The unit therefore takes on a central task in the vehicle.

Why does the control unit CL3Z-14B321-A fail?

The most common cause with the CL3Z-14B321-A is stored crash data after an accident, even without a triggered airbag. A normal diagnostic tool cannot erase it. Added to this are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example with a weak battery or jump-starting.

Crash data belongs to the memory of the control unit; whether an airbag has triggered plays no role for it.

A problem in the plug or in the cable can show the same symptoms as a fault in the unit.

How can you tell that the CL3Z-14B321-A is defective?

A defect in the CL3Z-14B321-A can be recognised by the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Fault messages in the instrument cluster, no contact to the diagnostic tool and a fault memory that cannot be cleared also indicate it.

• Airbag warning light, lit permanently or intermittently
• Fault message in the instrument cluster
• No contact between the diagnostic tool and the control unit
• Fault memory that cannot be cleared

In an emergency, the airbags and seatbelt pretensioners may not be able to deploy after such a finding. Do not wait, but have the system checked.

Which vehicles is the CL3Z-14B321-A fitted in?

The CL3Z-14B321-A is fitted in these vehicles: Ford F-150 12th generation (2009-2014). The list follows the assignment to this part number.

Here is the assignment in detail:

• Ford F-150 12th generation (2009-2014)

Comparing the part number on the label of the removed unit with this page only shows that you have the right unit. The fault memory, by contrast, reveals whether the control unit is defective or whether a plug or cable is the cause. That is why you should have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 9L34-14B321-EK, CL34-14B321-AB, CL34-14B321-BB, CL3Z-14B321-B, DL34-14B321-BC.

How does the repair of the CL3Z-14B321-A work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only afterwards remove the CL3Z-14B321-A. Next, create a repair order online and send the well-packed unit in. Airbag24 checks it, repairs defective components, carries out a function test, and the unit goes back to you.

For checking, repair and testing, Airbag24 needs 3–4 working days as a rule.

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 CL3Z-14B321-A get to Airbag24?

You send the CL3Z-14B321-A to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Enclose the printed repair order with the parcel and pack the unit shock-resistant.