Airbag control unit with part number JB3T-14B321-AD

What does the airbag control unit JB3T-14B321-AD do?

The airbag control unit JB3T-14B321-AD is the central control unit of the restraint system (SRS) of Ford. It evaluates the crash sensors and decides in an accident which airbags and seatbelt pretensioners are triggered.

During operation the unit monitors how all components work together. If it detects a fault, the airbag warning light in the instrument cluster displays it.

After an accident it stores crash data and locks itself. As a result, the unit is no longer in its original state for further use.

Why does the control unit JB3T-14B321-AD fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed, and a normal diagnostic tool cannot erase it. Besides that there are aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes, for example from a weak battery or a jump start.

The unit records crash data as soon as an impact is registered by the sensors. No airbag has to have deployed for this.

The other causes can develop over a longer period. Moisture attacks contacts, and aged components eventually work unreliably.

How can you tell that the JB3T-14B321-AD is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and a fault message appears in the instrument cluster. In addition, the diagnostic tool cannot establish a connection to the control unit, or the fault memory cannot be cleared.

Then airbags and seatbelt pretensioners may not trigger in an emergency. The light is a clear signal that you should follow up on.

Note when the light first appeared and whether it goes out after starting. This information helps with the diagnosis.

Which vehicles is the JB3T-14B321-AD fitted in?

According to our current data, this assignment applies to Ford. The control unit JB3T-14B321-AD is fitted in these vehicles: Ford Ranger 3 (2011-2015), 3 1st Facelift (2016-2019) and 3 2nd Facelift (2019-2023).

The list shows the vehicles that our data links to this part number.

• Ford Ranger 3 (2011-2015)
• Ford Ranger 3 1st Facelift (2016-2019)
• Ford Ranger 3 2nd Facelift (2019-2023)

Comparing the part number on the label of the removed unit with this page only establishes that it is the right unit, nothing more. Have the fault memory read out beforehand, because only that shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers AB3914B321CF, KB3T-14B321-BD.

How does the repair of the JB3T-14B321-AD work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Online you create the repair order and send the unit well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. 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 JB3T-14B321-AD get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. The return shipment after the repair is made by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.