Airbag control unit with part number 8V4T-14B321-AG

What does the airbag control unit 8V4T-14B321-AG do?

The airbag control unit 8V4T-14B321-AG is the central control unit of the restraint system (SRS) for Ford. It evaluates the signals from the impact sensors and decides within milliseconds in the event of an accident which airbags and seatbelt pretensioners are triggered. It indicates faults via the airbag warning light.

The unit monitors the system continuously, that is, the sensors, wiring, airbags and seatbelt pretensioners, as well as its own power supply. If it finds a deviation, it creates an entry in the fault memory that a workshop can read out.

After an accident, it stores crash data and locks itself. This state is important for diagnosis and repair.

Why does the control unit 8V4T-14B321-AG fail?

The most common cause for the 8V4T-14B321-AG is crash data stored after an accident, even if no airbag has deployed. A standard diagnostic tool cannot be used to erase this data. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Electronic components age, and older solder joints can lose contact. Moisture and corrosion act mainly on the plug connections.

Voltage spikes occur, for example, with a weak battery or a jump start, and they add further strain to the electronics.

How can you tell that the 8V4T-14B321-AG is defective?

The airbag warning light in the instrument cluster stays on constantly or only intermittently. In addition, an error message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

These signs indicate that the system has detected a fault. The warning light is therefore not a minor matter but a direct message about the restraint system.

In an emergency, airbags and seatbelt pretensioners may then not trigger. A prompt check is therefore advisable.

Which vehicles is the 8V4T-14B321-AG fitted in?

The airbag control unit 8V4T-14B321-AG is fitted in these vehicles: Ford Kuga 1 ’08 (2008-2012).

The overview shows the vehicles on record for this part number.

• Ford Kuga 1 ’08 (2008-2012)

Compare the part number on the label of the removed unit with this page. This way you make sure that it is the right unit. Also have the fault memory read out before you send the unit in, because only this log 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 8V4T-14B321-AF, 9V4T-14B321-AA, 9V4T-14B321-AB.

How does the repair of the 8V4T-14B321-AG 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 a repair order and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench and replaces defective components. It then erases the stored crash data and carries out a function test before your own unit is sent 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 8V4T-14B321-AG get to Airbag24?

You send the control unit 8V4T-14B321-AG as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back to you by UPS.

Enclose the repair order in printed form and pack the unit shock-proof.