Airbag control unit with part number AS7T-14B321-AC

What does the airbag control unit AS7T-14B321-AC do?

The airbag control unit AS7T-14B321-AC coordinates the restraint system (SRS) in the vehicle of Ford. It evaluates what the crash sensors report and determines in an impact which airbags and seatbelt pretensioners are triggered. It also monitors the system continuously.

A fault is shown via the airbag warning light in the instrument cluster. To do this, the unit runs its test routines during operation.

After an accident, it stores crash data and locks itself afterwards.

Why does the control unit AS7T-14B321-AC fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. A normal diagnostic tool cannot erase it. Further possible causes are ageing components, cold solder joints, moisture on connectors and voltage spikes.

The memory holds the crash data even when the vehicle shows no external damage. A standard tool cannot erase it in this case. Airbag24 removes the data during the repair of the AS7T-14B321-AC.

Electronics change over the years, solder joints can develop hairline cracks, and moisture makes contacts corrode. Voltage spikes arise, for example, when the battery is weak or the vehicle is jump-started. Airbag24 also checks these other components.

How can you tell that the AS7T-14B321-AC is defective?

A defect shows up as the airbag warning light, which stays on permanently or intermittently, and as a fault message in the instrument cluster. In addition, no connection to the diagnostic tool can be established, and the fault memory cannot be cleared.

These signs indicate that the restraint system is faulty. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The important point is that the lamp reports the defect on its own. You do not need to measure anything; simply watch the display.

Which vehicles is the AS7T-14B321-AC fitted in?

The control unit AS7T-14B321-AC is fitted in these vehicles: Ford Mondeo 4 ’07 Facelift (2010-2014).

The following list shows the vehicles recorded for this part number.

• Ford Mondeo 4 ’07 Facelift (2010-2014)

Also compare the part number on the label of your removed unit with this page. This only confirms that you have the correct unit.

Have the fault memory read out beforehand without fail. Only this result shows whether the control unit is defective or whether a connector or cable is responsible for the fault.

For the same vehicles, we also repair control units with the part numbers 285010228, 670013905702, 7S7T-14B056-AC, 7S7T-14B056-AD.

How does the repair of the AS7T-14B321-AC work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send the unit in well packed.

At Airbag24, the unit is checked on the test bench. Defective components are replaced, stored crash data is deleted and a function test is carried out.

Processing there usually takes 3–4 working days. Your own unit then comes 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 AS7T-14B321-AC get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends the control unit AS7T-14B321-AC back to you by UPS.

Enclose the printed repair order in the parcel. The unit must be packed shockproof.