Airbag control unit with part number 7S7T-14B056-BC

What does the airbag control unit 7S7T-14B056-BC do?

The 7S7T-14B056-BC is the airbag control unit of Ford and controls the restraint system (SRS). It evaluates signals from the impact sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

It also monitors the system continuously and shows faults via the airbag warning light.

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

Why does the control unit 7S7T-14B056-BC fail?

The most common cause with the control unit 7S7T-14B056-BC is crash data that was stored after an accident, even though no airbag was triggered. A normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion, and voltage spikes.

These further causes come into consideration:

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

Which cause actually applies is only shown by examining the unit.

How can you tell that the 7S7T-14B056-BC is defective?

A defect in the 7S7T-14B056-BC shows up at the airbag warning light, which stays on permanently or intermittently, and as a fault message in the instrument cluster. Even if the diagnostic tool cannot establish a connection to the control unit, or the fault memory cannot be cleared, that is a sign. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

These signs go together and point to a problem in the system. Where exactly it lies is shown only by reading out the system.

Which vehicles is the 7S7T-14B056-BC fitted in?

A vehicle list exists for this part number 7S7T-14B056-BC. The control unit is fitted in these vehicles: Ford Mondeo 4 ’07 (2007-2010) and 4 ’07 Facelift (2010-2014).

The vehicles for this number in detail:

• Ford Mondeo 4 ’07 (2007-2010)
• Ford Mondeo 4 ’07 Facelift (2010-2014)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Whether the control unit is defective is shown only by the fault memory after reading out, because plugs and cables also come into consideration as causes. So have it read out beforehand.

For the same vehicles, we also repair control units with the part numbers 285010228, 7S7T-14B056-AC, 7S7T-14B056-AD, AS7T-14B321-AC, AS7T-14B321-BA, AS7T-14B321-BB.

How does the repair of the 7S7T-14B056-BC work?

For the 7S7T-14B056-BC, first read out the fault memory and attach the log. Then disconnect the battery and remove the control unit. Next, create the repair order online and send the well-packed unit. At Airbag24, processing usually takes 3–4 working days.

Airbag24 checks the control unit on the test bench, repairs defective components, erases the stored 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 7S7T-14B056-BC get to Airbag24?

You send the control unit 7S7T-14B056-BC as a parcel or book a UPS collection for an extra charge. After the repair, UPS brings your own unit back from Airbag24.

Include the printed repair order with the parcel and pack the unit shock-proof.