Airbag control unit with part number DS7T-14B321-EA

What does the airbag control unit DS7T-14B321-EA do?

The airbag control unit DS7T-14B321-EA is the central control unit of the restraint system (SRS) for Ford. It evaluates the signals from the crash sensors and decides in an accident, within milliseconds, which airbags and seatbelt pretensioners are triggered.

While driving, the control unit monitors the entire system continuously. The evaluation therefore does not take place only in an emergency.

If it detects a fault, it displays this via the airbag warning light in the instrument cluster. After an accident it stores crash data and locks itself, which concerns the control unit itself.

Why does the control unit DS7T-14B321-EA fail?

The most common cause is stored crash data, even if no airbag was triggered. Further causes are ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from a weak battery or a jump start.

Stored crash data cannot be erased with a normal diagnostic tool. Airbag24 removes it during the repair, before the control unit is tested.

Ageing components and cold solder joints are typical weak points in the electronics. Moisture and corrosion attack the plug connections.

Voltage spikes from the vehicle electrical system can load the electronics and affect them. Whether one of these causes applies is shown only by the test on the test bench.

How can you tell that the DS7T-14B321-EA is defective?

A defect in the airbag control unit DS7T-14B321-EA shows up as the airbag warning light in the instrument cluster, as fault messages, as a diagnostic tool without connection to the control unit and as a fault memory that cannot be cleared.

Airbag warning light in the instrument cluster: it stays on permanently or comes on intermittently. The fault message in the instrument cluster and the missing contact to the diagnostic tool are further signs.

In an emergency, the airbags and seatbelt pretensioners may fail to trigger. Take these signs seriously and have the control unit checked promptly.

Which vehicles is the DS7T-14B321-EA fitted in?

The control unit DS7T-14B321-EA is fitted in these vehicles: Ford Mondeo 5 ’13 (2014-2019) and 5 ’13 Facelift (2019-2022).

The following vehicles are assigned to this part number:

• Ford Mondeo 5 ’13 (2014-2019)
• Ford Mondeo 5 ’13 Facelift (2019-2022)

Compare the part number on the label of the removed unit with this page; this only ensures that you have the correct unit. Also have the fault memory read out before you remove the unit. Only this result shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 1S7T-14B056, 1S7T-14B056-BG, 2184427, 285010733, DS7T-14B321-BB.

How does the repair of the DS7T-14B321-EA work?

First have the fault memory read out and enclose the log, then disconnect the battery and only then remove the control unit DS7T-14B321-EA. Then create a repair order online and send the unit in well packed. Processing at Airbag24 generally takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a functional test.

The 3–4 working days relate only to this work at Airbag24. Your own unit is then sent back.

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 DS7T-14B321-EA get to Airbag24?

You send the control unit DS7T-14B321-EA as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-resistant.