Airbag control unit with part number 51747601

What does the airbag control unit 51747601 do?

The airbag control unit 51747601 is the central control unit of the restraint system (SRS) in Fiat. It evaluates the signals from the crash sensors, decides within milliseconds in the event of an accident whether airbags and seatbelt pretensioners are triggered, and monitors the system permanently. After an accident it stores crash data and locks itself.

The unit shows faults via the airbag warning light in the instrument cluster. That light is therefore the first sign you will notice in everyday use.

Crash data is created when the control unit registers an accident. It remains stored in the unit.

Why does the control unit 51747601 fail?

Stored crash data from a previous accident is the most common cause of a fault in control unit 51747601, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

A normal diagnostic tool cannot erase crash data. At Airbag24 the data is erased as part of the repair.

The other causes concern the electronics and their connections. Voltage spikes occur, for example, with a weak battery or when jump-starting, while moisture and corrosion disrupt contact at plugs.

How can you tell that the 51747601 is defective?

A defect in the 51747601 shows up as an airbag warning light in the instrument cluster that lights up permanently or intermittently. Other signs are a fault message in the instrument cluster, a diagnostic tool without connection to the control unit, and a fault memory that cannot be cleared.

In the event of a defect, airbags and seatbelt pretensioners may not be able to deploy when needed. The warning light shows the defect, so it should be checked promptly.

Which vehicles is the 51747601 fitted in?

You can check whether your car is one of the models by looking at the vehicle registration document. The airbag control unit 51747601 is fitted in these vehicles: Fiat Punto 199 (2005-2018).

The following list shows the vehicles for which we have data on this control unit.

• Fiat Punto 199 (2005-2018)

Comparing the part number on the label of the removed unit with this page only confirms that you have the right unit. Have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 391035, 391156, 51719091, 51719092, 51719094, 51754872.

How does the repair of the 51747601 work?

First, the fault memory is read out and the log is enclosed; only after that do you disconnect the battery and remove the control unit 51747601. Then you create a repair order online and send in the well-packed unit. At Airbag24 processing usually takes 3–4 working days.

Airbag24 checks the unit on the test bench. Defective components are replaced, stored crash data is erased, and a function test follows. 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 51747601 get to Airbag24?

You send the unit as a parcel to Airbag24, or you book a UPS collection for an extra charge. After the repair your own unit is returned to you by UPS.

The printed repair order goes into the parcel. Pack the control unit shockproof so that it arrives undamaged.