Airbag control unit with part number 51916488

What does the airbag control unit 51916488 do?

The airbag control unit 51916488 is the central control unit of the SRS restraint system in the Fiat vehicle. It evaluates the signals from the impact sensors, decides in a crash within milliseconds which airbags and seatbelt pretensioners to trigger, and monitors the system continuously. It reports faults via the airbag warning light.

During normal operation, the control unit checks the connected components continuously so that the system responds reliably in an emergency.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 51916488 fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered, because a normal diagnostic tool cannot erase it. Further causes are summarised below.

The unit creates crash data as soon as it registers an accident. A standard diagnostic tool cannot remove it, so the fault may persist even when the vehicle drives normally.

The further causes in detail:

• Aged electronic components, which can cause faults after prolonged use.
• Cold solder joints inside the unit.
• Moisture and corrosion at plug connections.
• Voltage spikes, for example from a weak battery or from jump-starting a vehicle.

How can you tell that the 51916488 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool cannot connect to the control unit, or the fault memory cannot be cleared.

The airbag warning light is the system's direct signal. It shows that something is wrong in the restraint system and should never be ignored in the instrument cluster.

In an emergency, airbags and seatbelt pretensioners may fail to trigger with such a defect. This also applies if the actual cause lies in a plug or cable.

Which vehicles is the 51916488 fitted in?

The airbag control unit 51916488 is fitted in these vehicles: Fiat Panda 169 (2003-2012).

You will find the suitable vehicles in this list:

• Fiat Panda 169 (2003-2012)

Compare the part number on the label of the removed unit with this page, as this only ensures that it is the correct unit. Have the fault memory read before removal. The log 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 46807549, 46807550, 51778261, 51778262, 51803610, 51803612.

How does the repair of the 51916488 work?

First have the fault memory read 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 well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and runs a function test. Afterwards, 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 51916488 get to Airbag24?

You send the control unit 51916488 in as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back by UPS.

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