Airbag control unit with part number 46862957

What does the airbag control unit 46862957 do?

The airbag control unit 46862957 is the central control unit of the restraint system for Fiat and Opel. It checks the signals from the crash sensors, decides in an accident within milliseconds about airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

In the vehicle it reports faults via the airbag warning light.

The crash data document how the accident proceeded.

Why does the control unit 46862957 fail?

The most common cause is crash data stored after an accident, even if no airbag deploys; they cannot be deleted with a normal diagnostic tool. Ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes can also be causes.

Crash data are created in the unit itself, regardless of whether airbags actually fire.

The other causes mainly affect the electronics. Components age, solder joints can go cold, and moisture attacks contacts.

Voltage spikes, for example with a weak battery or when connecting a jump start, can additionally load the circuits.

How can you tell that the 46862957 is defective?

A fault shows up via the display in the instrument cluster and via the diagnostic tool. The airbag warning light is lit permanently or intermittently, and the fault memory cannot be cleared. In an emergency the airbags and seatbelt pretensioners may then fail to trigger.

The following signs indicate this:

• Airbag warning light in the instrument cluster, permanently or intermittently
• Fault message in the instrument cluster
• No connection from the diagnostic tool to the control unit
• Fault memory cannot be cleared

Each of these points is a reason for an inspection.

Which vehicles is the 46862957 fitted in?

The 46862957 is fitted in these vehicles: Fiat Ducato 250 2nd Facelift (2014-2024), 250 (2006-2011), 250 3rd Facelift (from 2023) and 250 1st Facelift (2011-2014); Opel Movano C (from 2021). If your model is listed there, the unit is intended for your car.

Here are the vehicles in detail:

• Fiat Ducato 250 2nd Facelift (2014-2024)
• Fiat Ducato 250 (2006-2011)
• Opel Movano C (from 2021)
• Fiat Ducato 250 3rd Facelift (from 2023)
• Fiat Ducato 250 1st Facelift (2011-2014)

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

For the same vehicles, we also repair control units with the part numbers 00046858203, 00046858205, 00046859296, 00046859297, 00046863930, 01356790080.

How does the repair of the 46862957 work?

First have the fault memory of the 46862957 read out and attach the log; then disconnect the battery and remove the control unit. Next create a repair order online and send the unit in well packed. At Airbag24, checking, repair and function testing usually take 3–4 working days.

The steps in the vehicle take priority for safety reasons.

At Airbag24 the unit is then checked on the test bench, defective components are repaired or replaced, stored crash data are deleted and a function test is carried out. Your repaired unit is then 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 46862957 get to Airbag24?

The control unit 46862957 either goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair Airbag24 sends it back to you by UPS.

The printed repair order goes into the parcel, and the packaging must be shockproof.