Airbag control unit with part number 00046858204

What does the airbag control unit 00046858204 do?

The airbag control unit 00046858204 is the central control unit of the restraint system (SRS) in Fiat and Opel. It evaluates the signals from the crash sensors, decides within fractions of a second in a crash which airbags and seatbelt pretensioners to trigger, and monitors the system continuously.

The unit reports faults in the restraint system via the airbag warning light in the instrument cluster. After a crash, it stores crash data and locks itself.

The control unit works constantly in the background, even if in everyday life you notice nothing of it. It checks the connections to sensors and actuators so that it can react reliably in an emergency.

Why does the control unit 00046858204 fail?

Stored crash data from an accident is the most common cause, even if no airbag has deployed; a normal diagnostic tool cannot erase it. Further causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Airbag24 erases the crash data during the repair. Whether one of the other causes is also present only becomes clear on testing.

Electronics age, and solder joints can be damaged over time. A cause from this group is therefore also possible.

How can you tell that the 00046858204 is defective?

A defect shows up as the airbag warning light in the instrument cluster lighting up permanently or intermittently, as an error message in the instrument cluster, as a missing connection to the diagnostic tool, or as a fault memory that cannot be cleared.

The airbag warning light indicates the defect as soon as the system detects it. As long as it is lit, the airbags and seatbelt pretensioners may not deploy in an emergency. Therefore have the system checked promptly.

Which vehicles is the 00046858204 fitted in?

The control unit 00046858204 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). The part number, not the model name alone, is decisive.

The list shows the vehicles in which this control unit is known to us.

• 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 tells you that it is the right unit. Have the fault memory read out as well: only this result shows whether the control unit is defective or whether a plug or cable is the cause. Have it read out before removal.

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 00046858204 work?

First have the fault memory read out and enclose the log; only then disconnect the battery and remove the control unit. Then create a repair order online and send the well-packed unit. Checking, repairing and testing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Afterwards your 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 00046858204 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After repair, Airbag24 returns it to you by UPS.

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