Airbag control unit with part number 00046865029

What does the airbag control unit 00046865029 do?

The airbag control unit 00046865029 is the controller of the restraint system (SRS) for Fiat and Opel. It processes the readings from the crash sensors, decides within milliseconds in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light, and after an accident it stores crash data and locks itself.

Monitoring covers the sensors, seatbelt pretensioners, airbags and the wiring between them. Every deviation detected is recorded in the fault memory.

Why does the control unit 00046865029 fail?

Most often the cause is crash data left over from an earlier accident, even if no airbag went off. A normal diagnostic tool cannot erase this data. Other causes include aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Airbag24 erases crash data during the repair. The other causes at a glance:

• Aged electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 00046865029 is defective?

An airbag warning light in the instrument cluster that stays on permanently or only intermittently is the first sign. Add to that a fault message in the instrument cluster, a diagnostic tool with no connection to the control unit, and a fault memory that cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may therefore fail to deploy.

Please take such signs seriously and have the system checked promptly.

Which vehicles is the 00046865029 fitted in?

The control unit 00046865029 is used in vehicles from Fiat and Opel. Specifically, it 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 vehicles at a glance:

• 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)

Compare the part number on the removed unit with this page to confirm the correct control unit. That is only the assignment, though. Have the fault memory read out beforehand, because it 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 00046858203, 00046858205, 00046859296, 00046859297, 00046863930, 01356790080.

How does the repair of the 00046865029 work?

First have the fault memory read out and enclose the log. Then disconnect the battery before removing the control unit. Next, create a repair order online and send in the carefully packed unit.

Airbag24 tests the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. Your own unit is then returned to you. Processing usually takes 3–4 working days, referring to the work at Airbag24.

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 00046865029 get to Airbag24?

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

Packed shockproof and with the printed repair order in the parcel, the unit is well prepared.