Airbag control unit with part number 50556469

What does the airbag control unit 50556469 do?

The airbag control unit 50556469 is the central unit of the restraint system (SRS) in Alfa Romeo. It evaluates the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports detected faults via the airbag warning light.

The unit works constantly during operation and checks sensors, output stages and connections. As a result the system stays ready, even when nothing happens in everyday driving.

After an accident it stores the crash data and is locked afterwards.

Why does the control unit 50556469 fail?

Stored crash data after an accident are the most common cause, even if no airbag has triggered. A normal diagnostic tool cannot erase them. Other causes include aged electronic components, cold solder joints, moisture and corrosion, and voltage spikes.

The crash data remain in memory until they are erased. Airbag24 erases them during the repair, and the unit is then tested.

Aged components and solder joints that give way belong to the other causes. Moisture and corrosion at the plug connections are added.

Voltage spikes arise, for example, from a weak battery or from connecting jump leads, and they put strain on the electronics.

How can you tell that the 50556469 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and an error message appears in the instrument cluster. The diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then fail to trigger in an emergency.

The light indicates the defect. Lighting up only intermittently is equally a warning that must be checked.

If there is no connection to the diagnostic tool, the control unit need not be the cause. The fault memory read out clarifies what the problem is.

Which vehicles is the 50556469 fitted in?

The unit 50556469 is fitted in these vehicles: Alfa Romeo Stelvio 949 (2017-2023) and 949 Facelift (from 2023).

This list shows the vehicles for this part number:

• Alfa Romeo Stelvio 949 (2017-2023)
• Alfa Romeo Stelvio 949 Facelift (from 2023)

Comparing the part number on the removed unit with this page only confirms that it is the correct unit. Having the fault memory read out beforehand, on the other hand, 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 285013327, 50543842, 50543843, 50558474, 50558475, 50567379.

How does the repair of the 50556469 work?

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

Airbag24 tests the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. Your own unit then goes back to you.

Shipping and your own preparation are not included in this time.

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 50556469 get to Airbag24?

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

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