Airbag control unit with part number 50545936

What does the airbag control unit 50545936 do?

The airbag control unit 50545936 controls the restraint system (SRS) of Alfa Romeo. It evaluates the signals from the crash sensors, decides in a crash within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports detected faults via the airbag warning light.

The decision has to be made so quickly that airbags and seatbelt pretensioners work in time. For this reason the unit runs continuously and checks the wiring to the firing circuits as well as the sensors.

After an accident, the unit stores crash data and then locks itself. The manufacturer's number Bosch 0285013909 is also printed on the housing.

Why does the control unit 50545936 fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered. A normal diagnostic tool cannot erase it. Ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

The unit stores crash data as soon as it records an event, and the data stays in memory. An ordinary reading device cannot remove it. At Airbag24 the data is erased during the repair, before the unit is tested.

Electronics age like any other component. Solder joints can give way, and moisture and corrosion at the plugs disrupt the contact. Voltage spikes, for example from a weak battery or when a jump start is connected, add further strain to the circuit.

How can you tell that the 50545936 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. In addition there is a fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The light indicates the defect. Even an intermittent lighting-up is a warning signal that deserves a check.

If the diagnostic tool cannot establish a connection, the cause does not necessarily lie in the control unit. Wiring and plugs are also possible, and only the read-out log shows where the fault lies.

Which vehicles is the 50545936 fitted in?

The unit 50545936 is fitted in these vehicles: Alfa Romeo Giulia 952 (2016-2023) and 952 Facelift (from 2023).

The following list shows the vehicles recorded for this part number:

• Alfa Romeo Giulia 952 (2016-2023)
• Alfa Romeo Giulia 952 Facelift (from 2023)

Before removal, compare the part number on the label of the removed unit with this page. This only confirms that it is the right unit. Also have the fault memory read out in advance, because only that log shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 50567775.

How does the repair of the 50545936 work?

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

At Airbag24 the unit is examined on the test bench. Defective components are replaced, stored crash data is erased and the unit undergoes a function test. Your own unit then goes back to you.

When removing it, make sure the plugs and fastenings remain undamaged. The 3–4 working days cover only checking, repairing and testing at Airbag24, not the steps and shipping before or after.

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 50545936 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.