Airbag control unit with part number 50531518

What does the airbag control unit 50531518 do?

The airbag control unit 50531518 is the central control unit of the restraint system (SRS) of Alfa Romeo. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered.

In doing so it monitors the system continuously and reports faults via the airbag warning light. After an accident it stores crash data and locks itself; the lock is only lifted by the repair.

Why does the control unit 50531518 fail?

The most common cause is crash data from an accident, even without a triggered airbag. Further causes are ageing electronics, cold solder joints, moisture and corrosion, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 removes it during the repair.

In addition to the crash data, the following causes come into consideration:

• ageing electronic components
• cold solder joints
• moisture and corrosion on plug connections
• voltage spikes, for example from a weak battery or jump-starting

How can you tell that the 50531518 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, a fault message appears in the instrument cluster, the diagnostic tool receives no connection to the control unit, and the fault memory cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then not deploy.

The warning light shows the state of the system at a glance, so it can be read on every journey. Such signs justify having the system checked.

Which vehicles is the 50531518 fitted in?

The information refers to the assignment at Airbag24. The control unit 50531518 is fitted in these vehicles: Alfa Romeo Giulietta 940 (2010-2016) and 940 Facelift (2016-2021).

The following overview lists the vehicles recorded for this unit at Airbag24.

• Alfa Romeo Giulietta 940 (2010-2016)
• Alfa Romeo Giulietta 940 Facelift (2016-2021)

A comparison of the part number on the label with this page only confirms that the unit is the correct one. Therefore have the fault memory read out beforehand; it shows whether the control unit is faulty or whether a plug or cable is responsible.

For the same vehicles, we also repair control units with the part numbers 285010935, 285011725, 50520767, 50527474, 59001157.

How does the repair of the 50531518 work?

First have the fault memory read out and attach the log, before you disconnect the battery and remove the control unit. Then send the well-packed unit in with the repair order created online. Processing at Airbag24 usually takes 3–4 working days.

This sequence is mandatory for safety reasons.

On the test bench, Airbag24 checks the unit, replaces defective components, removes the crash data and carries out a function test. Afterwards your own unit comes back 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 50531518 get to Airbag24?

Either you send the unit as a parcel, or you book a UPS collection for an extra charge. Airbag24 sends the unit back by UPS after the repair.

Enclose the printed repair order in the parcel, and the unit is packed shockproof.