Airbag control unit with part number 51952929

What does the airbag control unit 51952929 do?

The airbag control unit 51952929 controls the restraint system (SRS) at Fiat. From the signals of the crash sensors it works out, in an emergency and within milliseconds, which airbags and seatbelt pretensioners trigger. It also monitors the system continuously and reports faults via the airbag warning light.

The manufacturer number Bosch 0285012073 is also printed on the housing, which helps when comparing with the label.

During operation the unit stores detected faults in the fault memory. After an accident it stores crash data and locks itself.

Why does the control unit 51952929 fail?

For the 51952929, stored crash data is the most common cause, even when no airbag has deployed; a normal diagnostic tool does not erase it. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from a weak battery.

Crash data is stored in the event of an accident and remains in the unit. Airbag24 removes it during the repair, which is a fixed part of the process.

The remaining causes concern the electronics and its connections. Components age over time, solder joints can go cold, and moisture or corrosion impair the contacts. Voltage spikes can also put a strain on the circuit.

How can you tell that the 51952929 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, error messages appear, the diagnostic tool finds no connection to the control unit, or the fault memory cannot be cleared. In this state, airbags and seatbelt pretensioners may possibly not deploy in an emergency.

These signs are particularly important:

• warning light in the instrument cluster stays on permanently or intermittently
• fault message in the instrument cluster
• no connection between diagnostic tool and control unit
• fault memory cannot be cleared

The warning light is the system's own message, so a check should not be put off.

Which vehicles is the 51952929 fitted in?

The control unit 51952929 is fitted in these vehicles: Fiat 500 312 (2007-2024). Comparing the part number on the unit with this page shows that it is the right unit.

The models assigned to this part number follow here:

• Fiat 500 312 (2007-2024)

Have the fault memory read out in advance as well. Only the log shows whether the control unit is defective or whether a plug or cable is the cause. The label comparison does not achieve this.

For the same vehicles, we also repair control units with the part numbers 51782985, 51870005, 51897810, 51918659, 51963734, 519637734.

How does the repair of the 51952929 work?

At the start, the fault memory is read out and its log is attached. Then you disconnect the battery and only then remove the 51952929. Online you create the repair order and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

The order serves your safety and is therefore binding.

Airbag24 checks the unit, replaces defective components, erases the crash data and carries out a function test. Afterwards the unit goes 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 51952929 get to Airbag24?

You send the 51952929 as a parcel, or book a UPS collection for an extra charge. After the repair, UPS brings it back.

Enclose the printed repair order and make sure the unit is packed shockproof.