Airbag control unit with part number P68185794AA

What does the airbag control unit P68185794AA do?

The airbag control unit P68185794AA is the central control unit of the restraint system (SRS) for Fiat. It evaluates the signals from the crash sensors, decides in a crash which airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit reports faults via the airbag warning light. This gives you an overview of the state of the system without removing the control unit.

After an accident, it stores crash data and locks itself.

Why does the control unit P68185794AA fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed. Other possible causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example through a weak battery or a jump start.

The crash data remains in the unit, because an ordinary diagnostic tool cannot remove it. Airbag24 erases it specifically during the repair.

The other causes act on the electronics over a longer period. Moisture at the plugs or cold solder joints gradually change how the unit behaves.

How can you tell that the P68185794AA is defective?

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

The display in the instrument cluster is the clearest sign. It shows that the system has detected a fault. Which part is affected can only be clarified with the fault memory.

Which vehicles is the P68185794AA fitted in?

The control unit P68185794AA is fitted in these vehicles: Fiat 500 312 (2007-2024).

The part number is stored for the following vehicles:

• Fiat 500 312 (2007-2024)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Have the fault memory read out before removal as well, because only this result shows whether the control unit is defective or whether a plug or a cable is the cause.

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 P68185794AA work?

At Airbag24, processing usually takes 3–4 working days. First you read out the fault memory and attach the log to the unit. Then you disconnect the battery, and only after that do you remove the control unit. Finally, you create a repair order online and send in the well-packed unit.

Airbag24 tests the unit on the test bench, replaces defective components and erases the stored crash data. A function test follows. Your own unit then goes back to the sender.

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 P68185794AA get to Airbag24?

You either send the unit as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends the repaired unit back by UPS.

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