Airbag control unit with part number P68185871AB

What does the airbag control unit P68185871AB do?

The function of the airbag control unit P68185871AB is to control the restraint system (SRS) for Fiat. It receives the signals from the crash sensors, decides in an emergency on airbags and seatbelt pretensioners, and checks itself continuously. It reports faults via the airbag warning light.

After an accident the unit stores crash data and locks itself. It works together with the values it receives from the sensors.

This self-check is one of the basic functions that run in the background at all times.

Why does the control unit P68185871AB fail?

Stored crash data is the most common cause on the P68185871AB: it arises after an accident even if no airbag has deployed, and a normal diagnostic tool does not erase it.

In this case the fault memory remains and cannot be removed by usual means.

Aged electronic components, cold solder joints, humidity and corrosion at plug connectors, and voltage spikes from weak batteries or jump-starting are among the further causes.

How can you tell that the P68185871AB is defective?

The airbag warning light in the instrument cluster, which lights up on the P68185871AB permanently or intermittently, is the clearest sign of a defect. Additionally, the instrument cluster shows fault messages, or the diagnostic tool finds no connection.

A fault memory that cannot be cleared also points to a problem in the control unit. In this case, airbags and seatbelt pretensioners may not deploy in an emergency.

Which vehicles is the P68185871AB fitted in?

The control unit P68185871AB is installed in this vehicle type: Fiat 500 312 (2007-2024).

The details of the type are in the overview:

• Fiat 500 312 (2007-2024)

Please have the fault memory read out first. Only then do you know whether the control unit is really affected or whether a plug or a cable triggered the fault. Afterwards, compare the part number with the label of the removed unit.

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 P68185871AB work?

First, have the fault memory read out and enclose the log. Then disconnect the battery, remove the P68185871AB, create the repair order online and pack the unit well.

Send the unit in. Airbag24 checks it on the test bench, renews defective components, erases the stored crash data and carries out a function test before the unit goes back to you.

For checking, repairing and testing at Airbag24, 3–4 working days are generally expected.

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 P68185871AB get to Airbag24?

You send the control unit P68185871AB as a parcel, or you arrange a UPS collection for an extra charge. Airbag24 handles the return of the unit after the repair by UPS.

Enclose the printed repair order and make sure the packaging is shockproof.