Airbag control unit with part number 51746149

What does the airbag control unit 51746149 do?

The control unit 51746149 is the airbag control unit for Fiat and controls the SRS restraint system. It evaluates the crash sensors, decides in a crash within milliseconds on airbags and seatbelt pretensioners, and monitors the system continuously.

It reports faults via the airbag warning light in the instrument cluster.

After an accident, the unit stores crash data and locks itself.

Why does the control unit 51746149 fail?

Stored crash data from an accident is the most common cause, even if no airbag has fired. A normal diagnostic tool cannot erase it. In addition come aged electronics, cold solder joints, moisture in plug connections and voltage spikes.

The crash data stays stored until it is specifically removed, which is why the fault can also appear long after the accident.

Aged components and solder joints lose reliability over time, and moisture attacks contacts. A weak battery or a jump start can additionally load the electronics.

How can you tell that the 51746149 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently; at the same time an error message appears in the instrument cluster. The diagnostic tool then finds no connection to the control unit, and the fault memory cannot be cleared.

A defect in the control unit can mean that airbags and seatbelt pretensioners do not deploy in an emergency. The light shows the defect as soon as it occurs, so a prompt check is advisable.

Which vehicles is the 51746149 fitted in?

The 51746149 is fitted in these vehicles: Fiat Croma 194 Facelift (2007-2011) and 194 (2005-2007).

The list names the vehicles in which this unit is fitted according to our data.

• Fiat Croma 194 Facelift (2007-2011)
• Fiat Croma 194 (2005-2007)

First compare the part number on the label of the removed unit with this page; that only confirms that it is the correct unit. Then have the fault memory read out. Only the result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 51814843.

How does the repair of the 51746149 work?

Have the fault memory read out and enclose the log. Then disconnect the battery and only afterwards remove the control unit. Next, create a repair order online and send the unit in well packed. Airbag24 needs 3–4 working days in total for checking, repair and testing.

The sequence protects you during removal and is therefore binding.

Airbag24 checks the unit on the test bench, replaces defective components and erases stored crash data. A function test follows before your own unit is sent back.

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 51746149 get to Airbag24?

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

The repair order you print goes into the parcel; the control unit is packed shockproof.