Technical Check Airbag Warning Fix - 2019 Fiat 500 1.2 120th anniversary model

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Technical Check Airbag Warning Fix - 2019 Fiat 500 1.2 120th anniversary model

G1WLM

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Dec 2, 2019
Messages
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Hello, everyone. I just wanted to share this for the benefit of others who may have experienced the check airbag warning appearing on the dashboard.

I had this warning message come up earlier today, which coincidentally happened at the same time I was opening the driver's door (the car was idling).

I never thought about a link to the door being opened at the time; however, another owner shared on Reddit that she had the same fault and that the cause was a wire break in the wiring loom to her driver's door.

I, too, found a broken wire when I pulled back the rubber sleeve to reveal the wiring loom to the driver's door. In fact, in my wrangling with the sleeve, I actually broke another wire. I am an electrician, so I am fortunate enough to be able to effect repairs. However, I actually found 5 wires warranting repair, with a further 5 that had cracked insulation and were on their way to failing.

The long and short of it is that there are 17 individual cables in the loom to the door, and it's clearly a weak point for our car, which has less than 20,000 miles on the clock.

If you experience airbag warning light troubles, you might do well to look in the same place before losing too much sleep over it.

I use a fairly basic draper OBD scan tool, which usually meets my needs; however, on this occasion, no diagnostic trouble codes were present.
 
Model
1.2
Year
2019
Mileage
19500
Thanks for the report. I had this too on a 2020 car and I think there was at least one other report from a similarly-aged car.

As this hasn't previously been a reported issue on 500s I wondered if there had been a change of spec or supplier around this time.
I have a 2018 model and the same thing has happened.

I’ve repaired the damaged cable using small sections of wire. However, several other cables are looking worn so i imagine there’ll be further problems ahead. I think cutting the loom inside the door and replacing all the wires would be a better option.

Does anyone know where to purchase the connector block that the wires run into from the door?
 

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Last edited:
The part number 735591687 corresponds to a dashboard stereo trim and control panel switch for the Fiat Punto. This component primarily involves the dashboard's aesthetic elements and certain control switches, such as the hazard light switch. It does not directly interface with the airbag system. Therefore, replacing or installing this part should not, under normal circumstances, affect the airbag warning light.
 
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