Reverse lights do not work
DACIA DUSTER 1.5 dCi 4x4 (81 kw / 110 hp) (10.2010 - 01.2018)

I had this problem as well. In my case it was a faulty reverse light switch. But it could be wiring problems as well. It’s easy to check the wiring: all you have to do is remove the plug connectors and make them contact with each other. If the reverse light is on, there are no wiring issues and it may be a faulty switch. You can find it under the battery.