This is one of the most common problems among BMW i3 owners. From the outside, the symptoms can indicate different problems with different solutions. You plug in the plugs, but the charger won't even turn on and charging won't occur. Sometimes the solution is very simpler than expected: the fault could be in the power outlet or the charging station, so it's not certain whether it's a fault with the car's charging system. The solutions are simple: try different chargers, different cables, and different household outlets. Only if the problem persists after these attempts should you suspect a problem with the car's charging system.