Is it a series 1 (FD) or Series 2 (GD) as both were built in 2012.
Oh yes, you're right. It's a GD. Unfortunately, I came across a few threads on hyundai-forums.com yesterday in which people tried to do exactly the same, but failed. As it turns out, part of the wiring is missing for the sensor to work (only two wires run to the fake sensor, whereas the real one needs 8 wires). If I can find a minute I'll pop the fake sensor out to see if it by accident has 8 wires, but I don't hold my hopes up. I was able to cancel the order for the parts in time, but I'm disappointed that this feature is not going to happen on this car.
Is that the light sensor in the 2nd photo? My FD's light sensor was circular.
In the GD this is indeed the shape of the sensor. If the car doesn't have the Auto Light feature, then there's a blinking LED in the fake sensor that's supposed to scare off the baddies.