I have water in my drivers side rear light and being as i need a new one i wondered if it is possible to fit rear lights from a 5 door mk6 fiesta ? any ideas

Did you ever find out? I would have liked to have done this when I had my Fusion or if I ever get another one.

My guess is that they would fit but knowing the way modern cars are made I wouldn't be surprised if they were ever so slightly different.

We have a '57 plate 3 door Fiesta, and a '60 plate Fusion, and fittings are different, I don'th think they are interchageable.

In the end i managed to find another fusion back light  so never went down that route , the first replacement started to fill with water the first time it rained😡 but what i did do was drill 3 holes in the bottom of the bulb fitment and smeared a little grease on the metal tracks in the bulb holder .Fingers crossed 

Wanting to do the same,I think the ones with 2 silver circles only have 3 bulbs as reverse and fog are single where ours have one both sides