Brad, it was relatively easy to do, a bit fiddly as you have to lie on the drive or road, then you gently prise out the existing light, and disconnect from the wiring connector, then insert the projector lamp. Wiring is a plug, no issues with faults ect. It is really effective and a nice effect. If the GC has downwards facing door lights. I would do it again, that is as long as its warm and dry!!