So I got under my Rover the other day to change the O2 sensors and discovered that the O2 sensors themselves would come out however the plugs on the other end would not. For the front one's I'm trying not to take things apart if at all possible but the plugs are a real pain in the rear to get to and while I can reach them neither one wants to come loose. Any idea as to how to get the plugs to release? Thanks ahead of time!