Is it hard to change the back row of spark plugs on a V6 outlander and if so does anybody know what I need to take off ? Thanks

 

it looks like you need to remove the intake manifold

 

If you are less than 120 000miles, don't bother unless you think they are causing a problem. They are irridium plugs that should last at least that long. If you want to check, pull one of them from the front bank and look at it. The same plugs in my toyota are rated for 120k miles.