It is one of the tail lights. Turn them on, walk around, one will look different from the other. Good luck. In my V70 the place that you have to put your hand in order to change these is like a commercial grade hamburger machine. Least I think it is a tail light...doesn't say "rear postion light" perchance? If not I guess it could be in front. What we might call parking lights, but I had one of those burn out and got no message.