Previous post stated there is no way to replace a blown map light in your rearview mirrow. I was tooling around today and there is indeed a way to replace that light. Took less then 5 mins to do this. First use a knife or some other pointed object to pop off the little clear plastic lens. Then either use the same knife/pointed object or needle nose pliers to pop out the blown light from the retainer clips that its housed in. I dont remember what type of bulb it is, and dont have my manual to refer to for the part #. But you should be able to take the blown bulb to your local auto parts place and have them find you a rather cheap replacement.