While many belts last longer than 55,000 miles, I have had one break at just over 50,000 miles. Re-tension it as noted in the other posts, and get one ordered to install in the near future. With a little experience and if you realy hustle, the belt can be changed in just over an hour if you don't do the seals. That is a lot better than the Hondas. The going rate for a Honda timing belt change is $450 locally. They are an interference engine, too, so it isn't like you want to ignore it.