Okay, so how long do they last? My manual just says to inspect it all the way to 50000 miles. I did not see where it ever said to replace it. How many miles do you have on yours? I am going to change it this week because it has 28000 miles on it. Am I being too concerned? I know of a friend of a friend who broke one in Florida last year, not a simple roadside repair. So what are your thoughts?