is there any specific mileage where this usually goes out and should be replaced?
i had my car at the mechanic recently for a vacuum leak and they had the engine top cover off but no one said anything about my car needing a new motor mount. i'd like to hope that they would see it and tell me - not to make money but to just let me know things that need fixing - tjhey did notice water leaking off my water pump - very small amount - and they said i'd likely need a new one in the near future.... but no word was said of my motor mount...but that doesn't necessarily mean it's okay...
i do notice that when I go in reverse and then hit the brake, i get a small noticeable "clunk" that seems to come from the front of the car...not sure what that is...not a motor mount as that would be behind me...