The question is warranty. If the reg was purchased new by you then you probably have a lifetime parts replacement warranty. If the reg is not serviced or inspected annually you lose the warranty. With only two years the dealer would probably honor the warranty if you brought it in. If it goes longer you will lose it or have to pay to have it reinstated. If its an old or second hand reg this is not as important. The parts warranty saves you a lot of money over the life of the reg....