Waynebow, welcome to the HDTimeline forum. While others will weigh in shortly, is the servicer HD and did they do the work and second diagnosis? If so, they should give you some break regarding pricing for parts and labor being the failure occured within a year and only 500 miles. Right now customer service is a BIG DEAL and very important for business right now. And don't forget to get the old parts, do you have the original ones they replaced as reference?