Smart you posted here ... pretty sad the dealership service departments have a reputation of being after people's money. The dealership service departments seek to fix everything around a problem so the replace.all the parts which then fixes the actual problem and also does remove.other issues which may come later Of course the bill triples in the process. Typically a problem is caused by one thing when you get a proposed.fix.saying.you should replace.many more things at.a much greater cost you should get.a.second opinion.