Yes, I was surprised at $510 for this job, but in defense of the tech, he has given me much free advise and has done some diagnostics for me without charging me. Also, he has in the past only charged half of his est. because the job took less time than the "book". I think he's an honest guy . After picking up my car I found the DYI article in this forum on this job and then felt it was a fair price and glad that I didn't tackle it myself.