So my "check engine" light came on a few days ago. I did the usual, check the gas cap etc... Light was still on after two days so I scheduled to have it checked out. Made an appointment and as I arrived, the light went out. I should have followed my instincts and left right then and there, but since my wife is the primary driver of the vehicle, I cautioned on the side of safety, and had the diagnostic service done on the vehicle (2017 Mazda CX-9). No error codes were found, but was told I needed an "ECM (Electronic Control Module) update" which is basically the computer that manages the vehicle's systems. I was wary, but I was there, and again I chose to err on the side of caution, and agreed to the $270 fee for the service.
A bit later I was advised that my A/C filter (cabin air filter) needed replacing. I found that odd because 3 weeks earlier, I replaced the cabin air filter myself with a K&N reusable filter. So the advisor, knowing he was caught says "Maybe its the engine air filter." I said "Can't be because I also replaced that with a K&N reusable filter." Noticing he had nothing else, the advisor says "Maybe I was looking at the wrong car." and then says "I should have you out shortly." Had they actually taken the time to check what they advised needed replacement, they would have noticed a big K&N sticker that reads "STOP, THIS FILTER IS REUSABLE. DO NOT DISCARD!"
After today's experience, I will never go back to Gunther Mazda for service. They have lost my trust in the service department after what I was advised of at this visit. I guess it goes to show you, that the mighty dollar is more important than earning customer trust and keeping customer loyalty.