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I have been having a lot of problems with my 2001 Mazda Millennia, V6,2.5L. Ever since I bought is used in 2010, I have had it in the shop for a variety of things. I had to replace my A/C compressor, radiator (due to overheating), oxygen sensors (several), Mass Air Flow Sensors (two replacements), Fan Motor, and the latest: throttle body and another Mass Air Flow Sensor. I had been trying to find a replacement throttle body but every time I was offered a replacement, it looked nothing like the one taken out of my Mazda. By a stroke of luck and coincidence, I accidentally saw a photo on-line of a Mazda 626 throttle body which looked exactly like the throttle body I was trying to replace. QUESTION: It is obvious that the mechanic at small used car dealer put in a Mazda 626 Engine Harness Assembly instead one for a 2001 Mazda Millennia. COULD THIS BE THE REASON FOR MY MANY ENGINE BREAKDOWNS? AND HOW COULD THE MILLENIA COMPUTER NOT RECOGNIZE A NON-MILLENIA PART? AND HOW CAN I RECTIFY THIS SITUATION SO I DON'T HAVE TO GO GET MY CAR FIXED EVERY MONTH? The cost for all the repairs more than exceeded the purchase price of the car. If I had known I would have to pay so much for repairs, I would have purchased a new car earlier. Thanks for your reply. JMR