I have never had any issues with my 6 until 2 days ago. I was driving along and heard what sounded like a belt slip off a pulley or something similar, (kind of a squeal). Immediately the car lost power and I began to coast till I could safely pull over. Once at a stop, I turned the push to start off, and then tried to restart the engine. The battery light came on and flashed so I stopped. I got it home and tried to jump off the battery after cleaning the connections and hooking back up. The battery was completely dead to the point the interior lights didn’t have enough juice to come on. Once hooked up to my truck, the battery was able to charge enough to bring the dash and interior lights back on but not enough to start. I checked the serpentine belt that comes around the alternator pulley and it was not broken or loose. I had a shop come pick it up to take a look at it and they are saying the battery is dead, and the starter is bad... then he says that the engine is seized...? Just trying to figure out if this sounds legitimate or if he’s just trying to make a buck? He’s already gotten the pricing on a new engine from Mazda and is quoting $6,500 with parts and labor... please advise! Thank you!