IT IS clearly unacceptable for an auto to fail at such low mileage, and I would be pressing Mazda for at least part of the cost of replacement. Servicing is important on an auto to keep the oil fresh ...
This is indeed a known problem on these transmissions and one for which Mazda issued a Technical Service Bulletin (TSB; like a recall but not safety related) back in 2014. Apparently, a problem with ...