I own a 2014 mazda 5. after two years of ownership. the number 1 and 4 cylinder rod bearings failed completely. it happened while the car was in motion. proper oil changes was maintained during this period. they took the motor apart found clean oil, and shavings.
Tl* the contact owns a 2014 mazda 5. while driving various speeds, the engine revved at a high rate as if the vehicle would take off. the failure occurred while the vehicle was parked and the engine was warmed up. the dealer was unable to determine the cause of the failure. the manufacturer was not notified of the failure. the failure mileage was 80,000.