The factory spare tire was installed as reult of a flat lf tire. Upon driving to the car dealership on dry highway, to repair flat, the cars AWD lock initiated by itself at 50 mph causing the drive system to overheat within a couple minutes. Steering felt like all wheel drive was active along with a light growling noise. Dash alarms came on indicating 'high temperature, stop vehicle'. I stopped, AWD lock indicator goes off along with high temperature alarm. Resumed driving to dealership and 1minute later the problem repated exactly the same again. Resumed driving again, problem repeats two more times resulting in 4 total stops on the interstate highway before an exit. Nissan dealer analysis states that when reaching 50 mph with spare tire in use will happen and is not defined as a valid defect or problem. I believe this creates safety hazards from stopping, change in steering handling and potential of major components failure possibly fire of overheating.

- Rochester, NY, USA