Battery Cable Problems of Nissan Altima

My 2012 Nissan Altima 2. 5 sl cut off while I was driving yesterday. I was going about 15 mph and making a right turn when the car cut off in the middle of the turn. There were no warning lights before, during or after the incident. I was able to coast into the parking lot where I restarted the car. There was � of a tank of gas in the car and all of the battery cables were secure. I had the battery and alternator checked and both were fine. There are 76,979 miles on the car. This was the first time this has ever happened, however, after doing some research I have learned this is a common problem with this vehicle. I have loved driving this car for the past few years, but now I am afraid this will continue to happen and could cause me to lose my life in a traffic accident. Please advise me of your official recommendation as to how I should proceed.

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For unknown reasons, the brakes stay on causing the car to either not move, or to go into limp mode. When this happens, the gear shifter can be moved out of park without depressing the brake. Also, the car can be started without having to depress the brake pedal. Sometimes, the outside brake lights stay on, sometimes they don't. I replaced the brake light switch and manually operating the switch would not make lights go off. Sometimes when driving, the brake system will release and vehicle accelerates rapidly, to the point of losing control. Sometimes, a quick pump of the brake pedal will release whatever is going on-sometimes nothing will cause it to go back to normal. Removing the negative battery cable will turn off the lights, but will not reset the problem. Dealer has no suggestions to remedy the problem, except to let them keep the car and to start replacing parts until they make the problem go away. Nissan America says Nissan has already spent too much money trying to resolve previous issues on this car and would not spend another penny!!! private mechanic that is trying to troubleshoot problem is having no luck determining the cause. There are Nissan TSB's about shorted wiring, but only Nissan techs can acces those. Car has been in shop 44 times for 62 days for various major problems that Nissan can't or won't fix completely. Nissan refuses to try to make the situation right, even though they admit the down time is exorbitant and not in lines with their company satisfaction guarantee.

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2012 Nissan Altima would not shut off. Ignition switch was unresponsive. The fuel pump fuse had to be removed so the car would shut off. Then the negative battery cable was removed to reset. Battery cable was reconnected and fuel pump fuse reinstalled. Car would now start and shut off normally. This has only happened once but it concerns us because this car is only four months old and has less than 5,000 miles.