I recently purchased a 2008 Nissan Altima coupe. To turn the car on/off it utilizes a push button rather than an actual key. The other morning I drove to work and parked in the public garage @ 8:00 am. I must have forgotten to push the off button because when I returned to the vehicle that evening 4:30 pm it was running and had burned 1/4 of a tank of gas. Besides feeling real stupid, I thought about how dangerous this could have been. Because the engine was running the doors did not lock, therefore the car was running and unlocked all day. The vehicle could have been ransacked, stolen or worse, if this had taken place in someone's home garage, or driveway or on a street, a child could have gotten into the vehicle, engaged it in drive and caused damage or injury to someone or personal property. Vehicles with this "smart key" technology should have a built in safety/anti-theft system that would automatically shut the engine off after 15 minutes of idle. It should not have run 8-1/2 hours. Please advise.

- Forked River, NJ, USA

There were no events leading up to the failure. The car had been parked all night and at 330 a.M. it caught on fire. It had never been any problems with the vehicle. The fire department was called and they put out the fire. They said that the electrical fuse box caught on fire.

- West Helena, AR, USA

I have a 2008 Nissan Altima. It has a push button star/stop switch and no keys are needed. I accidentally left the car in drive and pushed the off button and left the car. The car turned off and rolled out of the parking lot and into oncoming traffic. I was not in the vehicle at the time. This is very dangerous.

- Metairie, LA, USA

The contact owns a 2008 Nissan Altima. While driving approximately 65 mph, the vehicle lost power and then restarted soon after. The contact drove the vehicle to the dealer and they stated that the electronic control module needed to be reprogrammed. The mechanic also stated that there was a recall related to this specific failure. She called the manufacturer and was informed that her vehicle was included in the recall. The repairs were performed on the vehicle, but the failure recurred soon after. She returned to the dealer and was informed that the crank shaft position sensor needed to be replaced. The manufacturer stated that there was no recall for this failed component and they were not liable for the repairs. The vehicle has not been repaired. The VIN, NHTSA campaign id number, and failure mileage were unknown.

- Hampton, GA, USA

First day for pick up, headlight pop, fix it the next day, took 90 minutes just to fix one headlight, after 6 weeks, car turns off when driving one of the most busiest hwy and the steering locks; only way to start it is by putting it to "park" hold brakes down all the way then push the button and coming from that, it was not safe at all, drivers were honking and swerving just to maneuver away from me, called dealership to where I purchase car to fix the problem, told them that the car had turned off 4 times on the same hwy and thank god it turned off on a straight away not while turning, showed them a video in which I intend to hold for evidence. Drop it off 7:00am, dealership had said about codes; there was nothing wrong with the car and had replug every plug that was on the car in which it would be reset, gave car back within 9 hours saying the car will not turn off again and if it happens again bring it back. After a week and a half, the car had turned off plus with the gauges(not knowing the speed I was going) and radio display went out and this is when it was raining hectic and I wasn't able to use high beams automatically to where it locks forward but to pull it towards me manually while driving. Already told dealership that this car is a big concern on the road for safety because when it turns off I become a crashing incident in which if that happens I will blame Nissan for that.

- Sugar Land, TX, USA