While applying the brakes, the pedal went to the floor. The consumer was unable to maintain control the vehicle and hit a tree. The air bags did not deploy. The consumer sustained head and back injuries and was transported by ambulance to the hospital. The vehicle was towed and totaled by the insurance company. Please fill in additional information.

- Northfield Center, OH, USA

Car automatically rapidly accelerates when stopped. The anti-lock off light appeared. This rapid acceleration has happened to me three times in a two week period. I am 50 years old and have never had an accident. Now I have rear ended two people when I was completely stopped. The first time, the car stopped when I hit the car in a drive through mcdonald's. the second I was stopped 2-4 feet behind a pick up truck at a light and my car accelerated and hit him. I had to put my car in park to stop it after I hit him. The third time it occurred I was the first one in line at an intersection. I did not hit anyone, but had to shut the car off for it to come back to a complete start. The dealership has had my car on two occasions and it did not malfunction when they had it in their possession. However, the service manager told me that they have had problems with the Sentra model. I now am fearful of driving my car and put it in park whenever I stop. I am going to write to the president of Nissan. This is my third Altima and I love my car I am just petrified to get behind the wheel. The next time it happens it may be when I am dropping my son off at school.

- Shreveport, LA, USA

I started to brake my vehicle well before a red traffic light. In the line of traffic, I was braking firmly but my vehicle would not come to a complete stop. At the red traffic light, my vehicle kept bumping a BMW in front of me. I began honking my horn for the driver of the other vehicle to move forward, but she did not. With my foot constantly on the brake, I put my vehicle into park. When I did that, it accelerated more. A man in a truck in the next lane saw that I was having difficulty braking, so he shouted taht I should turn off my ignition. I did. The vehicle finally stopped. The driver of the BMW approached my car asking what was going on. The man in the truck verified to her that I was braking, but couldn't stop my vehicle from bumping her. We exchanged information. I drove my vehicle to my service mechanic nearby. He could find nothing wrong. I took the vehicle to the dealer the next day. The dealership mechanic checked the vehicle and a dts was also called to inspect my vehicle. The also could find nothing wrong with the brakes, but they did fix my air conditioner. It was leaking inside the car on the passenger side. The rug was completely soaked. The also could find nothing wrong. The vehicle is now parked (delivered by dealership) in front of my home because I am afraid to drive it. I have done research about these episodes called "spontaneous acceleration". I also see that you have complaints similar to mine that suggest the same problem exists in other Altima's, as well as other make and model vehicles. Hopefully, you will investigate this matter. I refuse to become a fatality statistic by taking the chance of driving my car and having this unpredictable event occur again. Nor do I want to hurt anyone else. I want Nissan to replace my vehicle. I have done other investigating on the internet in relation to "spontaneous acceleration". I am quit concerned that the NHTSA is not investigating these complaints.

- Westfield, NJ, USA

Consumer had to use a lot of force when applying brakes. Engine revved up to 2500 rpms, not stopping at any occasion. Dealer just fixed it & twice it has done the same. There was surge in engine while stoped at light, and the RPM went from 750-2500. Although the vehicle was seviced, the problem reoccured. The dealer found out that the cause was a faulty throttle position switch. However, the problem still exists after the switch was replaced.

- Kitchener, CD, USA