Two problems related to brake sensor have been reported for the 2009 Nissan Altima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Nissan Altima based on all problems reported for the 2009 Altima.
Issue: unintended acceleration conditions: 2pm/clear/parking lot while making u-turn to the right, brakes did not respond. Stepped again on brakes, more firmly, but did not slow car which continued to roll slowly forward about 7 mph. Suddenly, loud revving, car continued forward roll. Immediately, added left foot to brake, pressing with full weight. No response. About 2-3 second after revving/hard braking, the car opened full throttle and hurtled forward about 1-1/2 to 2 car lengths; slammed into wall. Airbag did not deploy my car had only 25290 miles (only about two years of normal usage) at the time the system failed. My left knee sustained small gash from the underside of the steering column when I was slammed back after impact threw me forward, forehead knocked the upper steering wheel. Note: about 1 month prior to accident, the audio controls on my steering wheel honked the horn instead. The next day, they were ok. The same thing happened when tested at the collision center after accident; it's on tape. The rep at the collision center was informed of the switch problem from the start. When I them tested days later, the audio controls worked properly. Also, an indicator on the dash went from showing the mpg with a bar as I accelerated or slowed, then switched to a digital report of 18 mpg/city. It kept shifting between these indicators without my interference. Finally, the airbag failed to deploy although impact clearly exceeded 15 mph. I believe there was a severe failure of the electrical system; the cvt system with its sensors, etc. Is dependent on it. My account parallels reports I have uncovered about sudden acceleration. I noted that often an event was precipitated by a slowing, and a turn. When I recently talked to a Nissan tech about the switches, airbag, indicator failures, he mentioned pinched harness could be a possibility.
I have a 2009 Nissan Altima which I bought brand new. My car has only 76k miles. The problem is there is rust forming at the floorbeds which is making the car unsafe and is causing brakes issues. I was told Nissan knew about the rust problem from a very longtime. Last week, I spend $210 to fix air leaks due to failed sensors. The problem is affecting brakes and sensors of the car which is making the car unsafe.