Driving on freeway less than 35 mph, car made loud noise for 1-2 minutes at same time i felt under floor board something pulling. i tried to slow down, brakes didn't work. i rear ended a car. the car gear shift popped into reverse; i pressed harder on brakes & they finally worked. i noticed a big light on the dashboard saying 'malfunction, check owners manual' there was a gray symbol near these words. inside the speedometer circle that same symbol appeared in bright yellow. at some point within an hour 2 more yellow symbols appeared on the far left of the dash, a yellow triangle with an explanation point, and a car with 2 curved lines behind the back tires. when the car was returned to the dealership i purchased it from, the staff immediately attempted to blame me for the incident'asking why didn't i bring the car in for service? and that i have to get a rental car and my car repair through my insurance company. he pushed the idea of getting the car repaired. i stated i just barely got the car 3-4 weeks ago brand new. i left the car to be checked by service department. the next day the service manager denied any malfunction saying there wasn't any current codes just past codes; i asked what that meant he said a brake sensor and some other data i didn't comprehend. he said get my insurance to fix the car. i said no sir, i want more information on why the car malfunction first. once i explain to him again what happened he said he would have his forman check out this car the next morning; however less than an hour the service manager me back to say he talked to a field tech engineer and was advised that i had a right to call nissan corp to make a report. i went by srvc dpt to get something, they tried to get to take/repair my car. i didn't. once i spoke to nissan corp they said it take 6-8 weeks for investigation etc to be completed and for me not to get car repaired.