2003 Nissan Altima 2.5S review from North America

My parents helped me buy a 2003 Nissan Altima 2.5S as a graduation gift. It's been running decently and have been good with maintenance (oil change, brakes, tires). I brought it in for a recall back in 04/07 for an ECM reprogramming. Then, the past month I've had multiple issues. First, while driving on the expressway, the car de-accelerates. Also, when driving at slow speeds (15-25), the car stops. This has happened on 4 different occasions in the past 2 weeks. Another problem I've had is that at times, the car does not start up. Even when it was running perfectly well 30 minutes prior. I've brought it into my mechanic on 4 different occasions to have the fuel injector cleaned ($150). Then, when that didn't solve the problem, I had the air flow sense replaced ($600). My mechanic found a recall on my car (my VIN # falls into the category). 2 dealerships had no recall and I called Nissan Corporate but to no avail. nothing is being recalled, which is ridiculous since I have the paper with the recall information. Like the other posts, I need the crank shaft sensor replaced but Nissan is not going to cover it. This is our 3rd Nissan and will not be buying any more from no own. I'm ready to get rid of it and buy a Honda or a Toyota.