I had only 2 things go wrong with the car:
Problem 1 was at about 70,000 miles, the check engine came on, and took it into Nissan after I had the codes ran, and found out it was an exhaust problem on the front bank. Nissan delivered a quote of about 1,100 bucks. I said no thanks, as I was told it more specifically was the front bank's cat was failing, but they did replace the O2 sensor on that bank, just to make sure it wasn't that. After deciding not to fix it, and continued to pass smog, I pushed on and put over 70,000 more miles, and was even told the only things I was really doing to the car by not fixing it, was sacrificing some gas mileage.
Problem 2 was around 110,000 second gear shift (from first to second) was a hard shift after the car warmed up. Had a few shops test drive it, and all said basically same things, that it was most likely a spring or something simple, and would be about 500 bucks. Again, chose not to worry about it, and continued driving it, till I decided to trade it in for a newer Maxima.