Daniel in Florida 
2003 Nissan Altima Sedan 3.5 SE 4dr Sedan (3.5L 6cyl 5M)
Somewhat disappointed
 I've driven this car for 2 years. Plenty of power, very pretty car to look at from outside, feels pretty plush inside.  Corners well.  But unfortunately I have had a spat of maintenance problems.  I've had to go to the service 4 times in the last 6 months, for a total of $2500, for various things the car computer reports.  Had to replace the A/C compressor at 80K and 4 years of age, but that seems too soon.  I was faithful to Nissan having had a new Sentra for 10 years, a used Maxima for 7, both performed well and required minor maintenance.  But this last one has left sour taste, and I will now try another brand.  I think the 3.5 motor in Altima frame is part of problem.