2009 Nissan Altima 3.5 SE 4dr Sedan (3.5L 6cyl CVT)
Car is a blast to drive. The 3.5 mated to the CVT tranny is fantastic. The combination gives immediate throttle response and will push you back in the drivers seat. The handling is great also. Very sure- footed around corners and on the freeway. Steering is tight and responsive. Quality touch and feel to the interior. Well built and stylish. Alternator had a problem (important to note that the car still started and drove fine) and was grounding out on the frame somehow only six weeks after purchase (This is my fourth Nissan and all have been very reliable). Dealer fixed without question and back on the road enjoying car the next day. Drives and feels like a $45K car
The VQ V6 engine. Has great response and power yet it is well controlled with the CVT.
None really other than maybe a lower gear ratio of the CVT to get better mileage. Getting about 21 MPG in mixed highway/city driving doing about 20 miles roundtrip daily with moderate acceleration.