Serious CVT Problem 
2010 Nissan Maxima Sedan 3.5 SV 4dr Sedan (3.5L 6cyl CVT)
Serious CVT Problem
 As others report, there is a dangerous problem with the CVT. After driving hundreds of highway miles twice this summer in very hot weather, the transmission failed to downshift into a lower gear upon exiting the interstate, leading to a dangerous loss of power. The owners manual indicates that this may happen during certain conditions to protect the CVT. The first time this happened the dealership found no problem. The car is being serviced, now, following the second time, with intervention by Nissan corporate. Clearly, Nissan knows it has an engineering/design problem. This may be an issue for the National Transportation Safety Board. I recommend staying away from Nissan CVT products.