I bought a used Nissan Murano at carmax. I had trouble from the start.
I had it in the shop almost every 2 weeks for repair. One time the driver seat broke on me!! It was leaking oil on me another time and the car-max repair people told me to just put more oil in it!! I spent alot of money on that car in the 2 years that I had it.
It finally broke down on me in July, 2011 and the Nissan repair place said it needed a new engine and transmission, around $7000.
I gave it back to car-max and now they want me to pay the balance on the car note. I will certainly not buy another car from Car-max.