Loved my Infinity JX was awesome unto 87,000 miles. And then, transmission started the sputter. I went to Mission Viejo dealer several times, to get a diagnostic code needed for the warranty co to cover the issue. The dealer never "found" a code. Instead, I took the suv to a 3 rd party auto concern, Hanlon Auto, in Laguna HIlls. They found the code instantly. I returned with the code to the dealer. They received clearance from my exwarranty co, the transmission was replaced. After the replacement, while driving away, the car began the sputtering again. Currently as of 6-7-17, the sputter is present. I returned the vehicle, they claim the car is "driving as designed."