One problem related to car stall has been reported for the 2011 Infiniti QX56. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Infiniti QX56 based on all problems reported for the 2011 QX56.
Through my research and speaking with Infiniti mechanics there has been a known issue with timing chains and associate parts that are a hazard and a major expense to 2011-2012 infinity Qx56 owners. This issue will leave you stranded somewhere!! it happens to my wife and I three times!!! I had to get it towed all three times!! the hazard is while driving on highway the engine just loses all power leaving the hazard of someone running in back of you. If you driving up an incline and this problem comes about your vehicle will stall an you can possibly start rolling backwards. So from my research this problem has been happening to people either right before there warranty ends at 70,000 miles or right after (like me) at 74,000 miles. I called Infiniti and they refused to help me in any way. The guys at my dealership said its a hit or miss with them helping owners of the Qx56 that's over the warranty. I was already $1500 in the whole on parts they thought were the problem and now they want to charge me an estimated $3,000-4,5000 to do the rest of the work. Its a fact that Infiniti knows they have this issue and refuses to recall or help the owners. I will never purchase a Infiniti again!!! and will spread the word around about them!.