One problem related to power steering pump has been reported for the 2013 Infiniti QX56. The most recently reported issues are listed below.
Driving down highway 421 in wilkesboro, nc on a 45 mph section of the highway, merged over into the turning lane to turn left across two lanes of traffic. Waited for a break in traffic, upon a break in traffic tried to accelerate to cross traffic, as vehicle started to accelerate it stalled in middle of road. Wife and children in car started screaming. Traffic nice enough not to run into us. Had car towed to local automotive repair shop. Found that this is a common problem for the 5. 6 litter Nissan/ Infiniti engine. One of the timing gears for the left bank stopped rotating some how. This side of the engine timing system also powers the fuel pump so that you cannot even limp across the road on half the engine. It just stops right where you are. You have no steering no breaking and no propulsion. This is a dangerous situation and the manufacture should be held responsible for the design and lack of quality of the engine.