One problem related to catalytic convertor has been reported for the 2012 Infiniti QX56. The most recently reported issues are listed below.
Tl the contact owns a 2012 Infiniti Qx56. The contact stated that the vehicle stalled while attempting to drive and the service engine indicator illuminated. The vehicle was taken to austin Infiniti (8140 burnet rd, austin, TX 78757) and the catalytic converters were replaced twice in one year. Two years later, the same failure occurred. The vehicle was taken to an independent mechanic who stated that the driver's side catalytic converter needed to be replaced. The manufacturer was not contacted. The vehicle was not repaired. The failure mileage was 134,000.