Tl* the contact owns a 2005 infiniti qx56. while traveling 15 mph, the vehicle would not accelerate over 15 mph and the rpms would not rise above 2000. the vehicle was taken to an authorized dealer where the contact was informed that the throttle body would need to be replaced. the vehicle was repaired yet the failure recurred. the contact stated that the throttle body was replaced twice prior to the failure. the vin was not available. the failure mileage was 77,000 and the current mileage was 85,000.