CATALYTIC CONVERTER ISSUE
The E51 is produced with 2 Catalytic Converters on each side (4 in all). Nissan did a recall in Japan to alter the fueling of the engine to help stop the main catalytic converters failing and blocking the secondary converters which can cause major damage to the engine. It is STRONGLY ADVISED that owners have the secondary catalytic converters removed in order to stop this expensive fault from occurring. The parts that need removal are the cone shaped converters below the front seat area.