Vehicles equipped with a 2.5L engine may suffer from increased oil consumption as a result of improper performance of the piston rings. Severe engine damage can result if the engine is operated with the engine oil low. In extreme cases, an engine fire could result. Dealers will reprogram the engine control module (ECM). Vehicles will also be inspected for excess oil consumption. A small number of vehicles will require engine replacement. Nissan began notifying vehicle owners of the recall on June 9, 2006.