Customer Satisfaction Program (Added Customer Letter) - The 1.5 L LFV engines in certain 2016 and 2017 model year Chevrolet Malibu vehicles may have a pre-ignition condition that requires immediate repair. This condition may cause the engine to perform poorly, misfire, run rough, and/or excessively consume oil. It may also illuminate the vehicle?s service engine light. Over time, if not repaired, the condition can damage the vehicle?s pistons and engine. Replace pistons.