N192210220 - Special Coverage Adjustment - Certain vehicles may have a condition that could cause bearings in the engine supercharger to emit an excessive rattling or knocking noise that is especially prominent at idle. (A low-level mechanical thrumming noise from the supercharger at idle by contrast is normal in these vehicles and does not indicate a problem). The excessive noise at issue here will typically go away when the engine RPM is raised slightly above idle. However, if left uncorrected, the problem, over time, may lead to contamination of the lubricating grease and cause the bearing to squeal. If left unaddressed, the bearing may overheat and can cause supercharger seizure or a no-start condition. Dealers are to replace the supercharger as necessary. The repairs will be made at no charge to the customer.
