BMW issued a recall on the 5 SERIES6 SERIES, and 7 SERIES models

On certain vehicles, the rear shock lower bushings may not have been manufactured to specification (improper vulcanization of the bushing). Depending on vehicle operation and temperature conditions, this could lead to a loosening of the bushing within its housing. Over time, the bushing could continue to loosen and may eventually separate from its housing. Correction: Dealers will replace the rear strut assemblies.