The delivery stop has been lifted for certain affected M vehicles produced from May 12, 2016 through July 4, 2016. While the delivery stop has been lifted, customers must sign a disclosure prior to delivery acknowledging the premature wearing of the rear axle differential. A copy of the disclosure form is attached and must be maintained in the customer?s deal jacket. Body of Disclosure:In the course of ongoing quality analysis, BMW has discovered that the disc in the rear-axle differential in the vehicle reference above wears out prematurely, causing loud noises. The remedy parts for the repair are not yet available. BMW of North America (?BMW NA?) will notify you when parts are available and advise you to schedule an appointment with your local BMW dealer to have the repair performed free of charge to you. To ensure that we have your most up-to-date contact information, please complete the information below. If you change your address before you receive the notice from BMW NA, please register your vehicle and update your contact information at http://www.bmwusa.com/myBMW.