BMW issued a recall on the 3 SERIES model

On certain 3-series sedans equipped with xDrive (all-wheel-drive), the front driveshaft attachment bolts may not have received adequate tightening torque during vehicle assembly. Should the fasteners loosen and fall out, the driveshaft would detach from the transfer case and/or the front differential, which could result in additional damage to the driveline, the undercarriage, and any nearby components, while the accompanying noise could startle the driver and cause a crash resulting in property damage and/or personal injury. Due to the xDrive configuration, separation of the front driveshaft would not result in a loss of vehicle propulsion. Correction: Dealers will replace the front driveshaft attachment bolts.