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

On certain vehicles equipped with heated seats, excessive contact with the seat backrest side bolster upon entering and exiting the vehicle may damage the heating mat located in this area. If this happened, the seated occupant may experience excessive heat in this location. The heating mat could damage, or melt a small hole in the lower portion of the backrest's outboard side bolster. If this were to occur, an electrical/melting smell or small amount of smoke would be noticeable. In some cases, the small hole in the backrest's side bolster could damage the seated occupant's clothing. In rare instances, this could lead to a minor or superficial skin injury. Correction: Dealers will modify the seat heating circuit for the front seat backrests.