51 14... Instructions for attaching number/letter designation combination: Removing

Coat nylon string or strong yarn with tensides (e.g. washing-up liquid).

Cut through adhesive layer and remove model designation (1) from rear lid (2).

Remove remainder of adhesive layer with adhesive remover (sourcing reference: BMW Parts Service).

Fig 1: Identifying Model Designation And Rear Lid

Courtesy of BMW OF NORTH AMERICA, INC.