52 14... Replacing heating element for left or right front seat

Necessary preliminary work: 

• Remove seat fabric. See REMOVING SEAT COVER FOR DRIVER'S SEAT  or REMOVING SEAT COVER FOR FRONT PASSENGER SEAT .
• Remove BACKREST COVER .

Check new foam section: 

• No obvious damage or material defects
• All trim wires present in foam
• No bubbles in foam section
• No dirt/contamination on foam or residual foam
• Pay attention to foam section on left and right

Check new heating elements: 

• No obvious damage or material defects
• All tear-off film pieces presents
• Note variant by examining label on cable

Stick on bead parts at top (1) and bottom (2): 

• Detach adhesive film from left or right bead parts in succession and stick on heating elements along bead part edges.
• Press down evenly in outwards direction

Fig 1: Sticking On Bead Parts At Top And Bottom

Courtesy of BMW OF NORTH AMERICA, INC.

Stick on bead parts (1): 

• Detach adhesive film from left or right bead part (1) and stick on heating element along bead part edges.
• Press down evenly in outwards direction

Fig 2: Sticking On Bead Parts

Courtesy of BMW OF NORTH AMERICA, INC.

Check laying of heating elements: 

• Heating elements laid without folds
• Heating elements correctly positioned
• All bonding surfaces stuck on