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

WARNING: This page is about a different car, the 2011 BMW 750xi, 2011 BMW 750Lxi, 2010 BMW 750xi, and 2010 BMW 750Lxi. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove seat fabric.
For driver's seat, see appropriate seat:
For front passenger seat, see appropriate seat:
Remove backrest cover.
For driver's seat, see appropriate seat:
For front passenger seat, see appropriate seat:

NOTE: Side heating elements (side sections) are bonded with a foam section and cannot be separated from each other without causing damage.
Foam section and heating elements must be replaced.

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: Identifying Top And Bottom Bead Parts
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: Identifying 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