Necessary preliminary tasks

WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 335xi, 2010 BMW 335i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Heating elements 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 mat:

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

Guide cable for backrest heating through foam hole.

Stick on main section (1):

Pull adhesive film pieces off main section (1) and stick to upper edge of main section foam until flush

Stick on bead section (2):

Pull adhesive film pieces off bead section (2) and stick on heating mat along bead section edges.
Press down evenly in outwards direction

Fig 1: Identifying Main And Bead Section
Courtesy of BMW OF NORTH AMERICA, INC.

Guide cable for seat heating through foam hole.

Stick on STV heating mat (1):

Pull off adhesive film and stick to rear foam edge until flush

Stick on bead section (2):

Pull adhesive film pieces off bead section (2) and stick on heating mat along bead section edges.
Press down evenly in outwards direction

Stick on main section (3):

Pull adhesive film pieces off main section (3) and stick to upper edge of main section foam until flush

Fig 2: Identifying STV Heating Mat With Main And Bead Section
Courtesy of BMW OF NORTH AMERICA, INC.

Check laying of heating mats:

Heating mats laid without folds
Heating mats correctly positioned
All bonding surfaces stuck on
NOTE: Carry out FUNCTION TEST