52 16 055 Replacing an air cushion for backrest width adjustment (M3 sport pack) on left or right

WARNING: This page is about a different car, the 2008 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Remove rear panel on front seat
Partially remove backrest cover . See 52 13 405 Replacing backrest cover for left or right front seat (normal / manual) , 52 15 405 Replacing backrest cover for left or right front seat (sport/manual) or 52 16 405 Replacing backrest cover for left or right front seat (M3 sport seat) .

Color coding for air cushion, backrest width adjustment:

Yellow air hose = air supply, left air cushion for backrest width adjustment
Brown air hose = air supply, right air cushion for backrest width adjustment

Unlock and detach quick connector from yellow or brown air hose (1) or (2).

Fig 1: Identifying Air Hose

Courtesy of BMW OF NORTH AMERICA, INC.

Unclip carrier for backrest width adjustment from backrest frame.

Feed carrier with air hose out of backrest frame.

Installation:

Make sure the carrier for backrest width adjustment is fitted correctly on the backrest frame.

Install air hoses without kinks.

Fig 2: Unclipping Carrier For Backrest

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Carry out function test .