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Home >> BMW >> 2018 >> M4 2D Convertible, Automatic DCT Trans >> Repair and Diagnosis >> Body & Frame >> Seats >> Seats - Repair -- M4 (F82 & F83) >> 52 16 Front Seat Upholstery And Components (Convertible) >> Removing and installing/replacing adjusting unit for backrest width adjustment on left or right front seat (Convertible)

Removing and installing/replacing adjusting unit for backrest width adjustment on left or right front seat (Convertible)

Necessary preliminary tasks: 

Detach backrest cover on left and right from metal retainer.

G10047097Courtesy of BMW OF NORTH AMERICA, INC.
G10047098Courtesy of BMW OF NORTH AMERICA, INC.

Unclip soft-top bow (1) on left and right and detach from backrest frame.

Unclip cover in direction of arrow.

Installation note: 

Remove metal clamps (1) left and right on the cover.

Bend up metal clamps and insert back into the cover.

Clip metal clamps (1) with cover into the slot on the seat mechanism.

Guide lugs may not be broken.

Replace faulty cover if necessary.

G10049113Courtesy of BMW OF NORTH AMERICA, INC.

Detach backrest cover from metal retainer.

G10047100Courtesy of BMW OF NORTH AMERICA, INC.

Detach backrest cover from metal retainer.

G10047101Courtesy of BMW OF NORTH AMERICA, INC.

Detach lower section of welt from backrest frame.

G10047102Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Remove valve unit (2) in direction of arrow.

G10211277Courtesy of BMW OF NORTH AMERICA, INC.

Cut open cable strap (1).

Installation note: 

Attach cable strap (1) over fifth wire.

G10211278Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect cable strap (1 to 3).

Installation note: 

Attach cable strap (1) below first wire.

Attach cable strap (2) over third wire.

G10211279Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

G10211280Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

G10211281Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

NOTE: Valve unit, hoses, pump and air cushion form a single unit and can only be replaced completely.

Feed out backrest width adjustment completely from the seat mechanism towards the rear.

G10211282Courtesy of BMW OF NORTH AMERICA, INC.
  1. Valve unit
  2. Air cushion with holder, left
  3. Pump
  4. Air cushion with holder, right
G10211283Courtesy of BMW OF NORTH AMERICA, INC.