52 15 055 Removing and installing/replacing lumbar support on front seat

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2016 BMW 328i xDrive, 2016 BMW 328d xDrive, 2015 BMW 328i xDrive, 2015 BMW 328d xDrive, and 2014 BMW 328i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work:

Remove REAR PANEL ON FRONT SEAT

Detach backrest cover from backrest frame in marked area.

Fig 1: Detaching Backrest Cover From Backrest Frame

G10097579

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect plug connection (1) on lumbar support pump.

Unlock and disconnect plug connection (3) on valve body.

Release cable strap (2).

Installation note:

Completely remove remnants of cable ties.

Replace faulty cable straps.

Version with backrest width adjustment only.

Unlock and disconnect additional quick connector (4).

Fig 2: Plug Connection, Cable Strap And Additional Quick Connector

G10097580

Courtesy of BMW OF NORTH AMERICA, INC.

Detach valve body (2) from spring wire.

Detach lumbar support (3) from spring wire.

Press padding forward a little.

Carefully pull out lumbar support pump (1) downward with lumbar support (3) and valve body (2).

Fig 3: Pulling Out Lumbar Support Pump Downward With Lumbar Support And Valve Body

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Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Attach lumbar support on second and fifth wire from the bottom.

Fig 4: Attaching Lumbar Support On Second And Fifth Wire From Bottom

G10097582

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Check lumbar support at top (1) and bottom (2) for damage.

Air hoses (3) must not be kinked.

Fig 5: Lumbar Cushion At Top And Bottom With Air Hoses

G09851363

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Run a function check.