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Power Window Switch Replacement
 
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Pelican Technical Article:

Power Window Switch Replacement

Nick Czerula

Time:

2 hours2 hrs

Tab:

$100

Talent:

***

Tools:

Plastic prying tool

Applicable Models:

BMW Z4 Convertible (2003-06)
BMW Z4 Coupe (2006)

Parts Required:

Window switches

Hot Tip:

Be careful not to damage door panel when removing

Performance Gain:

Proper power window function

Complementary Modification:

Clean under your door panel

BMW Z4 power windows are controlled via electronic switches that send request signals to the general module (GEM), which in turn drive a D/C electric motor. The electric motor moves the window up or down using a window regulator. The window regulator is the mechanical track and guide for lifting the door window glass. The regulators are constructed of metal rails with a cable driven track.

Window switches fail and wear out over time, leaving you with a non-functioning window in one or both directions. If you are left to deal with any of these problems, this tech article will show you how to replace the seat switches.

When testing window motors, be sure to keep yourself and your clothing clear of the seat, as it could move. You don't want to get snagged or pinched while working on it.

Interior trim pieces and switches in BMW Z4 cars are made of preformed hard plastic. Plastic clips or metal screws are sometimes used to hold them in place. To avoid marring the trim, work with a plastic prying tool or wrap a screwdriver tip with masking tape before prying out trim panels, switches or electrical accessories.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve, as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The main window switch, located in the left side door panel, can control all of the windows and both exterior mirrors (red arrow).
Figure 1

The main window switch, located in the left side door panel, can control all of the windows and both exterior mirrors (red arrow).

Using a plastic prying tool (red arrow), lever the switch up at the doorjamb side.
Figure 2

Using a plastic prying tool (red arrow), lever the switch up at the doorjamb side.

Once the side of the switch closest to the jamb is slightly up, slide it out in the direction of the red arrow.
Figure 3

Once the side of the switch closest to the jamb is slightly up, slide it out in the direction of the red arrow. Pull the window switch assembly straight up to remove it.

Flip the window switch over.
Figure 4

Flip the window switch over. Then disconnect the mirror control connector by pressing the release tab and pulling it straight out. Then disconnect the power window switch electrical connectors by pressing the release tab (red arrows) and opening the lever. Reverse the steps to install the new switch.

The passenger switch is similar.
Figure 5

The passenger switch is similar. It only controls the passenger window. Using a plastic prying tool (red arrow), lever the switch up at the doorjamb side.

Flip the window switch over.
Figure 6

Flip the window switch over. Then disconnect the electrical connector (red arrow) by pulling it straight out. When replacing, be sure the metal clips (green arrows) are not stuck in the door panel. If they are, the new switch will not install flat. Reverse the steps to install the new switch.

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Page last updated: Wed 12/7/2016 03:00:01 AM