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Rear Window Regulator Replacement
 
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Pelican Technical Article:

Rear Window Regulator Replacement

Nick Czerula

Time:

3 hours3 hrs

Tab:

$200

Talent:

****

Tools:

Plastic prying tool, door panel clip tool, flathead & Phillips screwdriver, 10mm wrench, T20, T30 Torx drivers

Applicable Models:

BMW X5 (2000-06)

Parts Required:

Window regulator, Vapor barrier, Vapor barrier seal, door panel clips, plastic window retainers

Hot Tip:

Have door panel trim clips on hand in case they break when removing

Performance Gain:

Functioning power window

Complementary Modification:

Replace vapor barrier

The window regulator is the mechanical track and guide for lifting the door window glass. The front door of your vehicle has a window regulator with two rails, while the rear door only has one rail. They each have an electric motor and function similarly. The regulators are constructed of metal rails with a cable driven track.

The electric window motor can be serviced separately; however they do not fail that often. You will need to swap the electric motor over to the new window regulator you are replacing. The electric motor can be installed in any position, as it does not have a mechanical stop. Do not worry about the installation orientation when reinstalling.

The most common failure in the power window system is the window regulator. The cables fail, usually at the ends close to the motor. There are springs to absorb the tension when the window reaches its end stops, but over time the plastic in this area will fail.

When replacing a window regulator, it is important to inspect the window guide and seal. The seal can wear and this increases friction on the window when going up and down, which stresses the window regulator. This can lead to premature wear of your window regulator and repeat failures. If needed, replace this component also.

If your window is loose, inspect the plastic retaining clips, as they may be worn out. If your window seems to go up crooked, give it a push and a pull. If it moves a few inches in any direction, the clips may be faulty. Inspect them. If they are not worn out or broken, replace the regulator.

Remember that your car may have been serviced before and had parts 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. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve as they grow older. 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.

In this tech article I am going to show you how to replace the rear window regulator. I get a lot of questions on how to lower the window when the regulator is faulty. This tech article will show you how to lower the window glass with a faulty regulator. If you can lower your window, skip the steps involved with removing the motor from the regulator.

Disconnect the battery negative terminal. See our tech article on battery replacing.

Remove the vapor barrier by carefully cutting (inset) away the sealing adhesive.
Figure 1

Remove the vapor barrier by carefully cutting (inset) away the sealing adhesive. Slowly pull the vapor barrier with one hand and cut the sealing adhesive with a sharp knife or razor until the vapor barrier is separated from the door. If the vapor barrier is torn, replace it.

Next, remove the three T30 Torx screws holding the window motor to the regulator (green arrows).
Figure 2

Next, remove the three T30 Torx screws holding the window motor to the regulator (green arrows).

Then remove the window regulator motor electrical connector by squeezing the tab to release it.
Figure 3

Then remove the window regulator motor electrical connector by squeezing the tab to release it. Then pull the connector off the window regulator motor.

Rotate the window regulator motor down until the window regulator motor (green arrow) clears the tabs (red arrow) on the window regulator.
Figure 4

Rotate the window regulator motor down until the window regulator motor (green arrow) clears the tabs (red arrow) on the window regulator. Before separating the window regulator motor from the window regulator, support the window glass with one hand and remove the window regulator motor with the other hand. The window glass will now move freely.

Lower the glass down until the bolt is accessible through the opening (green arrow) in the window regulator.
Figure 5

Lower the glass down until the bolt is accessible through the opening (green arrow) in the window regulator. Now loosen the 8mm bolt. You do not have to take it all the way out. Just loosen it enough so the window glass can be moved separate from the window regulator.

Now separate the window glass from the regulator.
Figure 6

Now separate the window glass from the regulator. Do not let the window glass fall in the door or be lowered all the way down. It may come out of the window tracks. Instead, evenly push the window glass up to the fully closed position.

Once the window glass is in the fully closed position, secure the window glass up with masking tape making sure that the window glass will not fall.
Figure 7

Once the window glass is in the fully closed position, secure the window glass up with masking tape making sure that the window glass will not fall. If the window glass falls it can break or fall onto your hand while you are working on the window regulator.

Remove the three 10mm nuts holding the window regulator in place (green arrows).
Figure 8

Remove the three 10mm nuts holding the window regulator in place (green arrows). Once the 10mm nuts are removed push the regulator back into the door.

Now rotate the window regulator so it can be removed through the opening in the door.
Figure 9

Now rotate the window regulator so it can be removed through the opening in the door. Reverse the removal steps to install a new regulator in the door. When reinstalling the window regulator motor on the window regulator, you may need to wiggle or rotate the motor a little so the motor drive engages the regulator. The vapor barrier adhesive will stick better if warmed with a heat gun. Be careful not to get the vapor barrier too hot or you can melt it. The rear window will need to be reinitialized for one touch to work. When the vehicle battery is disconnected or the power window components have been replaced, you have to initialize the power windows. A sign that you may need to initialize the window is your one touch window feature is not working as expected. Use the following steps to initialize your power windows: Close the window. Hold the window switch until the window glass reaches the top of its travel. Open the window. Hold the window switch until the window glass reaches the bottom of its travel. Activate one touch operation to close the window. Once the window closes, confirm that one touch operation works in both directions of the window glass travel. If so initialization is complete. If not, repeat the steps.


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Page last updated: Fri 12/9/2016 02:49:05 AM