Checking the BMW Window Regulator
If you go back to the time when you have to use the hand crank to just roll the windows up and down, you'll see how much difference a properly working window regulator and motor makes. You just have to push the button to activate the power windows. Unfortunately, your BMW window regulator may go bad. When it does, your power windows won't work properly. There are some hints telling you that the power window malfunction has something to do with the regulator. To help you figure it out, here's short guide for diagnosis and troubleshooting:
It takes several presses for the window to roll down.
If everything is well with the power windows, all it takes is just a push of a button for the car window to slide up and down. If you have to make multiple presses or attempts, this is a sign of impending power window trouble. One of the things you have to check is the window motor and regulator to see if this is causing the problem.
Rolling up the window and sliding it down takes a while.
Your power windows may still be working, but if it takes a while before the glass rolls down and slides up, the window regulator may be on its wat out. You may have to replace the motor or regulator. Before you do, you have to check them and test other mechanisms to rule out other underlying cause or possible culprits for the slowdown of the power window operation.
The car window won't stay up.
The windows should stay up when they're closed. However, if the windows won't stay up or you have to move it to close, one of the things that need to be inspected is the window regulator. Also see if the motor is working. You may have to replace the whole assembly.
The window won't move even if there's a clicking sound from the fuse box.
As you press on the switch, you hear some clicking that seems to be coming from the fuse box. However, the window still won't budge. In this case, you have check the fuse firsst. If you push the button and hear some humming sounds from the motor but the window isn't moving, the problem is mostly likely the regulator. However, if the button is pushed and there's no sound from the motor, this could mean that power isn't getting through the motor or the motor itself has to be replaced.
The window closes but it's crooked.
If things are okay with the power windows, they should close smoothly and evenly. However, if you notice that they're somewhat crooked, like one side is higher, you may have a damaged regulator. See if you need to replace the whole assembly. You, of course, have to rule out other causes first.
One of the windows won't roll up or slide down.
Usually, when power windows fail, one of the things you have to check is the fuse or relay. However, when the problem is isolated to just one car window, it's more likely that the problem has something to do with the window motor or switch of the particular door. Another possibility is that the window regulator has failed.
Diagnosing the problem
Before you replace the regulator or any mechanism, first try the switches (the master switch and all the other switches) to see if the problem lies with a bad power switch and not the motor or wiring. Also check the fuses first before you disassemble the door panel and inspect the mechanisms. As you get access to into the door, check the wiring from the motor and the control panel to see if there are indications of wear or disconnection. If you see no problem here, check the regulator and motor.
OES Genuine Window Regulator
With an OES Genuine window regulator, nothing can ever go wrong. Stamped with the authentic OE replacement label, this window regulator is as good as the original one. Offering a direct fit, this window regulator is carefully measured so that it matches the dimensions of its mounting point in the car. Because it is made from top-grade and heavy-duty materials, it does not deteriorate or break easily. The window cords are made of strong, yet flexible steel that can resist pressure and tension even when being pulled often. The stainless steel pulley cannot be ruined by corrosion; therefore it can function efficiently for years. Best of all, this regulator includes well-insulated electrical cables. These cables don't tear easily and the rubber coating doesn't strip off. Thanks to that, short circuits and grounds that can cause severe damage in the power window can be prevented. Window regulator from OES Genuine is sold individually, and it is backed by extended limited warranty plans.
Replacement Power Window Regulator
Why is it best to choose a window regulator from Replacement? It's because Replacement guarantees that its window regulator is manufactured under OE standards to ensure 100% quality. Made from durable and premium materials, this regulator can be at par with or even exceed the quality of the original device found in the car. The aluminum and stainless steel regulator body is what makes this component last for a long time. The anti-corrosion properties of these special metals are excellent. Even the bolts and drive gears do not succumb to rust easily. Sold with all the hardware and connectors, it can be fitted in the car in a matter of minutes. Installation is effortless because of its direct fit and precise size. This window regulator from Replacement provides nothing but comfort and convenience by helping the power window system function to its full potential. Aside from the quality, a one-year product warranty is also included with every purchase of this heavy-duty regulator from Replacement.
Dorman Window Regulator
Carefully crafted using the Dorman standard for performance and quality, this window regulator can survive in the car for a really long time. That's because Dorman makes sure that the materials used in its regulators are nothing but top grade and durable. Special metals like the stainless steel and aluminum are used in the window drive gears and glass panels to ensure that they don't easily get corroded. Has a rigid design, this tough regulator can also withstand vibrations and shocks produced whenever the vehicle is moving. There's really no need to worry about the regulator getting loose and moving out of place. With every purchase of this window regulator, a tube of dielectric grease is included. This lubricant is specially made for electric-powered wire connections to enhance the flow of electricity. It also makes it easier for the cables to slide into the plug boot of the regulator. Also comes with the rivet fasteners, this Dorman regulator is very easy to install. The best part, Dorman backs its window regulator with a lifetime limited warranty.