Faults:

Thanks to everyone for posting the messages about the window problem. It's really helped a lot to know that we're not alone in having that window regulator problem.

Even more, thanks for the information about where to get a replacement window regulator and a quick explanation about how to get into the door panel to make the repair (I can do repairs on mechanics, but getting into a door or dashboard is daunting to me).

So far, we've had only one window go out -- but we have two, 2001 Le Sabres. I may stock up on the window regulators. :)

Also, one of the cars has a problem with the LED lighting on the dashboard -- but I think I know why they go out (voltage spikes) and will look into limiting the voltage so it can't happen (The LEDs should last 10 times longer than the car.)

Faults:

ALL 2001 full-sized Buicks have defect plastic window regulators which fail (mostly all power windows) with even infrequent use. Rear windows seem to fail first even if never used. According to the NHTSA database, this is a known defect in this vehicle reported by 21 of 29 owners reporting on the 'carsurvey.org' website. It costs $375-$500 to have the dealer replace this part on EACH window. There is no recall or extended warranty on this known bad part and the mfr. has not redesigned it so multiple failures are quite possible. Also, a high number of owners report tie-rod failures on this vehicle, so have them inspected regularly. Too bad this stupid window defect makes ownership excessively expensive. If you don't mind broken power windows or are willing to disconnect the motors, this could be a good car to own. Service Bulletin 3483 01/2001 simply says to replace the regulator.

General Comments:

Otherwise, this has been a quiet, smooth, powerful, comfortable, economical, and efficient auto to own. Almost as reliable as the 1991-99 Park Avenues, but wider and more expensive. Elderly drivers average 27-28 MPG in suburban driving. The power train is essentially unchanged since 1988 and one of the best ever made in the USA. Like all modern overhead valve engines, the timing belt must be changed every 65,000 miles to prevent destruction of the valve train and pistons if it fails. This is probably one of the more reliable sedans from the Big-Three, but less reliable than comparable cars from Japanese owned car makers. This is my mother's fourth and probably last Buick. Next time we'll get a used Lexus.