Windows only work one at a time

[e30singapore]

I recently purchased an 89' E30 316i, in fairly good shape. There are some rust spots and the car vibrates and has lots of road noise but I plan it to work on all problems as I go along. I have little to no experience in the garage but I read the E30 is one of the best places to start learning.

I realized that the windows on the car only works one at a time, if I try to open or close 2 together then the windows just stop moving. Also both windows move really slowly.

I've tried googling but no one else seems to have this problem. Is this a sign of failure somewhere else in the car?

[Dmitry at Pelican Parts]

Welcome to the Forum - you'll be able to find a ton of really great and useful info between our DIY tech articles and the knowledgeable members that we have here. I've attached a DIY tech article on addressing this issue. If you need further assistance, post a Comment just below the article and someone will get back to you. Best of luck!

Replacing the Window Regulator and Motor on Your BMW


-Dmitry

[Luccia at Pelican Parts]

Have you ever replaced any of your regulators/motors? I'd pop off the door cards and inspect inside while you roll them up/down one at a time. Then do this, but with both. Could be related to strain on the system and possibly one or both on their way out. Nick might also have more useful info for you so click on the link above that Dmitry posted and post your issue in the Comments & Suggests section.