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Kenny, BMW Technician
Category: BMW
Satisfied Customers: 1126
Experience:  BMW Master Certifed level 1 Technican
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First rightt rear window motor, now months later the left

Customer Question

first rightt rear window motor, now months later the left rear window motor both have same issue.
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer:(###) ###-####bmw 325i auto
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: fix myself. tested switch and motor. Both good
JA: Anything else you think the mechanic should know?
Customer: no
Submitted: 1 year ago.
Category: BMW
Customer: replied 1 year ago.
Window motor only moves in 1 inch increments. Motor and switch tested good. Relay is prematurely opening. Where is relay?
Expert:  Kenny replied 1 year ago.

Sounds like the window has lost initialization. Re-initializing the windows should resolve this. This is a common thing on your vehicle. How to do this move the window all the way closed once the window is closed from the window switch at that door with the door closed hold the window switch up for 17 seconds with the engine running.