Alfa 147 Power Window Failure: Common Regulator Issue

I had a similar issue with my Alfa 156 (2006 diesel), quite a typical problem with power windows on these models. Since I have some experience working on cars, I first thought it was the window regulator, but it turned out the power window switch was the culprit. The window control unit completely stopped responding, and the window got stuck. After taking it to a workshop, they diagnosed a faulty switch in the driver side door panel. The repair cost was 200 Euro including parts and labor. The window regulator motor itself was actually fine. Before you start replacing parts, it would help to know: Does the window make any noise when you press the switch? Can you hear the power window motor trying to work? Do other windows operate normally from both their local switches and the driver control panel? Have you noticed any intermittent operation before complete failure? These symptoms can help pinpoint whether its the window regulator, the motor, or just the switch itself. The repair process is straightforward once the exact issue is identified, but proper diagnosis saves time and money.

Had my last service at 112000 KM (about 3 months ago). The window started making grinding noises when operating it, and yes, I can hear the motor trying to work. The other windows function perfectly from both their local switches and the main driver door panel. Looking at the symptoms you described, this really points toward the window track being worn out rather than a switch issue. My window mechanism actually showed signs of sluggish movement for a few weeks before failing completely. The power windows on other doors work fine which makes me think the main control unit is okay. Going to check the window regulator next weekend as it seems the most likely cause based on your feedback. The grinding noise matches what you mentioned about regulator issues.

The grinding noise you describe is a telltale sign of a failing window regulator. Based on my previous experience with the Alfa 156, its definitely a more severe issue than the switch problem I initially encountered. Since you can hear the window motor attempting to work and other power windows function correctly, this strongly indicates mechanical failure in the window mechanism rather than an electrical fault. The regulator assembly is likely worn out or damaged, which explains the grinding sound. For reference, when I later had a similar grinding issue on my passenger side window, the repair involved replacing the complete window regulator assembly. The cost was around 320 Euro including labor. The automotive repair shop confirmed that worn guide rails and damaged rollers within the regulator were causing the grinding noise. A few tips for the repair: Get a complete window regulator assembly rather than trying to fix individual components, Check if the power window motor can be reused to save costs, While the door panel is off, inspect the wire harness for any damage This is a fairly common wear item in these models, especially at higher mileages. The window mechanism tends to deteriorate gradually, starting with the symptoms you described, sluggish movement followed by grinding noises.

Thanks for the detailed feedback. The grinding noise combined with the working motor pretty much confirms my suspicions about the window regulator being the problem. Given that the other power windows work fine from both their switches and the main panel, I agree its definitely a mechanical rather than electrical issue. Since mine showed the same progression, slow movement, then grinding, then complete failure, I will go ahead and order a complete window regulator assembly. Good tip about checking if I can reuse the regulator motor to reduce costs. My mileage is similar to when you had the issue, so it makes sense this is just normal wear and tear. Will tackle the repair next weekend and make sure to inspect the window mechanism and wiring while I have the door panel off. The 320 Euro repair cost you mentioned gives me a good baseline for parts and labor if I end up needing professional help. At least now I know exactly what needs fixing rather than replacing parts out of nowhere.