What Causes the Noise When Rolling Up/Down the Windows of a New Car?

[Allie]

There are two reasons for the noise when rolling up/down the windows of a new car: one is the noise from the window regulator guide rail, and the other is a malfunction in the window regulator components. Noise from the Window Regulator Guide Rail: The main causes of noise from the window regulator guide rail are loose screws or the guide rail being too dirty and needing lubrication. After cleaning the guide rail, applying grease can help alleviate the issue. Malfunction in Window Regulator Components: If components of the window regulator, such as the cables, guide rails, or sliders, are damaged, it usually requires replacing the entire window regulator assembly, as individual components are rarely replaceable.

[GiselleDella]

I just picked up my new car recently and also encountered a creaking sound when rolling the windows up and down, which is quite concerning since such issues are uncommon in new cars. The reasons could be varied—for instance, there might be dust or tiny debris accumulated in the window tracks, causing friction and noise with each movement. Alternatively, the tracks might lack sufficient lubricant, and as new parts need to break in, they start making noises over time. Another possibility is that the window regulator motor isn’t properly installed or has loose screws, leading to clunking sounds during operation. I’d suggest first inspecting the window gaps yourself, wiping the track entrances with a soft cloth and some cleaner, then applying silicone-based lubricant spray. If the issue persists, don’t delay—head straight to the dealership for a check-up. New cars are under warranty, so repairs are usually free. Ignoring it long-term could wear down the glass or regulator mechanism, affecting overall longevity, so addressing it early prevents bigger troubles.

[Bob]

As someone who frequently tinkers with cars, I've encountered window rattling issues several times. When a new car develops lifting noises, it's mostly due to oversights during manufacturing, such as improperly installed sealing strips allowing dust and moisture to enter the gaps, eventually causing friction noises; or defective dustproof strips in the tracks that cause the glass to knock against plastic components during operation. For DIY solutions, I first remove the window rubber strips to clean the gaps, use an air gun to blow away debris, then apply specialized window track lubricant. If the noise persists, check whether the window regulator fasteners are loose or if the motor is malfunctioning. During the warranty period, you can claim for replacement, provided you haven't damaged the original parts. Regular inspections can prevent noise from worsening and ensure smooth operation of the window system.

[OSabrina]

I believe that window rattling is not only annoying but also poses a potential safety risk. When there's noise during the operation of new car windows, it could be caused by internal motor failure or circuit issues, such as unstable current leading to jerky movement and noise. If not addressed promptly, the window might get stuck halfway, which could be dangerous in emergencies where the escape route cannot be opened. Common causes include clogged lifting tracks due to contaminants or rust from water ingress, indicating inadequate anti-corrosion treatment in new cars. I recommend immediately stopping manual operation to reduce friction damage and then seeking a professional technician for diagnosis as soon as possible. Most new cars are covered by warranty, making free repairs more cost-effective. Avoid DIY attempts on complex components to prevent accidental damage to the electrical system, which could compromise driving safety.