What Causes the Noise When Rolling Up/Down BMW 3 Series Windows?
2 Answers
The noise when rolling up/down BMW 3 Series windows may be caused by hardened window seals losing their soft elasticity after prolonged use. During window operation, the hardened seals create friction and squeezing noises against the glass. This issue tends to be more noticeable in summer as aged seals expand more severely under sun exposure, increasing friction and consequently making the noise worse. Solution: In such cases, the seals should be replaced at a repair shop. Another possible cause is excessive dirt in the gap between the glass and seals, where particulate matter in the dust can create noise when rubbing against the glass. Solution: In this situation, using window lubricant for maintenance would be appropriate.
BMW 3 Series owners must have encountered the issue of squeaky window operation, right? My 2019 325Li's passenger window always makes creaking sounds when rolling up/down. After inspection, I found it's caused by aged and deformed window seals. Prolonged sun exposure plus northern China's dusty conditions harden and crack the rubber, causing friction noises. Don't rush to replace the regulator - first try buying a silicone lubricant spray (just几十RMB on Taobao) to apply between the seal gaps, and clean the guide rails weekly. If that doesn't work, check for loose regulator bracket screws or deformed cables. Never use dashboard wax spray - that stuff makes the seals expand faster!
