What causes the sound of a sticky plastic bag when the car is running?
2 Answers
It may be caused by a stone stuck in the tire. Check for foreign objects in the tires before driving. Below are some tire maintenance tips: Regularly check tire pressure: Inflate underinflated tires promptly to maintain consistent tire pressure. Otherwise, it can lead to rapid wear of low-pressure tires, increased driving resistance, higher fuel consumption, and issues like directional deviation. Avoid hitting obstacles: When driving at high speeds, hitting obstacles such as potholes can cause severe compression deformation between the obstacle and the tire at the rim flange. This may lead to broken tire cords, air leakage forming bulges, and in severe cases, sidewall rupture or sudden tire deflation. Regular wheel alignment: Proper wheel alignment ensures normal vehicle handling and improves tire performance. Poor wheel alignment can cause irregular tread wear and shorten tire lifespan.
I often hear a rustling sound like a plastic bag when driving, especially louder on bumpy roads or during turns. This is usually due to worn bushings in the suspension system. When the rubber ages and hardens, it rubs against metal parts, creating a squeaking noise. It could also be caused by loose plastic underbody panels, which flap and make a flapping sound due to wind resistance vibration at high speeds. Alternatively, if small stones or debris are stuck in the tire area, they can generate noise by rubbing during rotation, though this is relatively rare. I recommend checking if the underbody panels are secure after parking by shaking them by hand. If the noise is more noticeable when the car is cold and lessens after warming up, it’s likely a bushing issue, and you should visit a professional repair shop for replacement as soon as possible to avoid suspension damage. Driving carefully to reduce bumps can temporarily alleviate the noise, but a long-term fix is necessary.
