What Causes Increased Car Noise?

[DiMaggie]

Here are the main reasons for increased car noise: 1. Engine mount rubber aging: After prolonged use, the rubber material of the mounts becomes brittle and loses its noise-reducing function. 2. Car tire wear: Car tires are the most prone to wear. As tires and road surfaces gradually wear and age, the noise reduction and shock absorption effects of the tires diminish, leading to increased noise. 3. Shock absorber component aging: When shock absorber parts age, their damping effect decreases, causing passengers to feel more vibrations and noise inside the car. 4. Low oil viscosity: High-viscosity oil maintains the lubrication of engine components, but after prolonged use, the oil viscosity decreases, reducing its lubrication and anti-wear properties, which in turn increases engine noise. 5. Seal aging: The external sealing of the car is crucial for noise control. If engine noise is heard from the bottom of the car during a noise source inspection, the seals should be checked.