What Causes the Noise in Rearview Mirrors?
3 Answers
Rearview mirrors produce noise due to insufficient lubrication of the internal torsion spring. Below are specific instructions for adjusting the positions of the left and right rearview mirrors: 1. Left rearview mirror: It can be adjusted up, down, left, and right using an electric switch or manually. The optimal adjustment angle for the left rearview mirror is when the road environment occupies most of the mirror surface, with only 1/4 of the car body visible, and the road's vanishing point is positioned in the center of the mirror. 2. Right rearview mirror: Similarly, the optimal adjustment angle for the right rearview mirror is when the road environment occupies most of the mirror surface. Since the right rearview mirror is farther from the driver's line of sight, to ensure maximum visibility of the road environment, the road's vanishing point can be positioned at the top of the mirror, with only 1/4 of the car body visible.
After years of driving, I've experienced rearview mirror rattling issues several times, usually occurring on bumpy roads or during temperature changes. The most common causes are loose screws or aging casings – over time, plastic components tend to deform, causing "squeaking" or "clicking" sounds from friction between gaps. Another possibility is dust or small stones getting inside, creating strange noises. I recommend regularly checking the mirror's connection points by gently pushing it to test for wobbling; if loose, you can tighten the base screws with a screwdriver, but avoid excessive force to prevent damage. Long-term neglect may worsen the noise and even affect mirror adjustment functionality, posing a safety hazard especially during rain or snow when visibility is already compromised. Parking in shaded areas to minimize sun exposure can extend its lifespan. For persistent issues, professional repair shops should handle thorough maintenance when necessary.
As an enthusiast who pays close attention to automotive details, I've found that rearview mirror rattling often stems from internal mechanical issues. Particularly in models with auto-adjustment features, the small motors or gears inside are prone to noise when worn; or if the housing isn't properly sealed, accumulated dust can create strange sounds through friction during vibrations. My approach is to first clean the gaps: use a vacuum or soft brush to remove dust, then apply some lubricant to reduce friction. If that doesn't help, it might be necessary to check for loose wiring or connection points. Additionally, if the rattling is more noticeable on bumpy roads, it indicates resonance is also a factor—tightening chassis screws can alleviate this to some extent. Don't underestimate such minor issues—they can distract drivers and increase fatigue risks. Addressing them during the warranty period saves money and ensures peace of mind, avoiding costly replacement of the entire mirror assembly if the problem worsens.
