What is the reason for the loud noise from the wipers of a new car?

[McNorah]

The loud noise from the wipers of a new car is caused by an incorrect fitting angle. The solution to this issue is to adjust the fitting angle between the wiper arm and the windshield. Wipers are essential accessories installed on the windshield, designed to clear rain, snow, and dust that obstruct visibility. Features of wipers include: 1. Corrosion resistance; 2. Strong water repellency and excellent adhesion to the windshield; 3. Heat, cold, and acid/alkali resistance. Methods for maintaining wipers: 1. Always use windshield washer fluid when operating wipers on sunny days—avoid dry wiping; 2. Manually remove any stubborn or hard debris on the glass; 3. Lift the wiper blades when washing the car or performing routine cleaning, holding them by the spine; 4. In winter, use an ice scraper to remove ice from the windshield before using the wipers.

[DelNora]

I also encountered very noisy wipers when I first got my new car and specifically researched this issue. There are several main reasons for wiper noise in new cars: The most common is poor-quality wiper blades, where some batches have rubber that's too hard or doesn't match the windshield curvature. Second is improper installation, where uneven spring pressure from the wiper arm causes the rubber to rub at an angle. It could also be residue from protective wax or tinting chemicals left on the glass during delivery, creating an oily film. Additionally, cold winter temperatures temporarily harden the rubber and cause noise. I recommend these four steps first: Thoroughly clean the glass with alcohol wipes to remove any oily film, check if the protective cover on the wiper blades was removed, test the sound after spraying windshield fluid to lubricate, and finally return to the dealership to have technicians adjust the wiper arm angle - this usually solves the problem. Don't rush to replace parts on a new car; prioritize checking installation issues first.

[NovaRose]

Talking about wiper noise from a repair shop's perspective. Ninety percent of new car wiper noises are due to physical friction. I often encounter three common cases: if the contact angle between the rubber blade and the glass deviates by more than 5 degrees, it causes squealing, which requires specialized tools to adjust; inadequate rigidity of the matching wiper arm leads to vibration resonance at speeds over 60km/h; uncleaned factory glass coatings create high-frequency noise when the wipers operate dry. The priority for handling should be—first clean the glass and check the smoothness of the blade edge, then perform a water spray test to observe if the water trails are even, and finally have the workshop use a torque wrench to calibrate the pressure spring. Avoid using abrasive cleaners on the glass as they can worsen wear. New car owners are advised to return to the dealership for a free adjustment.

[AdalynnMarie]

As a car enthusiast, let me share some details about car usage. New car wiper noise often stems from improper operation: not removing the protective film strip before using the wipers after purchase, leaving adhesive residue when removing the film; parking under direct sunlight causing rubber deformation, especially when the dashboard is exposed to summer sun; high-pressure water jet impact during car washing displacing the wipers; most crucially, usage habits – many people immediately turn on the wipers to dry-wipe dust off the windshield upon entering the car. The techniques I've discovered are: always spray windshield washer fluid to lubricate before using wipers, wipe the rubber blades with rubber conditioner monthly, and try to park away from direct sunlight. If noise already exists, lightly sand the blade edge with 2000-grit sandpaper then soak it in silicone oil – the effect is quite noticeable.