What Causes the Wiper Blade to Shake on a New Car?
3 Answers
New car wiper blades shaking during use is primarily due to the high friction coefficient between the wiper blade and the glass surface. This can be categorized into the following scenarios: 1. Uneven contact between the wiper blade and the glass: Some parts of the rubber blade are pressed too hard against the surface while others receive minimal pressure, leading to uneven force distribution during wiper movement and resulting in shaking at certain points. 2. Dirt or foreign objects on the wiper blade or glass surface: When the wiper passes over these areas, resistance increases significantly, causing shaking. 3. Deformed wiper arm: If the wiper arm is bent and not perfectly parallel to the windshield, it will cause shaking.
Over the years working in the repair shop, I've seen many cases of new car wiper blades shaking. The most common cause is improper installation or looseness of the wiper arm. Especially during assembly, if workers don't align the position correctly, the wiper blade tends to bounce up and down during operation. Additionally, new car windshields sometimes retain a layer of oil film or protective wax from the factory, causing the wiper blade to slip and shake when attached. My recommendation is to first clean the windshield thoroughly using neutral detergent and a soft cloth. If that doesn't solve the problem, check whether the wiper arm's mounting screws are loose. During the new car warranty period, having the dealership adjust it for free is the best approach—don't try to fix it yourself to avoid causing damage. Over time, wiper blade material aging can also cause shaking, but this shouldn't happen with new cars; it's mostly due to inadequate initial inspection. Addressing it early saves time and hassle.
The new wipers on our family car keep shaking, which is really annoying. I found out it's mainly because the wiper blade angle is too skewed or not pressing tightly against the windshield, causing them to wobble during operation. I checked it myself and realized there was dust or grease stuck on the glass surface. Spraying some windshield washer fluid and wiping it helped a lot. It's quite surprising for a new car to have this issue—maybe the pre-delivery treatment wasn't thorough enough. I tried replacing the wiper blades, but poor-quality ones can also cause this. A simple solution is to first clean the windshield and wiper blades, then gently press the wiper arm with your fingers to check for looseness. If that doesn’t work, take it back to the dealer for repairs—new cars come with warranty coverage. Remember not to scrape a dry windshield, as it can worsen wear. Visibility during rain is crucial, so don’t take it lightly.
