Is Rust on Car Brake Pads a Sign of Water Damage?
2 Answers
Rust on car brake pads does not necessarily indicate water damage; washing the car or rain can also cause brake pads to rust. Here are solutions for dealing with rust on car brake pads: 1. If the brake disc has slight rust, it can usually be removed through normal braking. The principle is that the friction between the brake pads and the brake disc will remove the rust. Applying the brakes several times can make the brake disc shine like new. 2. When the brake disc has severe rust, normal braking may not be sufficient to remove the rust effectively. Severe rust on the brake disc can cause uneven surfaces, leading to issues such as steering wheel vibration and unusual noises when braking. In such cases, it is best to take the car to a 4S shop, remove the brake disc, and sand the rust off with sandpaper. After ensuring the brake pad surface is normal and reinstalling everything properly, conduct a road test. If there is no noticeable vibration, the car can be used normally.
When I first saw rust on the brake pads, I immediately thought it was due to water immersion and rushed to get it checked. A friend explained that since they're made of metal, brake pads can rust from rainwater or being parked in damp underground garages—it doesn't necessarily mean they've been submerged. Normally, after a few brake applications while driving, the rust will wear off. Now, after every car wash or rain, I make it a habit to check the brake pads. Minor rust spots don't worry me, but if the entire pad is rusted and affecting braking performance, that's when I'd suspect actual water immersion. Paying attention to parking locations to avoid prolonged exposure to humidity can help reduce this issue. Regular brake maintenance at the shop is also crucial to prevent minor problems from escalating.
