What are the causes of brake noise in Jetta?
2 Answers
Jetta brake noise is caused by: 1. Rust on brake discs or brake pads; 2. New brake pads; 3. Excessive wear of brake discs and brake pads; 4. Incorrect installation or mismatched model of brake pads; 5. Use of inferior or overly hard brake pads; 6. Abnormal brake caliper or lack of brake fluid; 7. Foreign objects between brake drum or disc and shoe. Taking the 2019 Jetta as an example, it is a compact car with body dimensions of: length 4501mm, width 1704mm, height 1469mm, wheelbase 2604mm, minimum ground clearance 109mm, and body weight 1120kg.
I've been repairing cars for over ten years. A common issue with Jetta's brake squealing is when the brake pads wear down to their limit, causing the metal wear indicator to scrape against the rotor and make noise. Alternatively, brake rotors can accumulate dust or small stones, especially after driving on rural gravel roads, where these debris get stuck between the pads and rotors, causing friction. After rain, brake rotors may rust, leading to noise during the first few brake applications, but this usually disappears after driving a few hundred meters as the rust wears off. Sometimes, the caliper pistons may stick, causing the brake pads to drag on the rotor, so it's essential to check if the pistons move freely. I recommend regularly inspecting the brake pad thickness visually, checking every 10,000 kilometers or so, or replacing them promptly if you hear any unusual noises. Ignoring this issue can lead to more severe damage to the brake rotors, significantly increasing repair costs. From a safety perspective, brake noise can affect confidence in braking, especially during emergency stops, potentially increasing stopping distances. Developing smooth driving habits and avoiding sudden braking can help reduce wear. Remember to choose high-quality branded parts and ensure the pads are securely fixed during installation to minimize the occurrence of noise.
