Why Are the Brakes Making Loud Noises?

[StArabella]

Here are the reasons why brakes make loud noises: 1. Rust on brake discs or pads: After prolonged parking, especially in humid or rainy conditions, rust or dirt may form on the brake discs or pads. This issue can usually be resolved by driving for a while or by applying butter or specialized lubricant to the connection between the brake pads and calipers. 2. New brake pads: New cars or recently replaced brake pads may produce similar noises. New brake pads and discs require a break-in period, during which such noises are normal. However, if the noise persists after extended use, it may indicate a problem. 3. Excessive wear on brake discs or pads: Both brake discs and pads are high-wear components that undergo friction with each use. Over time, wear will naturally occur, leading to noise when excessively worn. Regular inspection and replacement are necessary. Typically, brake pads should be replaced every 60,000-80,000 kilometers, while brake discs should be replaced every 100,000-120,000 kilometers. 4. Installation issues: If brake pads are installed incorrectly or are of the wrong model, they may produce noise. Reinstalling the brake pads can help. Car owners should always have brake pads installed at professional auto repair shops, especially those who have had them replaced at roadside stalls.

[Santos]

I've been driving for over a decade and have encountered numerous instances of brake noise. The most common issue is with the brake pads – either they're worn down and need replacement, or the pad material is too hard, causing a sharp squealing sound during friction. Another frequent cause is uneven brake rotors, especially after car washes or during rainy days when water residue can lead to rust and pitting. Newly replaced brake pads require a break-in period of a few hundred kilometers, during which some noise is perfectly normal. However, if an older vehicle experiences steering wheel vibration along with the noise, it's essential to check the brake rotor thickness. Lastly, we must watch out for small stones getting lodged in the brake system – these can produce the most annoying grinding sounds. I recommend getting it checked at a repair shop when possible – safety always comes first.

[OTanner]

Last time my car made a sharp screeching noise when braking, the mechanic said it was the brake pad wear indicator making the sound. Most new car models now have this design—when the pads wear thin, the metal piece scrapes against the brake disc, serving as an early warning. Also, in northern winters, low temperatures can cause brake pads to frost and produce abnormal noises. If driving after rain, rust that hasn’t been worn off can also cause brief friction sounds. However, if a metallic grinding or squealing noise persists, there’s a high chance the caliper is stuck or the brake disc has been grooved. The braking system is critical for safety—don’t just turn up the music to drown out the problem. It’s much safer to take it to a reliable repair shop and have them lift the car for inspection.

[Chris]

Most brake noises are caused by physical friction issues. I've encountered three most common scenarios: rust on brake discs causing scraping sounds on rainy days; brake pads with hard materials and large particles, such as certain performance-oriented brake pads; or resonance caused by poor-quality brake pad backing plates vibrating. Improper installation can also lead to this, like forgetting to install anti-squeal shims or uneven application of brake grease. It's quite rare for brake discs to have oil stains, as daily driving usually wears them clean. New car owners shouldn't worry too much - the noise might disappear after a few hundred kilometers of driving. For older vehicles, check the brake pad thickness - if it's below 3mm, just replace them directly.