What Causes the Abnormal Noise When Braking Hard?

[Julio]

The reasons for abnormal noise when braking hard are as follows: 1. Normal activation of ABS: The working process of ABS is actually a cyclic process of locking-releasing-locking-releasing, keeping the vehicle in a state of critical locking with intermittent rolling. When hard braking triggers the ABS, abnormal noise occurs, which is a normal phenomenon. In this case, simply press the brake pedal firmly to the end. 2. Rust on brake pads/discs: After parking for a long time, especially in humid weather or after rain, some rust or dirt may appear on the brake discs or pads. This can usually be resolved by driving for a while longer, or you can apply butter or special lubricating oil to the connection between the brake pads and calipers.

[StBella]

I've been driving for twenty years and have encountered the issue of strange noises when slamming on the brakes several times. Usually, it's because the brake pads are severely worn down, and when they reach the metal part, they make a squeaking sound, which is quite harsh on the ears. It could also be due to rust on the brake discs or small stones getting stuck, causing noise from friction during hard braking. Once, I had to brake hard on the highway, and the sound was terrifying. At the repair shop, they found the brake pads were almost completely worn out. The mechanic said if I didn't replace them soon, it could damage the brake discs, leading to costly repairs. I recommend regular checks on the braking system—I go every six months, and it's not expensive but gives peace of mind. Ignoring these noises can affect braking distance, and on rainy, slippery roads, it could easily lead to an accident. Remember, safety first—don't take minor issues lightly.

[ODeclan]

I enjoy doing some DIY work on my car. There are usually several possible reasons for squealing noises when slamming on the brakes. The most common issue is with the brake pads - if there's dust or debris on them, they may squeak during hard braking; new brake pads sometimes need a break-in period. Alternatively, warped brake rotors can cause uneven friction and noise, requiring machine resurfacing. During my last inspection, I found low brake fluid levels, which can also affect hydraulic system performance and cause noise. For DIY solutions, you can lightly sand the pads, but be careful not to overdo it as the ABS system is delicate and improper handling could damage it. It's best to have professionals handle it - their diagnostic tools are more accurate. Pay attention to sound changes during normal driving, as fixing small issues early is more cost-effective.

[Judy]

When I first bought my car last year, I heard a loud clunk when I slammed on the brakes, which worried me. The mechanic explained that common causes include worn brake pads or hard spots causing abnormal friction, or rust on the brake discs creating scraping sounds during sudden stops. In my case, it was just sand stuck in the brakes, and the noise disappeared after cleaning. However, ignoring such issues can lead to persistent noise, longer braking distances, and increased accident risks. I recommend getting your brakes checked promptly if you notice any unusual sounds—don’t delay. Now, I maintain my brakes regularly, which gives me more peace of mind while driving.

[McSabrina]

Having dealt with vehicle issues for many years, loud noises when braking hard are often caused by minor faults in the braking system. Worn or uneven brake pad materials can produce squeaking sounds; foreign objects like stones or metal shavings stuck on the rotor can create scraping noises when braking; or it could be due to rusted brake caliper pistons failing to retract properly. These factors can range from being merely annoying to posing serious safety risks. I once encountered a customer whose brakes became soft due to noise, nearly causing a rear-end collision. It's recommended to inspect brake pads and rotors every 40,000 kilometers or so and replace worn components promptly. Preventive measures include avoiding hard braking on dusty roads and maintaining gentle braking habits in daily use.