Why is there a clunking sound when releasing the brake?

[FrankLee]

Reasons for the clunking sound when releasing the brake: 1. If the sound occurs when the car is new, this is a normal situation. For new cars, the brake pads and brake discs need continuous run-in. The brake pads may not fully fit the brake discs during braking, but this usually improves after driving about 500 kilometers or after maintenance. 2. The brake disc and brake pad are stuck together due to rust, causing abnormal noise. This generally happens after driving in rainy weather and then leaving the car unused for several days. The brake disc and brake pad may rust and stick together, resulting in noise when driving again. This can be resolved by applying butter or special lubricating oil to the connection between the brake pad and the brake caliper at a repair shop.

[ValerieLynn]

When I encounter a clicking sound while releasing the brake, I always check the brake system first. The most common causes are worn brake pads or foreign objects stuck in them, such as a pebble lodged between the brake disc and pad, which can produce a sharp noise when releasing the handbrake. It could also be due to uneven or rusted brake discs, especially after humid conditions during the rainy season, as corrosion can create surface irregularities, affecting the smoothness of brake release. Another angle is loose suspension components, such as aged control arm bushings in the front suspension or damaged shock absorber cushions, leading to inconsistent movement. Additionally, insufficient lubrication of the brake caliper guide pins can cause a clicking sensation when the brake components retract. If a car goes too long without maintenance, these issues can accelerate wear and compromise driving safety. I once saw a friend's car suffer from ignored brake noise, which eventually led to brake pad chunks breaking off, doubling the repair costs. So, don't delay when you hear unusual sounds—get the brakes and suspension checked at a professional shop to save money and drive with peace of mind.

[CooperLee]

As an enthusiast who frequently tinkers with cars, I've found that a clunking sound when releasing the brake usually originates from the braking or suspension system. The mounting bolts of the brake caliper may have loosened, causing components to shift and collide when the handbrake is released. Alternatively, the edges of the brake disc might be warped or deformed, leading to inflexible return movement. In the suspension system, wear in the connecting parts of the lower control arm or stabilizer bar could generate friction noise when force is applied after releasing the brake. Another possibility is uneven brake pads during the break-in period of a new car, but this sound typically disappears after a few days of driving. However, for older vehicles, component aging, such as cracked rubber bushings, should be considered. Such abnormal noises are also related to driving habits; frequent hard braking or rapid acceleration on bumpy roads can accelerate wear. I recommend regularly checking tire and brake conditions and cleaning mud and debris from the wheel hubs to reduce failure rates. In summary, first try manually rocking the wheels to check for looseness. If the sound persists, have the car lifted for inspection to prevent minor issues from accumulating into safety hazards.

[RosalieLee]

When I hear a clunking sound while releasing the brake, I worry if something might be wrong. The most common reasons are wear gaps or debris between the brake pads and discs, causing collision sounds when released; or rust in the brake system leading to uneven friction when releasing the brake. Another possibility is aging suspension components like control arm bushings, which can make noise when the car moves. Sometimes, it's just new brakes that haven't been properly worn in, and the noise disappears after the break-in period. If it happens frequently, it might be an issue with the drive shaft or ball joints, though this is less likely. I suggest not taking it lightly—try lightly pressing the brake a few times to observe. If the sound disappears, it might be fine; otherwise, head to a repair shop immediately. Professionals can quickly identify the problem, saving you from driving with anxiety. Safety first—don't delay repairs.