Why does the brake make noise when reversing?

[JadeLee]

The reasons why the brake makes noise when reversing: 1. Normal noise phenomenon; 2. Brake pad wear; 3. There is a certain gap between the brake pad and the rear end of the bracket. The working principle of the brake mainly comes from friction. By using the friction between the brake pads and the brake disc, as well as the friction between the tires and the ground, the kinetic energy of the vehicle is converted into heat energy after friction, thereby stopping the vehicle. Brake inspection steps: 1. Check the brake pads. The effectiveness of the brake largely depends on the condition of the brake pads, so checking whether the wear degree of the brake pads is normal is of great significance to ensure brake performance; 2. Check the brake fluid. Pay attention to the weather characteristics of the location and destination to prevent excessive moisture from entering the brake fluid, which may have adverse effects on the brake.

[OLuna]

I've been driving for twenty years, and sometimes when I brake while reversing, it makes a very loud noise, mainly because the brake pads are worn too thin, and the metal parts start to rub. Especially when reversing at low speeds, accumulated dust or rust on the brake discs can suddenly be pressed down, causing a squeaking sound. I remember after changing my car two years ago, several times when reversing in the garage, the brakes would screech loudly as soon as I stepped on them. Upon inspection, I found that the brake pads were nearing the end of their lifespan. Driving habits also play a big role—for example, braking unevenly while reversing can easily cause uneven stress on the components. I recommend developing a habit of braking gently. If the noise gets loud, go to a repair shop and get it checked—don’t delay until it turns into a more serious brake failure. Regular maintenance can prevent these issues and also save fuel and money—a win-win.

[VanHope]

As a young car owner, I often drive automatic transmission vehicles, and there are several reasons why the brakes might squeak when reversing. Sometimes, it's due to the brake system sensors mistakenly triggering an alarm sound, especially when the parking assist system is active. Another possibility is that reversing is slower than moving forward, causing slight rust on the brake discs to vibrate and produce noise—for example, after rain, when rust is more noticeable, you might hear a squeak when braking. With the rise of electric vehicles, the added weight from batteries can alter brake pressure, leading to similar issues. It's a good idea to occasionally clean around the wheels to reduce dust buildup. If the noise persists, seek professional inspection—don't overlook this detail, as it can affect both safety and peace of mind.

[LucyLee]

I usually pick up and drop off my kids at school, often reversing into parking spaces, and frequently hear a clicking sound when braking. It's mostly due to rust on the brake disc surface or small foreign objects like pebbles getting stuck. When reversing, the wheels turn at a larger angle, making it easier for the brake components to rub and produce noise. For example, after washing the car or in humid weather, rust forms quickly, and the noise becomes obvious when braking. Operating gently can reduce the noise—avoid sudden braking. Simple maintenance can solve the issue, and regular checks on brake pad wear are crucial.

[LaZoey]

I think the noise when braking in reverse is mostly due to mechanical reasons. When the brake pads wear to the limit, the metal backing plate directly scrapes against the brake disc. When reversing, the car moves backward, and gravity presses on the rear wheels, intensifying the friction and causing a rattling sound. Uneven brake discs or dust blockage are also common factors, especially in older vehicles, which are prone to such issues. It's important to replace the worn parts promptly to avoid damaging other systems. Before taking any action, it's recommended to try cleaning the dust around the wheels with a soft cloth yourself.