Why Does the Newly Replaced Brake Pads Make Noise at Low Speed?

[OJourney]

Brake pad noise can affect normal driving. The reasons and solutions for noise from newly replaced brake pads are as follows: 1. Noise occurs when braking, but not when not braking: This situation is caused by the wear between the brake pads and the brake disc. After prolonged use, the old brake pads and brake disc have formed a certain complementary shape. When new brake pads are installed, the edges of the brake pads may not make even contact with the brake disc, leading to friction and noise. 2. Issues with brake pad material: If non-standard brake pads are used, the larger particles in the material can easily cause noise during braking. 3. Solutions: For the first situation, the edges of the brake pads need to be smoothed to ensure no friction occurs between the brake pads and the brake disc, thus eliminating the noise. If this doesn't work well, a brake disc repair machine can be used to grind and polish the brake disc to solve the problem. For quality issues, it is necessary to replace them with good-quality brake pads.

[BrantleyFitz]

When I first installed new brake pads, they always squealed at low speeds, which I understand can be quite frustrating. In fact, new brake pads require a break-in period after installation, typically within the first 100 to 300 kilometers, as uneven friction surfaces can cause noise. If the installation isn't done properly—for example, if the caliper isn't tight enough or the brake disc is dirty with old marks—the vibration can be more noticeable. My advice is not to worry too much right away; try driving for a few days first. When parking, press the brakes a few extra times to help with the break-in. If the noise remains sharp and persistent, or if the brakes shake when applied, take your car to a repair shop immediately—it might need gap adjustment or a better set of pads. Remember to maintain them regularly to avoid moisture or dust buildup, which can lead to more noise. Safety comes first, so don't delay.

[JosiahAnn]

From experience, low-speed squeaking from newly replaced brake pads is mostly normal, primarily caused by the initial uneven friction between the new pad surface and the old brake disc. I've inspected many vehicles, and usually, the noise occurs because the caliper or brake pad wasn't properly aligned during installation, leading to excessive gap vibration and sound; or the pad material is too hard, causing squeaking at low speeds due to poor contact. Non-sharp noises typically disappear after driving for a week or two. If the noise is unbearably loud, you can check if the lubrication points lack grease or if the brake disc is worn and needs resurfacing. It's recommended to go directly to a workshop for inspection to avoid damaging parts by disassembling randomly. During daily driving, avoid sudden braking to accelerate the break-in process, which can save you some hassle.

[SanAdriana]

The new brake pads are annoyingly noisy at low speeds, and I've encountered this issue too. It's mostly due to the initial mismatch between the new pads and the rotor during the break-in period. The noise is less noticeable at high speeds but becomes obvious at low speeds. If the noise persists after a few days of driving, it might be caused by loose installation or uneven rotor surfaces leading to friction vibrations. Try gently applying the brakes while parked to help the surfaces make even contact. If the abnormal noise is accompanied by shaking, quickly have a mechanic check if the caliper is securely fastened. Don't endure it for too long, as bigger issues could affect the entire braking system's performance. Driving about a hundred kilometers should quiet them down.

[StephenLee]

It's quite common for newly replaced brake pads to produce abnormal noises at low speeds, and I've encountered similar situations multiple times. The reason is often due to inconsistent vibrations during the break-in period between the new pads and old rotors; improper installation, such as excessive clearance, can also cause low-frequency noise. Typically, the issue improves within 200 kilometers of driving. If the noise worsens, check for foreign objects stuck between the pads or poor-quality pads. I emphasize the importance of safety—persistent noise indicates compromised braking performance, especially during rainy conditions or emergency stops. It's advisable to visit a professional shop promptly for reinstallation or rotor resurfacing. Regular maintenance, including cleaning brake components, can help reduce such occurrences.

[OAmy]

The slight noise from newly replaced brake pads at low speeds, though minor, should not be overlooked. The sound often stems from uneven friction during the break-in period of new pads, making contact more sensitive at low speeds. Installation errors, such as loose caliper mounting causing excessive vibration, could be the primary cause. If the noise persists or worsens, the brake disc may need resurfacing, or the pads might contain hard spots requiring replacement. I recommend driving for a few days to observe; if no improvement is seen, have it inspected for lubrication and clearance issues. The risk lies in the potential delay in braking response due to the noise, compromising driving safety. During the break-in period, avoid aggressive driving and opt for smooth, slow driving to accelerate the adaptation process, ensuring safe operation.