Why Does a New Car Make Noise When Braking?

[BraxtonFitz]

Because the brake discs and pads of a new car are still in the break-in period, they may produce unusual noises when braking. Below is some relevant information about new car brake discs and pads: 1. Replacement cycle for brake discs and pads: Both brake discs and pads are high-wear items. Every time you brake, these two components rub against each other, leading to natural wear over time. When the wear becomes excessive, unusual noises will naturally occur, so regular inspection and replacement are necessary. Typically, brake pads should be replaced every 60,000 to 80,000 kilometers, while brake discs should be replaced every 100,000 to 120,000 kilometers. 2. Maintenance of brake discs and pads: Situations such as prolonged parking, humid climates, or rainy weather can cause some rust or dirt to form on the brake discs or pads. To maintain the brake discs and pads effectively, keep the car in regular driving condition, or apply butter or specialized lubricating oil to the connection points between the brake pads and brake calipers.

[VonLilah]

Having driven for so many years, it's quite normal to encounter squeaky brakes on a new car. The main reasons are that the brake pads on a brand-new car have a protective coating or minor surface irregularities from the factory, which can produce sharp noises when braking; additionally, the brake discs may have developed slight rust from moisture during storage, causing noise during initial friction. This situation usually resolves after a few days of break-in. You can try safely applying the brakes more frequently on clear roads to speed up the bedding-in process. If the noise persists beyond a week or is accompanied by vibration or unusual smells, it could indicate trapped debris or assembly issues—immediately visit a 4S shop for inspection. After all, brakes are critical for safety. Even though the car is under warranty, don’t take it lightly. Remember to regularly clean the undercarriage to prevent dust buildup that could lead to more serious issues.

[PaulMarie]

I was really annoyed when my new car's brakes kept squeaking. After checking, the possible causes could be insufficient smoothness in the initial friction between the brake pads and rotors, or small stones stuck near the tires and rims. Handling it yourself is simple: first, park and inspect around the tires for obvious debris, gently wiping them; then drive to a dry road and lightly apply the brakes to test. Normally, the noise lessens after a couple of days. If there's no improvement, seek professional repair. Such minor issues are common during a new car's break-in period—don't worry, but stay focused on safe driving and don't get distracted by the noise. Also, parking in sheltered spots to minimize rust is crucial.

[VonJoanna]

When I first got my new car, the brakes suddenly made a loud noise, and I thought it was broken, which scared me quite a bit. Later, a knowledgeable friend told me that all new cars are like this—the brake pads have a coating that needs to wear off during the break-in period. I kept driving, and after about a week, the noise faded. If it still makes noise, you should ask the 4S store staff or a nearby repair shop to check if it's normal. Don’t worry too much about new car issues; just keep it clean to avoid sand and dirt getting into the system.

[OAustin]

The brake system structure is quite intricate. On new cars, uneven surfaces of components and high-frequency vibrations during pedal pressure often cause noise. Materials like ceramic or semi-metallic brake pads, with uneven initial contact points, are prone to producing squeaks. This issue can be exacerbated by slight brake disc deformation or insufficient lubrication. Although optimized in design, assembly variations can temporarily lead to noise. The problem usually resolves itself after some driving as the contact surfaces smooth out, requiring no special treatment unless the vibration persists.

[RyleeLee]

My new car's brakes squealed for a while after delivery, probably due to initial break-in or insufficient lubrication. My solution was to practice emergency stops on safe roads to accelerate surface contact, and the noise reduced after a few days. If it squeals during rainy days or after prolonged parking, it's likely caused by temporary rust friction that disappears after drying. Remind technicians to clean brake components during regular maintenance to prevent long-term noise issues.