
Reasons for the squeaking noise in the Buick Excelle's brakes: presence of foreign objects on the brake disc surface, lack of lubrication in the vehicle, or oil contamination between the brake pads and brake disc. Here is a detailed explanation of these reasons: Presence of foreign objects on the brake disc surface: You can check if there are any foreign objects on the brake disc surface that may cause abnormal wear. If it is found that the noise when braking is due to foreign objects on the brake disc surface, these objects should be removed. Lack of lubrication in the vehicle: If there is a squeaking noise near the door when braking, it is a sign that the vehicle lacks lubrication. Oil contamination between the brake pads and brake disc: Check if the wear between the brake pads and brake disc is caused by oil contamination. Cleaning the oil between the brake pads and brake disc and ensuring there are no foreign objects between them can solve the problem.

I've encountered brake noise issues a few times over the years driving my Excelle. The most common cause is severely worn brake pads - when you press the pedal, the metal-on-metal contact creates an awful screeching sound. Another frequent culprit is scratched or pitted brake discs, often caused by road debris like flying pebbles, especially after prolonged driving on rural roads. If the noise is particularly noticeable during cold starts, it's likely just surface rust or moisture on the brake pads that disappears after a few braking cycles. However, it could also indicate loose calipers or overdue brake fluid changes. In such cases, it's best to have a professional inspect the entire brake system to prevent minor issues from becoming major safety hazards. Remember to regularly check pad thickness - replace them immediately when worn below 3mm, as safety should always come before cost savings.

The squeaking noise from the brake of the Buick Excelle is, in my opinion, largely caused by driving habits. Sudden hard braking at high speeds or frequent stop-and-go driving in congested traffic can overheat and harden the brake pads, causing them to squeak like sawing wood. Additionally, after rain or car washing, the wet chassis can produce rustling sounds, which become less noticeable once it dries out after driving for a while. However, if the noise occurs every time you brake, it's best to get it checked. It might just be a small foreign object stuck in the brake disc. Those who are handy can remove the wheel themselves to inspect and clean it, while those less familiar with car maintenance should seek professional help—it usually costs around a hundred bucks, which is better than risking an accident. Regular smooth acceleration and deceleration, along with applying lubricant during maintenance, can prevent many of these noises.

Brake noise is usually caused by insufficient friction due to aging brake pads or improper installation. After prolonged use of new cars, when the pads become thin or contaminated with oil, stepping on them can produce particularly harsh noises. It could also be sounds from misaligned discs or excessive hardness at low temperatures. It's recommended to check and clean them during regular maintenance and choose high-quality branded parts when replacing pads to avoid rework. If you hear any noise yourself, address the potential issue promptly without delay.


