Why does the car alarm go off by itself?

[BrooklynLee]

If the car alarm keeps going off, it is most likely because the sensitivity of the anti-theft device is set too high, causing the alarm to trigger even with slight vibrations. To resolve this issue, first locate the main unit of the anti-theft device, which is usually found under the steering wheel or inside the panel below the A-pillar. Then, simply adjust the sensitivity slightly. As for the reasons why the brakes make noise without pressing the brake pedal, they are as follows: 1. Use of low-quality or overly hard brake pads: If inferior or excessively hard brake pads are used, they may produce a squeaking noise when they rub against the brake discs during braking. Therefore, always opt for high-quality brake pads when replacing them. 2. Presence of sand or foreign objects between the brake pads and discs: While driving, it's common to encounter complex road conditions. Due to the unique design of disc brakes, some sand or foreign objects may get trapped between the brake pads and discs, leading to unusual noises during braking.