Why is the car making loud noises?

[Leon]

If your car is producing loud noises, you can identify the issue from the following aspects: 1. Squeaking sound from the car brakes: New brake pads and brake discs may not have fully worn in, resulting in a squealing noise. The noise will disappear after some time of use. For older cars, the brake pads may be worn out and need replacement. 2. Noise when accelerating by pressing the throttle: After checking the dashboard, inspect other areas inside the car. If everything seems normal, check if the transmission fluid is dirty, as this can cause the transmission pump to make noise. Also, check if the fuel used is causing engine knocking. Additionally, ensure the dashboard and console are not loose. 3. Very loud noise when starting the car: The optimal operating temperature for an engine is around 90 degrees Celsius. When starting a cold engine, the noise is louder partly because the engine hasn't reached its optimal temperature, leading to higher idle speed and engine RPM, which increases noise. Another reason is that engine oil tends to settle in the oil pan when the engine is cold, resulting in insufficient lubrication, which also contributes to the louder noise. 4. Loud noise when accelerating: If the issue lies with the car's engine, it might be due to a dirty throttle body or misfiring in the high-voltage circuit. It is recommended to inspect these two aspects.