Is it normal for the BMW X1 to make loud noises when starting up?

[FranciscoDella]

It is not normal for the BMW X1 to make loud noises when starting up. Below is an analysis of the reasons and solutions: 1. Reason Analysis: During a cold start, the engine temperature is relatively low, and the engine oil inside has all flowed back into the oil pan due to prolonged parking. Additionally, to help the engine reach its normal operating temperature quickly, the starting RPM is higher, which is why the engine noise seems louder during a cold start. Once the engine warms up, the noise should return to normal. 2. Solution: During engine startup, the starter motor should not produce any screeching sounds; otherwise, it may indicate a starter motor fault or overly tight belts. The engine idle should have a uniform "puttering" sound without any abnormal noises, and the idle speed should stabilize around 850 RPM. Gently press the accelerator to gradually increase the engine RPM, ensuring there are no abnormal sounds during this process. Some models may experience resonance at specific RPMs, causing the entire body to shake, but this resonance should disappear once past that RPM. After the engine RPM exceeds the maximum power point, the sound generally becomes more noticeable, but there should be no metal scraping noises.