What causes the rattling noise in BMW X1?
1 Answers
BMW X1 rattling noise may be caused by the following reasons: 1. Loose fasteners: Vibration during engine operation causes certain components to loosen, resulting in noise. 2. Deformation or damage of individual parts: Noise caused by deformation or damage of certain components. 3. Improper assembly adjustment or repair: Incorrect assembly adjustment or repair leads to misalignment of component clearances. 4. Excessive clearance: Clearance is an important indicator of automotive assembly quality. When lubrication, temperature, load, and speed are constant, noise becomes more pronounced as clearance increases. Natural wear of certain engine moving parts causes clearance to exceed limits, resulting in noise, such as piston-to-cylinder wall knocking sounds, connecting rod bearing-to-journal impact sounds, etc.