What are the common abnormal noises in BMW 5 Series?

[DiDerek]

There are many reasons for abnormal noises in BMW 5 Series, such as tire friction, chassis impact, engine abnormalities, etc. The following are specific causes of abnormal noises in BMW 5 Series: Engine compartment noise: There are many reasons for abnormal noises in the engine compartment. Professional diagnosis is required. If it's a belt slipping, the noise will be sharp and harsh. If it's a sound of air leakage, it may be due to a blockage in the exhaust system or vacuum tube. If there is a dry metal friction sound outside the engine during operation, it is usually a sign of damage to the generator, water pump, or power steering pump bearings. Transmission noise: If you hear continuous abnormal noises while driving, and the sound disappears when the clutch is pressed, it indicates that the noise source may be caused by worn bearings or gears in the transmission. Take the car to a repair shop to check the transmission and add some lubricating oil, and the noise should disappear. Tire noise: Tire noise is generally rhythmic, and the frequency increases with speed. If it's a dull sound, it is mostly due to tire tread deformation, bulging, severe wear, or insufficient air pressure.