What Causes Noise from the BMW 5 Series Chassis When Starting?
2 Answers
Possible reasons for noise from the car chassis include interference between components, loose bolts or nuts, failure of the driveshaft universal joint, and abnormal noise from the wheel hub bearings. The key to inspecting the car chassis lies in "diligence." A smart car owner must be a diligent one, as the role of the chassis cannot be overlooked. Regularly checking its working condition is also a necessary guarantee for driving safety. Relevant information about the car chassis is as follows: 1. Introduction: The car chassis consists of four parts: the transmission system, the running system, the steering system, and the braking system. The function of the chassis is to support and install the car engine and its various components and assemblies, forming the overall shape of the car, receiving the power from the engine to make the car move and ensuring normal driving. 2. Maintenance details: To maintain the chassis in winter, thorough cleaning and rust-proof treatment of the chassis are required. First, the chassis must be thoroughly cleaned. If there is excessive mud or dirt on the chassis, a degreasing cleaner should be used to wash it once, revealing the original "color" of the chassis, so that rust-proof care can begin.
When starting the BMW 5 Series, there is a noise from the chassis. I have encountered similar issues several times, usually due to aging suspension components. For example, when shock absorbers or springs are worn or cracked under heavy starting loads, they can produce a creaking sound. Poorly fixed brake calipers can also cause a clicking noise, especially when releasing the brake to start. It is recommended to start with simple checks: shake the chassis after parking to feel for any looseness; listen to the direction of the sound—if it's from the rear, it might be a driveshaft issue, common in BMW rear-wheel-drive cars. Don't delay; get a professional diagnosis to avoid minor problems worsening and leading to loss of control. My personal experience tells me that early intervention saves both hassle and money. Worn universal joints in the driveshaft are another common issue, especially noticeable when starting during turns.
