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What Causes Abnormal Noises in the Car Chassis?

1 Answers
McRhett
07/30/25 6:15am
Abnormal noises in the car chassis can be caused by: 1. Corrosion or aging of the stabilizer bar bushing; 2. Damaged brake pads; 3. Malfunction in the connecting part between the suspension and shock absorber; 4. Abnormal noise from the wheel bearings; 5. Deformation of the shock absorber spring; 6. Aging or wear of the shock absorber pressure bearing. Daily maintenance methods for the car chassis include: 1. Proper adjustment of the front wheel toe-in; 2. Good lubrication and proper adjustment of the wheel hub bearings; 3. Monitoring changes in the front and rear axles and the frame; 4. Checking for any damage to the leaf springs; 5. Proper adjustment of the brake clearance; 6. Paying attention to the working condition of the clutch. The function of the car chassis is to support and install the car engine and its various component assemblies, forming the overall shape of the car, and to receive the power generated by the engine, ensuring normal driving when the car is in motion.
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More Forum Discussions

What is the normal tire pressure for sedans in summer and winter?

Normal tire pressure range in winter: In winter, the tire pressure should be based on the standard tire pressure of the car, with an appropriate increase of about 0.2bar. Normal tire pressure range in summer: Generally, the lower limit of the standard tire pressure of the car tire is sufficient. For example, the lower limit of standard tire pressure is 2.4bar. If the car is often parked outdoors, the tire pressure can generally be about 0.1bar lower than the standard to avoid tire blowouts due to high temperatures. According to the international GBT2978-2008 standard, the tire pressure for different tires is as follows: Standard tires: 2.4-2.5bar; Reinforced tires: 2.8-2.9bar; Maximum pressure: should not exceed 3.5bar. Tire pressure reset method: First, turn on the ignition switch, press and hold the tire pressure monitoring reset button, release it after hearing a "ding" sound, and the tire pressure monitoring system will store the current normal tire pressure data, automatically clear the original data, and finally the fault light on the dashboard will go out, and the tire pressure reset is completed.
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What are the functions of BMW voice control?

BMW voice control functions are as follows: 1. Voice recognition engine start: 1. Voice commands can be learned at any time, supporting all dialects, and command content can be freely defined; 2. Does not affect the original vehicle start function; 3. Can simultaneously use steering wheel button combinations as password start; 4. Language commands and steering wheel passwords can be modified at will. 2. Voice command control for original vehicle: 1. Voice commands can be learned at any time, supporting all dialects, and command content can be freely defined; 2. Use the voice control button on the original steering wheel to turn on and off; 3. Use the original factory protocol and original vehicle interface, plug-and-play, simple installation; 4. Original factory voice recognition technology, strong anti-interference ability, high recognition rate, and good stability.
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Does BMW have automatic transmission?

Most BMW models are equipped with automatic transmission. Additional information: Advantages of automatic transmission cars: 1. Automatic transmission cars are easier to operate than manual transmission cars: Automatic transmission cars can automatically match gears with speed, while manual transmission cars require manual gear shifting based on driving speed. Therefore, automatic transmission cars are easier to operate and more convenient to drive, especially for female drivers with less driving experience, making them an excellent choice. 2. Automatic transmission cars offer higher driving comfort: Automatic transmission cars do not require manual gear shifting or close coordination between hands and feet. When driving an automatic transmission car, there is no need to constantly shift gears; simply controlling the depth of the accelerator pedal can easily achieve speed changes, thus greatly enhancing driving comfort. 3. Automatic transmission cars have a higher safety factor: Automatic transmission cars have higher performance requirements in all aspects, with better quality in power and safety devices. Speed control is also relatively easier, so the safety factor of automatic transmission cars is relatively higher than that of manual transmission cars.
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What is the brand of BMW's original spark plugs?

BMW's original spark plugs are branded as NGK. Additional information: 1. Spark plug characteristics: The thermal characteristics of a spark plug are typically represented by its heat value. 2. Spark plug heat value: This indicates the balance between heat absorption and dissipation at the insulator skirt of the spark plug. A higher heat value means better balance between heat absorption and dissipation. Therefore, hot-type spark plugs have a low heat value, while cold-type spark plugs have a high heat value. Generally, high-power engines with large compression ratios use cold-type spark plugs with high heat values; conversely, low-power engines with small compression ratios use hot-type spark plugs with low heat values. The selection of spark plugs is usually determined by manufacturers through product qualification tests and should not be changed arbitrarily.
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What documents are needed for car insurance?

To get car insurance, you need to bring the vehicle license, vehicle transfer invoice, ID card and other documents. Here is additional information: 1. Vehicle insurance: Vehicle insurance, also known as motor vehicle insurance or auto insurance, refers to a commercial insurance that compensates for personal injury, death or property damage caused by natural disasters or accidents to motor vehicles. 2. Automobile insurance: Automobile insurance is a type of property insurance. In the field of property insurance, automobile insurance is a relatively young type of insurance, because it emerged and developed along with the appearance and popularization of automobiles. At the same time, different from modern motor vehicle insurance, in the early stage of automobile insurance, the third-party liability insurance of automobiles was the main insurance, and gradually expanded to the collision loss of the car body and other risks.
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Is it necessary to opt for BMW's lifetime free maintenance service?

Whether to choose BMW's lifetime free maintenance service depends on the user's usage pattern. If you don't have much time or lack trustworthy repair shops, you may consider opting for the lifetime free maintenance plan. The free items only include engine oil and oil filter, while labor costs and other replacement parts/fluids will incur additional charges. Additional information: BMW maintenance intervals: BMW vehicles require their first maintenance at 5,000 kilometers, primarily for oil change service, followed by maintenance every 10,000 kilometers. Subsequent maintenance follows a pattern of two minor services alternating with one major service. Minor maintenance typically only involves engine oil changes, while major maintenance includes replacing engine oil, oil filter, cabin air filter, air filter, etc., depending on the vehicle's usage condition.
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