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What Causes the Abnormal Noises in BMW Cars?

2 Answers

DelAaliyah

08/28/25 6:12am

The causes of abnormal noises in BMW cars are as follows: 1. Body noise: This issue is usually due to insufficient body rigidity, causing deformation during driving, friction or shaking between doors and door frames, or friction between steel plates due to welding failures in certain areas. Applying adhesive strips on doors and windows or placing rubber pads in friction-prone areas can reduce or eliminate the noise. 2. Engine compartment noise: There are various possibilities for noises here. A high-pitched belt squeal is typically caused by belt slippage. If there is a dry metal friction sound outside the engine while it is running, it usually indicates damage to the generator, water pump, or power steering pump bearings. A hissing sound during engine operation may suggest a blocked exhaust system, vacuum tube leakage, or breakage. 3. Transmission noise: If there is a "rustling" sound inside the transmission while driving, which disappears when the clutch is pressed, it indicates a transmission malfunction as the source of the noise.

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LeSimon

09/10/25 4:32am

I often encounter strange noises in my car, and with BMWs, the most common causes are aging suspension systems or loose components. Listening to the source of the sound can help locate the issue—if the noise is louder on bumpy roads, such as in pothole areas, it might be due to worn suspension springs, links, or bushings. Over time, cracked rubber can make the noise more noticeable. The braking system is another frequent culprit; worn brake pads or foreign objects stuck in them can produce squeaking sounds, especially when starting to move. Under the hood, a loose belt or vibrating components can also cause noise. I recommend car owners start with simple checks, ensuring tire pressure is even and no stones are stuck, and that the brakes are functioning properly. Don’t overlook minor issues—regular maintenance of suspension components can extend their lifespan. However, if the noise persists, it’s safer to visit a professional shop for a diagnostic tool check. After all, driving safety comes first, and addressing issues early can prevent bigger problems.

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What are the differences between the 2017 and 2018 BMW 3 Series models?

The differences between the 2017 and 2018 models lie in their configurations. The powertrain and safety features remain the same. Both offer a 2.0T high-power engine with a maximum output of 185kW (252PS) and a peak torque of 350Nm. Both are paired with an 8-speed automatic transmission. In terms of safety, both models come with brake assist (BA/EBA/BAS, etc.), front and passenger airbags, hill start assist, and more. Assistance and control features: The 2017 model could be optionally equipped with a panoramic camera, adaptive cruise control, automatic parking, and variable steering ratio, while the 2018 model did not offer these options. Exterior features: Both the 2017 and 2018 models come standard with automatic headlights, but the 2017 model could be optionally equipped with automatic steering. The auto-dimming rearview mirror was standard on the 2017 model but optional on the 2018 model. Privacy glass was standard on the 2017 model but not available on the 2018 model. The power trunk was electrically operated on the 2017 model, while the 2018 model offered an optional automatic sensing feature, making the trunk functionality superior in the 2018 model. Multimedia features: The 2017 model could be optionally equipped with a HUD (Head-Up Display), which was not available on the 2018 model. The 2017 model also offered optional GPS navigation, a car networking system, and Harman Kardon speakers, while the 2018 model did not. Both the 2017 and 2018 models came standard with a 6.5-inch color touchscreen, but the 2017 model could be upgraded to an 8.8-inch screen.

How to Open the Hood of a Haval H6?

Haval H6 hood opening method: 1. After entering the car's interior, locate the main driver's compartment, which is on the left side of the driver's seat. 2. You will find a button, which is the hood release switch. 3. Press the switch to open the hood. Additional information: 1. Powertrain. It is equipped with a 1.5t-EVO engine, with an expanded maximum torque output range of 1400-3600 rpm, paired with a second-generation 7DCT transmission, achieving a comprehensive transmission efficiency of up to 95.6%. 2. Safety. The concept of "safety without hierarchy" is proposed, featuring a standard 71.61% high-strength steel body, hot-formed steel integrated door frames, and 6 airbags, with the hot-formed steel strength reaching up to 2000Mpa.

What is the fuel consumption of the Volkswagen Tharu?

The Volkswagen Tharu has 16 models currently on sale. Among them, the 2022 330TSI 4WD Luxury Edition, 4WD Flagship Edition, and the 2021 330TSI 4WD Flagship Edition, 4WD Luxury Edition, and 4WD Luxury Edition PLUS—totaling 5 models—are equipped with a 150-horsepower engine, with an NEDC fuel consumption of 6.49L per 100km. The remaining 11 models on sale are equipped with a 186-horsepower engine, with an NEDC fuel consumption of 7.16L per 100km. The fuel tank capacity varies among different models of the Volkswagen Tharu. The distance that can be covered on a full tank of fuel is as follows: For models equipped with a 150-horsepower engine and an NEDC fuel consumption of 6.49L per 100km, the fuel tank capacity is 51L, allowing a distance of 51/6.49*100=786km on a full tank. For models equipped with a 186-horsepower engine and an NEDC fuel consumption of 7.16L per 100km, the fuel tank capacity is 56.5L, allowing a distance of 56.5/7.16*100=789km on a full tank. Vehicle fuel consumption is directly influenced by five major factors: driving habits, the vehicle itself, road conditions, wind resistance, and ambient temperature. Specific factors that can increase fuel consumption include: Driving habits: Aggressive driving behaviors such as sudden acceleration, frequent overtaking, and not easing off the throttle before stopping at a red light can increase fuel consumption. The vehicle itself: Vehicles with larger engine displacements generally consume more fuel than those with smaller displacements, as larger displacements typically produce more power and require more gasoline for combustion. Heavier vehicles also consume more fuel due to the greater driving torque needed. Road conditions: Driving on unpaved roads, muddy roads, soft surfaces, or mountainous terrain increases resistance and fuel consumption. Wind resistance: Driving against strong winds or on windy days increases vehicle resistance and fuel consumption. Low ambient temperatures: When the engine block is cold, gasoline injected during a cold start does not atomize easily, requiring more fuel for combustion, which increases consumption. Additionally, in cold weather, the engine control unit may operate at higher RPMs to warm up the engine, further increasing fuel consumption.

What are the dimensions of a 17.5-meter flatbed truck?

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How to Remove the Rear Seat of a Corolla?

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