What maintenance does a BMW need at 20,000 kilometers?

Is the highway free during the Mid-Autumn Festival every year?

Highways are charged as usual during the Mid-Autumn Festival, with no toll-free policy. During the four major holidays each year—Spring Festival, Qingming Festival, Labor Day, and National Day—small passenger vehicles with seven seats or fewer (including seven seats) enjoy a total of 20 toll-free days on highways. The toll-free periods are as follows: 1. Spring Festival: From 00:00 on February 7 (New Year's Eve) to 24:00 on February 13 (the sixth day of the Lunar New Year). 2. Qingming Festival: From 00:00 on April 2 to 24:00 on April 4. 3. Labor Day: From 00:00 on April 30 to 24:00 on May 2. 4. National Day: From 00:00 on October 1 to 24:00 on October 7.

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What Components Make Up an Electronic Control System?

Electronic control systems primarily consist of sensors, control units, and actuators. These systems can be divided into the following four categories: 1) Engine and powertrain centralized control systems: including engine centralized control systems, automated transmission control systems, anti-lock braking and traction control systems, etc.; 2) Chassis integrated control and safety systems: including vehicle stability control systems, active body attitude control systems, cruise control systems, collision warning systems, intelligent driver support systems, etc.; 3) Intelligent body electronic systems: automatic seat adjustment systems, intelligent headlight systems, automotive night vision systems, electronic door locks and anti-theft systems, etc.; 4) Communication and information/entertainment systems: including intelligent car navigation systems, voice recognition systems, "ON-STAR" systems (featuring automatic emergency calls and inquiries), automotive maintenance data transmission systems, car audio systems, real-time traffic information consultation systems, dynamic vehicle tracking and management systems, and information service systems (including networks, etc.).

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What are the symptoms of a faulty oil cooler?

Symptoms of a faulty oil cooler include signs of oil leakage at the oil cooler location, the fan not rotating, and the presence of oil in the radiator. Below is a partial introduction regarding oil cooler damage: 1. Causes of damage: The oil cooler, also known as the oil cooler, is prone to failures such as copper pipe ruptures and cracks in the front and rear covers, often caused by not draining the cooling water inside the diesel engine body during winter. 2. Inspection methods: When damage occurs, a significant amount of oil will appear in the cooling water, and the oil level in the cooling water will increase rapidly. A damaged oil cooler needs to be replaced, and a damaged seal ring also requires replacement.

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Can I still get a driver's license at the age of 60?

Individuals aged 60 to 70 can apply. Those aged 60 to 70 can obtain a driver's license for small cars (C1), small automatic transmission cars (C2), small automatic transmission passenger cars for the disabled (C5), and light motorcycles (F). According to Article 12 of the "Regulations on the Application and Use of Motor Vehicle Driving Licenses," applicants for a motor vehicle driving license must meet the following requirements: (1) Age requirements: 1. For small cars, small automatic transmission cars, small automatic transmission passenger cars for the disabled, and light motorcycles, the applicant must be between 18 and 70 years old. 2. For low-speed trucks, three-wheeled cars, ordinary three-wheeled motorcycles, ordinary two-wheeled motorcycles, or wheeled self-propelled machinery, the applicant must be between 18 and 60 years old. 3. For city buses, large trucks, trolleybuses, or trams, the applicant must be between 20 and 50 years old. 4. For medium-sized passenger vehicles, the applicant must be between 21 and 50 years old. 5. For tractor-trailers, the applicant must be between 24 and 50 years old. 6. For large passenger vehicles, the applicant must be between 26 and 50 years old. 7. Students receiving full-time driving vocational education can apply for large passenger vehicles or tractor-trailers if they are between 20 and 50 years old. (2) Physical requirements: 1. Height: Applicants for large passenger vehicles, tractor-trailers, city buses, large trucks, or trolleybuses must be at least 155 cm tall. For medium-sized passenger vehicles, the minimum height is 150 cm. 2. Vision: Applicants for large passenger vehicles, tractor-trailers, city buses, medium-sized passenger vehicles, large trucks, trolleybuses, or trams must have uncorrected or corrected visual acuity of at least 5.0 on the logarithmic visual acuity chart. For other vehicle types, the requirement is at least 4.9. Individuals with monocular vision impairment can apply for small cars, small automatic transmission cars, low-speed trucks, three-wheeled cars, or small automatic transmission passenger cars for the disabled if their uncorrected or corrected visual acuity in the right eye is at least 5.0 and their horizontal field of vision is at least 150 degrees. 3. Color vision: No red-green color blindness.

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What is the purpose of a vehicle identification number?

The vehicle identification number (VIN) serves as the car's unique identifier, similar to an ID card. It is determined according to national vehicle management standards and contains information about the manufacturer, production year, model, body type, engine code, and assembly location. Below is a partial introduction to the VIN: 1. Overview: The Vehicle Identification Number (VIN) is an abbreviation for 'Vehicle Identification Number.' According to ASE standards, the VIN consists of 17 characters, hence it is commonly referred to as the 17-digit code. Correctly interpreting the VIN is crucial for accurately identifying the vehicle model and ensuring proper diagnosis and maintenance. 2. Explanation: The vehicle identification number should consist of three parts: Part 1, the World Manufacturer Identifier (WMI); Part 2, the Vehicle Descriptor Section (VDS); and Part 3, the Vehicle Identifier Section (VIS).

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What is the working principle of ABS?

ABS system, also known as the Anti-lock Braking System, works as follows: During braking, the ABS closes the normally open input solenoid valve on the wheel that begins to lock based on the speed signals from each wheel speed sensor, keeping the braking force constant. If the wheel continues to lock, the normally closed output solenoid valve is opened. This keeps the braking state at the optimal point, ensuring the best braking performance and maximum driving safety. ABS, short for Anti-lock Braking System, automatically controls the braking force during vehicle braking to prevent wheel lock-up, maintaining a state where the wheels are both rolling and slipping (with a slip ratio of about 20%). This ensures maximum traction between the wheels and the road surface. The ABS system mainly consists of four components: wheel speed sensors, the electronic control unit (ECU), the hydraulic unit, and the ABS warning light. The wheel speed sensors detect the motion state of the wheels and generate sinusoidal electronic pulse signals. These signals are processed by a modulator, converted into digital signals, and transmitted to the electronic control unit. The electronic central control unit (ECU) receives input signals from the wheel speed sensors and calculates parameters such as wheel speed, vehicle speed, and slip ratio. Based on the slip ratio, it determines the wheel state and issues control commands to the hydraulic unit. The hydraulic unit adjusts the pressure in the brake lines according to the control commands, with the adjustment process including pressure holding, pressure increase, and pressure decrease. The ABS warning light alerts the driver to any system malfunctions. If the ABS warning light comes on, it is recommended not to continue driving. An illuminated ABS light indicates a fault in the vehicle's anti-lock braking system. During emergency braking, if the wheels lock up, the vehicle may skid uncontrollably, making it difficult for the driver to slow down or adjust the vehicle's trajectory, posing significant safety risks.

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What maintenance does a BMW need at 20,000 kilometers?

Is the highway free during the Mid-Autumn Festival every year?

What Components Make Up an Electronic Control System?

What are the symptoms of a faulty oil cooler?

Can I still get a driver's license at the age of 60?

What is the purpose of a vehicle identification number?

What is the working principle of ABS?

Can You Get a Driver's License While Pregnant?

What Causes the Car Engine Warning Light to Illuminate?

What Causes the Brake Warning Light to Illuminate?

What Does Regular Car Maintenance Include?