What are the differences between the Yuhu 7 and Yuhu 9?

Is It Safe to Leave a New Car at the 4S Store for a Few Days?

Leaving a new car at a regular 4S store is relatively safe. Compared to auto repair shops and external parking lots, 4S stores have more comprehensive facilities. 4S stores have clear regulations that any staff member cannot drive the car away without the owner's authorization, and violations will result in corresponding penalties. Here are some precautions for purchasing a new car: 1. Purchase Invoice: The purchase invoice is the most important proof when buying a car and is also one of the necessary documents for vehicle registration. Therefore, be sure to ask the dealer for the purchase invoice and confirm its validity. 2. Vehicle Certificate: The certificate is another crucial document and is required for vehicle registration. Only cars with this certificate meet the national standards for motor vehicle quality and related requirements. 3. Warranty Card: According to regulations, if a car experiences faults or damages due to manufacturing defects within a certain period or mileage, the warranty card entitles the owner to free services from the manufacturer. However, consumable parts like bulbs and rubber are not included. 4. Check the Vehicle Plate: The vehicle plate is located on the driver's side door or in the engine compartment. Pay attention to whether the VIN matches and if the manufacturing date is too far in the past. Generally, if the time exceeds six months, the car might be a stock or demo vehicle. 5. Check the Production Dates of Glass and Tires: The production dates of the windows and tires should not be too far from the car's manufacturing date. If there are discrepancies, the windows or tires might have been replaced. If you're concerned about the car being tampered with during storage, you can use corresponding methods to verify.

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What are the reasons for excessive vehicle exhaust emissions?

The reasons for excessive vehicle exhaust emissions are: 1. Engine misfiring; 2. Spark plug oil leakage; 3. Failure of the three-way catalytic converter; 4. Dirty intake system, exhaust system, or fuel system; 5. Faulty oxygen sensor; 6. Aging components, poor contact, or poor sealing; 7. Incomplete fuel combustion. The solutions for excessive vehicle exhaust emissions are: 1. Replace the engine; 2. Replace the spark plugs; 3. Replace the three-way catalytic converter; 4. Check the oxygen sensor; 5. Clean the intake system, exhaust system, and fuel system; 6. Add additives to the engine oil. Vehicle exhaust is an environmental pollution caused by the waste gases emitted by vehicles, and its pollutants include: carbon monoxide, hydrocarbons, nitrogen oxides, sulfur dioxide, lead compounds, and particulate matter.

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What to Pay Attention to When Buying a New Car?

Key considerations when purchasing a new car include: 1. Inspect the vehicle's exterior for any scratches; 2. Check if all functional equipment operates normally, primarily listening for any abnormal engine noises and verifying the accuracy of instrument displays; 3. Verify the completeness of vehicle documentation such as the certificate of conformity, user manual, maintenance manual, and onboard tool list; 4. After receiving the certificate of conformity, cross-check whether the purchased vehicle model matches the actual car. Materials required for vehicle registration include: 1. Triple invoice from the car purchase; 2. Payment of vehicle purchase tax; 3. Application form for motor vehicle registration, transfer, deregistration, or transfer-in; 4. Compulsory insurance policy; 5. Vehicle certificate of conformity; 6. Original and photocopy of ID card, with non-local residents needing to provide original and photocopy of residence permit.

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How many kilometers are required for the first maintenance?

The first maintenance should be performed between 3,000 to 5,000 kilometers. The first maintenance includes: 1. Changing the engine oil, oil filter, and cleaning the air filter, checking whether the generator belt and wiper blades are damaged; 2. Checking whether the levels of various fluids are normal; 3. Checking whether the tire pressure is normal and whether there is uneven tire wear, bulging, or damage; 4. Inspecting the car chassis, including the brake pads, brake discs, connecting rods, ball joints, and CV joints for any scratches; 5. Checking whether all switches and lights in the car are working properly. Precautions for the first maintenance are: 1. Make an appointment in advance; 2. Record any faults or questions encountered while driving and inform the staff during the maintenance registration.

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Why does the car air conditioning only cool down when the car is running?

The reasons why the car air conditioning only cools down when the car is running are: 1. Insufficient refrigerant; 2. Expansion valve blockage or evaporator coil blockage; 3. Condenser coil blockage or excessively high system temperature, resulting in poor cooling performance; 4. Leakage in the air conditioning system pipeline; 5. Insufficient pressure from the air conditioning compressor; 6. Blown air conditioning fuse, damaged wiring, short circuit, or poor connector. The functions of car air conditioning are: 1. Achieving cooling effects through the continuous phase change cycle of the refrigerant; 2. Removing dust, odors, smoke, and toxic gases from the air inside the car to freshen the cabin air, and humidifying the cabin air to increase its relative humidity.

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How to Remove the Reading Light Cover?

Reading light cover removal method: 1. Pry open along the periphery with a flat-head screwdriver, avoid prying the central cover part; 2. Remove the internal cross screws or clips to complete disassembly. The reading light provides sufficient brightness for passengers when interior lighting is inadequate, facilitating in-car reading without affecting the driver's normal operation. Current automotive reading lights include conventional and LED types. Activation methods: 1. When the switch is in the 'door' position, the light illuminates upon door opening; 2. With ignition switched to 'on', the reading light activates when its rear switch is set to 'on' position.

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What are the differences between the Yuhu 7 and Yuhu 9?

Is It Safe to Leave a New Car at the 4S Store for a Few Days?

What are the reasons for excessive vehicle exhaust emissions?

What to Pay Attention to When Buying a New Car?

How many kilometers are required for the first maintenance?

Why does the car air conditioning only cool down when the car is running?

How to Remove the Reading Light Cover?

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