What does NVH performance mean?

Should a Punctured Tire Be Repaired or Replaced?

Tire punctures should be addressed based on the specific situation: if the puncture is on the tread, it can be repaired; if the puncture is on the sidewall, the tire should be replaced. Functions of tires: 1. Transmit driving force, braking force, and steering force to enable vehicle operation; 2. Support vehicle load; 3. Reduce and absorb vibrations and impacts during driving. Precautions for tire replacement: 1. Identify the front and back sides of the tire; 2. Choose tires of qualified quality; 3. Replace the valve stem simultaneously; 4. Determine the installation direction; 5. Install new tires on the rear axle of the vehicle; 6. Avoid sudden braking after replacing a new tire; 7. Remove screws diagonally when removing the tire; 8. Perform a four-wheel alignment when replacing tires.

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What Causes Engine Breather Pipe to Spray Engine Oil?

There are several main reasons why an engine breather pipe sprays engine oil: 1. Issues with the crankcase ventilation system: The simplest troubleshooting method is to directly pull out the oil dipstick and check if engine oil is spraying out from the dipstick tube. If so, it indicates a damaged PCV valve. 2. If the vehicle's breather pipe is connected to the upper part, then valve stem seal issues should be considered: Generally speaking, engine oil discharge from the breather pipe is due to excessive crankcase pressure. If the engine was recently serviced and there was residual oil in the cylinders, some oil discharge may occur temporarily. However, if oil leakage persists after prolonged operation post-repair, it may be caused by wear in the turbocharger's floating bearing seals leading to oil leakage.

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Will starting the car in D gear cause damage?

Starting the car in D gear can cause damage. D gear is the forward gear, and many modern automatic transmission vehicles are equipped with automatic detection systems that usually prevent the engine from starting in D gear. Forcibly starting the engine in D gear may harm the vehicle. The engine's power is transmitted through the transmission, which is also a key factor affecting fuel consumption. Generally, automatic transmissions consume over 10% more fuel than manual transmissions. Whether manual or automatic, more gears usually mean better fuel efficiency. More details are as follows: 1. Automatic transmissions use planetary gear mechanisms to shift gears automatically based on throttle pedal position and vehicle speed changes. The driver only needs to control the speed with the accelerator pedal. 2. Generally, the commonly used automatic transmissions in vehicles include the following types: hydraulic automatic transmissions, hydrostatic automatic transmissions, electric automatic transmissions, stepped mechanical automatic transmissions, and continuously variable mechanical automatic transmissions.

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How to Identify Inventory Vehicles?

Methods to identify inventory vehicles are: 1. Check the production nameplate: There is a vehicle nameplate below the B-pillar on the right side of the vehicle, which indicates the vehicle production date, engine parameters, and other information; 2. Check the glass: The car glass will have the production date and year marked on it; 3. Check the tires: Determine the production time through the tire's production date; 4. Inspect the engine compartment: Open the engine and check if the engine is clean. Precautions when buying a car: 1. Choose the brand and model; 2. Select a price range; 3. Communicate rationally with the salesperson; 4. Choose the configuration; 5. Pay attention to the contract; 6. Check if the car's relevant documents are complete; 7. Inspect the body's exterior paint and interior for any damage; 8. Verify if the production date on the vehicle nameplate matches the car's relevant documents; 9. Check if the engine is working properly and if the vehicle's basic functions are normal.

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Is the Electronic Parking Brake Prone to Malfunction?

Generally speaking, the electronic parking brake is not prone to malfunction. However, if the car experiences severe power loss, the electronic parking brake may fail to function due to insufficient power. The electronic parking brake is a technology that uses an electronic system to control the vehicle's parking brake, achieving the same effect as a mechanical handbrake but with a different control method. Its advantages include saving the space occupied by a mechanical handbrake, creating more central console space; simple operation and effort-saving; and adding multiple functions such as auto start-stop and hill-start assist. More details are as follows: 1. Activating the electronic parking brake: When the car is stopped, shift to P or N gear, press the brake pedal, and pull up the electronic parking brake switch until the indicator light comes on. If the car is turned off without activating the electronic parking brake, most vehicles will automatically engage the electronic parking brake. 2. Deactivating the electronic parking brake: Press the electronic parking brake switch while holding down the brake pedal. When the indicator light turns off, it means the electronic parking brake is deactivated.

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Does the Audi A4 meet the China 6 emission standard?

Audi A4 meets the China 6 emission standard. Here are the relevant details: 1. The currently available Audi A4 models come in both China 5 and China 6 versions. The Audi A4 is positioned as a mid-size sedan, available in both front-wheel drive and all-wheel drive versions, with a length of 4818mm, width of 1843mm, height of 1432mm, and a wheelbase of 2908mm. 2. The standard features of the 2019 Audi A4 include: driver and front passenger airbags, side head airbags, tire pressure monitoring system, ABS anti-lock braking system, brake force distribution, brake assist, traction control, electronic stability control, hill start assist, and auto hold. In terms of power, the 2019 Audi A4L is equipped with 1.4T and 2.0T engines, paired with a 7-speed dual-clutch transmission. The official fuel consumption per 100 kilometers announced by the Ministry of Industry and Information Technology is 6.1L.

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What does NVH performance mean?

Should a Punctured Tire Be Repaired or Replaced?

What Causes Engine Breather Pipe to Spray Engine Oil?

Will starting the car in D gear cause damage?

How to Identify Inventory Vehicles?

Is the Electronic Parking Brake Prone to Malfunction?

Does the Audi A4 meet the China 6 emission standard?

What is the service life of a child safety seat?

Is Car Waxing Good?

What is the method for replacing the battery in a Citroën key?

Can Hybrid Vehicles Get Green License Plates?