What is the reason for one side of Audi headlight not working?

Why Are the Bolts Shorter After Changing the Wheel Hub?

Excessive force when changing the wheel hub can cause the bolt shank to break. Root cause of bolt breakage: If a torque wrench is used for tire bolts, they won't break. Bolts that break are often those previously tightened with an impact wrench. To improve efficiency, repair shops typically set the impact wrench to maximum torque, gradually stretching the bolts over time, leading to breakage. How to remove a broken bolt when changing a tire: Replacing a tire bolt requires removing the brake disc. Over time, the brake drum can rust, and if it's a drum brake, prolonged use can create a step due to wear. The brake disc can get stuck by the brake pads, making it difficult to remove. This vehicle is designed with two screw holes on the disc, allowing two long screws to easily push the disc out—a very user-friendly design. Without these screw holes, one would have to use a hammer with a wooden block to slowly tap it out.

3

1

Share

Do China V Vehicles Need to Add Urea?

China V vehicles need to add urea. Most China V vehicles use the SCR (Selective Catalytic Reduction) technology for engine exhaust after-treatment. The characteristic of this technology is that it must use automotive urea solution to reduce NOx in engine exhaust. Therefore, China V vehicles must not run out of automotive urea solution in the urea tank while driving. Origin of Automotive Urea: Automotive urea solution was first used in Europe, where it is called AdBlue. In North America, it is referred to as DEF (Diesel Exhaust Fluid). In China, it is called automotive urea solution or "automotive denitration agent." However, it is now generally referred to as "automotive urea" in China. Function of Automotive Urea: Automotive urea solution is key to reducing pollutant emissions from diesel vehicles. It is a urea-based chemical reactant, composed of high-purity urea and deionized water, forming a solution with a concentration of 32.5%. The application of automotive urea solution in SCR systems is crucial for engine exhaust emissions to meet China IV and higher emission standards.

14

0

Share

What does the airbag warning light in a car indicate?

The airbag warning light in a car indicates a problem with the airbag system. Introduction to Airbags: The airbag system is a passive safety protection system that, when used in conjunction with seat belts, provides effective collision protection for occupants. In the event of a car collision, airbags can reduce head injury rates by 25% and facial injury rates by approximately 80%. How Airbags Work: The principle of airbags is that when a collision occurs while the car is in motion, the airbag sensor receives the impact signal. If the impact reaches the specified intensity, the sensor activates and sends a signal to the electronic control unit. Upon receiving the signal, the electronic control unit compares it with its stored data. If the conditions for airbag deployment are met, the drive circuit sends an activation signal to the gas generator in the airbag module.

11

5

Share

Can You Brake When Making a U-Turn?

You can brake when making a U-turn. Situations where U-turns are prohibited are as follows: U-turns are prohibited where there are 'No U-turn' signs or 'No Left Turn' signs: If there is a sign prohibiting U-turns, then U-turns are not allowed at that intersection. The action of making a U-turn is an extension of a left turn, so if there is a 'No Left Turn' sign at an intersection, U-turns are also prohibited there. U-turns are prohibited at crosswalks: U-turns are not allowed at crosswalks. If making a U-turn is permitted at an intersection, you must cross the crosswalk before turning around; do not make a U-turn on the crosswalk. U-turns are prohibited when there is no left-turn lane: Even if you are in the leftmost lane, if there is no sign permitting left turns, U-turns are not allowed. U-turns are prohibited within the second left-turn lane: When a vehicle is in the second left-turn lane, it cannot make a U-turn. In the absence of any directional signs, vehicles can only make U-turns from the innermost left-turn lane. U-turns are prohibited at solid yellow lines: Do not make a U-turn at a solid yellow line. Even if there is a sign permitting U-turns, you must wait for the green light and cross the stop line before turning around. U-turns are prohibited on highways: Crossing the central divider to make a U-turn on a highway is illegal and will result in a fine and 12 demerit points. If you miss an exit on the highway, continue driving to the next exit to leave the highway; never attempt an illegal U-turn out of recklessness.

11

2

Share

Can Plastic Car Bodies Be Waxed?

Generally, only painted plastic car bodies, such as bumpers, can be waxed, while unpainted ones cannot. Plastic Car Bodies: In a car's exterior, plastic parts include the front and rear bumpers, as well as the deflectors and fenders. For example, bumpers are made of plastic only in the deformation zones, primarily to reduce impact forces and protect pedestrians and the vehicle. The fenders, located at the bottom of the car, prevent damage from gravel and stones kicked up during high-speed driving. Waxing: The primary purpose of car waxing is waterproofing and protection against acid rain. The wax reduces water droplet adhesion on the car body by 50% to 90%. It also protects against high temperatures and UV rays, as prolonged exposure to sunlight can cause paint to fade and age. The wax film reflects some of the light, effectively preventing paint aging. Lastly, car wax prevents static electricity and dust accumulation.

1

5

Share

Will the exhaust pipe temperature sensor still consume urea if it is damaged?

The exhaust pipe temperature sensor will no longer consume urea if it is damaged. Introduction to the automotive nitrogen-oxygen sensor: The nitrogen-oxygen sensor, abbreviated as NOX sensor, is used to detect the nitrogen oxide content in the engine exhaust. Working principle: Basic working principle of the nitrogen-oxygen sensor: Under certain conditions, the oxygen concentration difference on both sides of the zirconia generates a potential difference, and the greater the concentration difference, the greater the potential difference. The oxygen content in the atmosphere is 21%. The exhaust gas from rich mixture combustion contains virtually no oxygen, while the exhaust gas from lean mixture combustion or misfire contains more oxygen, but still much less than the oxygen in the atmosphere. Under high temperature and platinum catalysis, negatively charged oxygen ions adsorb on the inner and outer surfaces of the zirconia sleeve. Since there is more oxygen in the atmosphere than in the exhaust gas, the side of the sleeve connected to the atmosphere adsorbs more negative ions than the exhaust side, creating an electromotive force due to the ion concentration difference.

6

1

Share

What is the reason for one side of Audi headlight not working?

Why Are the Bolts Shorter After Changing the Wheel Hub?

Do China V Vehicles Need to Add Urea?

What does the airbag warning light in a car indicate?

Can You Brake When Making a U-Turn?

Can Plastic Car Bodies Be Waxed?

Will the exhaust pipe temperature sensor still consume urea if it is damaged?

What is the diameter of the cup holder in the new Sylphy?

What does Intelligent Navigation mean?

What is Intelligent Navigation?

How to Handle Steering Misalignment After Replacing the Steering Gear?