Is it necessary to replace steel car rims with aluminum ones?

Consequences of Not Performing Wheel Alignment?

The consequence of not performing wheel alignment is that the vehicle will continuously pull to one side, which may lead to more serious safety accidents. Generally, wheel alignment is performed when the vehicle starts to pull to one side. After driving for a period of time, it is inevitable that the tire angles will become abnormal due to road bumps and component wear, causing the vehicle to drift. Methods to determine if wheel alignment is problematic: 1. Driving in a straight line: Choose a flat and straight road, ensure that the tire pressure of all four tires is consistent, straighten the steering wheel, then release the steering wheel and press the accelerator. If the vehicle can drive straight, it means the wheel alignment is fine; if the vehicle slightly drifts to the left or right with a minimal angle, it can be ignored; if the drift is severe, it indicates a wheel alignment issue. 2. Check for uneven tire wear: Owners should regularly inspect their tires, as they are the only part of the vehicle in contact with the ground. If the tires show uneven wear—one side is heavily worn while the other remains in good condition, also known as "tire cupping"—it indicates abnormal wheel alignment. Under normal circumstances, tire wear should be relatively even. 3. Lift the vehicle and shake the tires: Use a jack to lift the vehicle, leaving the tires in an unsupported state. Place your hands on the top and bottom or left and right of the tire, then apply slight force to shake the tire up and down or left and right. If the tire wobbles, the bearing may be damaged; bearing damage is also a sign of wheel alignment issues.

6

0

Share

How to Rematch the Tire Pressure Monitoring System on the Envision?

The method to rematch the tire pressure monitoring system on the Envision: Start the vehicle, locate and press the SET button on the left side of the multifunction steering wheel, then press the checkmark button on the right side of the multifunction steering wheel to confirm the operation. Once matched successfully, the tire pressure display on the central dashboard will return to normal. There are three commonly used tire pressure monitoring methods: Direct Tire Pressure Monitoring: The direct tire pressure monitoring system uses pressure sensors installed in each tire to directly measure the tire pressure. It transmits the pressure information from inside the tire to a central receiver module via a wireless transmitter, then displays the data for each tire's pressure. The system automatically alerts when the tire pressure is too low or there is a leak. Indirect Tire Pressure Monitoring: When the pressure in a tire decreases, the vehicle's weight causes the rolling radius of that wheel to become smaller, making it rotate faster than the other wheels. By comparing the rotational speed differences between tires, the system monitors tire pressure. The indirect tire pressure warning system essentially relies on calculating the rolling radius of the tires to monitor pressure. Introduction to the Tire Pressure Monitoring System (TPMS): It combines the advantages of both systems mentioned above. Direct sensors are installed in two diagonally opposite tires, and a four-wheel indirect system is also equipped. Compared to using only a direct system, this hybrid system can reduce costs and overcome the limitation of the indirect system, which cannot detect when multiple tires simultaneously have low pressure. However, it still cannot provide real-time data of the actual pressure in all four tires as the direct system does.

17

4

Share

How many kilometers do brake pads need to be replaced?

Brake pads generally need to be replaced every 30,000 to 50,000 kilometers. The driving conditions of each vehicle and the driving habits of each driver will affect the service life of the brake pads. The thickness of new brake pads is usually about 1.5cm. As they wear down through daily friction, when the thickness of the brake pads is only about 1/3 of the new ones, the frequency of inspection should be increased, and new brake pads should be prepared for replacement at any time. There are small raised indicators on both sides of the brake pads. When the brake pads are level with these indicators (2-3mm), it means they have reached their limit and must be replaced. Method for replacing brake pads: Gather all the necessary tools and parts, loosen the wheel bolts by half a turn, but there is no need to completely remove them. Use a jack to lift one side of the vehicle at the designated lifting point. The vehicle only needs to be lifted until the wheel that requires brake pad replacement is slightly off the ground. Then, all the wheel bolts can be unscrewed and the wheel can be removed. Place the removed wheel under the brake disc to prevent the vehicle from falling in case the hydraulic jack loses pressure, which could cause injuries. To replace the brake pads, only the two bolts securing the brake caliper need to be removed. After loosening these two bolts, the brake caliper can be taken off. Since the brake caliper is connected to flexible hydraulic lines, be careful not to pull too hard; simply rest it on the nearby front axle suspension. Next, grind the brake pads to create a chamfer on the edge that contacts the brake disc. When replacing both the brake pads and the brake disc at the same time, there is no need to grind the chamfer; they can be installed directly.

15

1

Share

Which gear should be used to start an automatic transmission car?

To start an automatic transmission car, you need to shift to N gear first, then ignite, and then shift to D gear to start moving forward. Here are the detailed introductions of automatic transmission gears: 1. P gear is the parking gear: When the gear lever is in the P gear position, the transmission is in neutral inside, but the output shaft is mechanically locked. At this time, the car will stop in place even without stepping on the brake. It is generally used for long-term parking of the car. When shifting into P gear, the car must be completely stationary. Do not shift into P gear when the car is not fully stopped, and the handbrake must be engaged. When parking on a slope, you need to engage the handbrake first and then shift into P gear. 2. R gear is the reverse gear: When the gear lever is in the R gear position, the rotation direction of the transmission output shaft is opposite to that of the engine, allowing the car to move backward. When shifting into R gear, the car must be completely stationary. Do not shift into R gear when the car is not fully stopped. 3. N gear is the neutral gear: When the gear lever is in the N gear position, the gears inside the transmission are in idle state, and the clutch is not engaged. At this time, the load on the transmission is the smallest. N gear is generally used for short-term parking, such as waiting for a traffic light, and the transmission should also be in N gear when the car is being towed. 4. D gear is the driving gear: When the gear lever is in the D gear position, the gears inside the transmission automatically switch between the lowest gear and the highest gear according to the set shifting rules based on factors such as vehicle speed and throttle opening. In most cases, you can drive using D gear.

16

5

Share

What is the difference between a 4S store and a direct store?

The main differences between a direct store and a 4S store: A 4S store refers to an automobile sales service station that integrates vehicle sales, spare parts supply, after-sales service, and information feedback. It directly collaborates with manufacturers and can receive relevant technical and vehicle source information support from them. On the other hand, a direct store is only responsible for the sales of motor vehicles, and the vehicles in direct stores come from 4S stores. Below are the relevant introductions: 1. Explanation of 4S stores: (1) A 4S store actually refers to an automobile sales service shop that integrates car sales (sale), spare parts supply (sparepart), after-sales service (service), and information feedback (survey). (2) Because 4S stores can provide multiple services, the scale and number of personnel in the store are relatively large. (3) The establishment of a 4S store will receive support from the automobile manufacturer, specifically technical support, vehicle source support, information support, etc. At the same time, the manufacturer will also require the 4S store to strive to build a good brand image and complete quarterly tasks. 2. Explanation of automobile direct stores: (1) Automobile direct stores are only responsible for selling cars and do not provide services such as license plate registration or insurance. Therefore, the storefront of a direct store does not need to be large; it only needs to accommodate a few cars. (2) The vehicle sources of automobile direct stores come from 4S stores, so automobile direct stores are also called secondary dealers. Because direct stores are not regulated by manufacturers, most of their vehicle sources come from 4S stores, with a small portion coming from unknown channels. (3) Similarly, because they are not regulated by manufacturers, the prices of direct stores are lower than those of 4S stores, which is the foundation of their survival.

8

4

Share

How Many Exam Attempts Are Allowed for Subject One and Subject Four?

According to the "Regulations on the Application and Use of Motor Vehicle Driving Licenses," there is no limit on the number of exam attempts for driving test Subject One and Subject Four. If you fail the exam, you can schedule another attempt. Each scheduled exam provides two opportunities. If you fail both attempts, you can only retake the exam until you pass. Both Subject One and Subject Four are theoretical exams and are part of the motor vehicle driving license assessment. The main differences between Subject One and Subject Four include: the number of questions, question types, exam content distribution, and exam focus. Question Count: The most obvious difference between Subject One and Subject Four is the number of exam questions. Subject One has 100 questions, while Subject Four has only 50 questions. During the Subject One exam, if you answer more than 10 questions incorrectly, the exam will automatically submit. For Subject Four, the exam will automatically submit if you answer more than 6 questions incorrectly. Question Types: Subject One consists of 100 questions, each worth 1 point, with a total exam time of 45 minutes. The question types include true/false and single-choice questions, with a full score of 100. Subject Four consists of 50 questions, each worth 2 points, with a total exam time of 45 minutes. The questions are primarily presented in the form of case studies, images, or animations, and the question types include true/false, single-choice, and multiple-choice questions, with a full score of 100. Exam Focus: Subject One primarily tests basic knowledge of road driving, while Subject Four focuses on safe and civilized driving practices. In simple terms, Subject One tests how to drive, while Subject Four tests how to drive safely. Although the difference is just two words ("safe driving"), the focus is entirely different. Exam Content Distribution: Subject One exam content breakdown: Driving license and motor vehicle regulations account for 20%; Road traffic conditions and regulations account for 25%; Road traffic safety violations and penalties account for 25%; Road traffic accident handling regulations account for 10%; Basic knowledge of motor vehicles accounts for 10%; Local regulations account for 10%. Subject Four exam content breakdown: Safe driving knowledge accounts for 20%; Civilized driving knowledge accounts for 18%; Comprehensive application of road traffic signals in traffic scenarios accounts for 8%; Safe driving knowledge under adverse weather and complex road conditions accounts for 16%; Emergency avoidance knowledge accounts for 12%; Analysis of typical accident cases accounts for 6%; Knowledge of traffic accident rescue and handling of common hazardous chemicals accounts for 10%; Local test questions account for 10%. The driving test consists of three subjects: Subject One, Subject Two, and Subject Three. Subject One refers to the exam on road traffic safety laws, regulations, and related knowledge. Subject Two refers to the field driving skills exam. Subject Three is divided into two parts: road driving skills and the safe and civilized driving knowledge exam. The safe and civilized driving knowledge exam is conducted after Subject Three, so it is commonly referred to as Subject Four. However, the official term (as per the Ministry of Public Security Order No. 123) does not include "Subject Four."

10

0

Share

Is it necessary to replace steel car rims with aluminum ones?

Consequences of Not Performing Wheel Alignment?

How to Rematch the Tire Pressure Monitoring System on the Envision?

How many kilometers do brake pads need to be replaced?

Which gear should be used to start an automatic transmission car?

What is the difference between a 4S store and a direct store?

How Many Exam Attempts Are Allowed for Subject One and Subject Four?

What does the internal and external circulation of a car mean?

Does a car battery need to be replaced when it has 40% remaining charge?

How to reset the tire pressure light on the new Lingpai?

Is it harmful to the car if the window is left open and it rains?