What Causes the Brake Squealing in the Golf VII?

What Causes the Red Key Light to Flash on the Mazda3 Axela?

The flashing red key light on the Mazda3 Axela could be due to insufficient or depleted battery in the key fob, in which case replacing the battery should resolve the issue. It may also occur if the key is outside the operational range and the vehicle cannot detect it—simply bring the key within the operational area. Below is some relevant information about the Mazda3 Axela: The Mazda3 Axela is equipped with two engine options, a 1.5L naturally aspirated engine and a 2.0L naturally aspirated engine. The 1.5L naturally aspirated engine delivers 117 horsepower and a maximum torque of 148 Nm, with the maximum power achieved at 6,100 rpm and the maximum torque at 3,500 rpm. The 2.0L naturally aspirated engine produces 158 horsepower and a maximum torque of 202 Nm, with the maximum power reached at 6,000 rpm and the maximum torque at 4,000 rpm.

4

5

Share

What Causes a Spongy Brake Pedal?

The causes of a spongy brake pedal generally include the following. Here are the specific reasons: 1. Mixing brake fluids of different brands, which reduces braking performance, or continuing to use brake fluid beyond the manufacturer's recommended replacement period, causing the brake fluid to deteriorate and its boiling point to drop. 2. Air in the brake fluid. 3. External rubber damage or bulging of the brake hose leading to pressure loss. 4. Leakage or poor sealing of the master cylinder and wheel cylinders. 5. Additionally, check whether the brake pads are original equipment. As a critical component for safe driving, the braking system should be given special attention by every driver. Before each drive, test the condition of the brake pedal. Before starting the engine, the brake pedal should feel very firm; after the engine is running normally, the brake pedal may sink slightly, which is normal.

4

1

Share

How Many Chances Are There for the Subject 1 Test?

There is no limit to the number of attempts for the Subject 1 driving test. According to the "Regulations on the Application and Use of Motor Vehicle Driving Licenses," candidates can take the Subject 1 test twice on the same day. If the first attempt is unsuccessful, a free retake is allowed for the second attempt. If the second attempt also fails, the Subject 1 test is terminated for that day, and the candidate must wait ten days before scheduling another test. Subject 1, also known as the theoretical driving test or driver's theory test, is part of the motor vehicle driving license assessment. The test covers fundamental driving theory, road safety laws and regulations, local regulations, and related knowledge. The test is conducted on a computer, with a time limit of 45 minutes. A passing score for the Subject 1 test is 90 out of 100. The test consists of 100 questions, including single-choice and true/false questions, each worth 1 point. If a candidate answers 11 questions incorrectly, the system will automatically submit the test and end the session. Subject 1 test content includes: driving license and motor vehicle management regulations; road traffic conditions and rules; traffic safety violations and penalties; road traffic accident handling regulations; basic knowledge of motor vehicles; local regulations; knowledge of braking systems and safety devices for large and medium-sized passenger and freight vehicles; specialized knowledge for wheeled self-propelled machinery, trams, and trolleybuses. Notes for the Subject 1 test: Candidates should dress appropriately—no slippers are allowed. Electronic devices and bags are prohibited in the examination room. Bring your ID card and queue to enter the waiting hall. Observe the instructions and procedures displayed on the screen and store personal belongings in lockers before entering the examination room. Upon entering, verify your identity at the designated station, locate your assigned seat, and begin the test. Ensure the camera is aligned with you and follow test discipline. If you fail the first attempt, a retake is available on the same day. If you fail again, you must pay to reschedule. After the test, queue to collect your score report and sign it—unsigned reports are invalid. There is no limit to the number of Subject 1 test appointments. Each subject test allows one retake if the initial attempt fails. If the retake is not taken or is unsuccessful, the test session ends, and the applicant must reschedule. In contrast, Subject 2 and Subject 3 tests allow only five attempts each. Subject 2 and Subject 3 tests must be rescheduled ten days later. If the Subject 3 safe driving knowledge test is failed, the previously passed road driving skills test results remain valid. The driving test consists of three subjects: Subject 1, Subject 2, and Subject 3. Subject 1 refers to the traffic safety laws, regulations, and related knowledge test. Subject 2 refers to the field driving skills test. Subject 3 is divided into two parts: road driving skills and safe driving knowledge tests. The safe driving knowledge test is conducted after Subject 3, so it is commonly referred to as Subject 4. However, the official term (under the Ministry of Public Security's Order No. 123) does not include "Subject 4."

13

2

Share

Where is the engine code located on the BAIC BJ40?

The engine number of the Beijing BJ40 is located as follows: Open the hood and find the nameplate, which is generally on the fan frame at the front of the vehicle, either on the right side of the engine compartment or in the middle. It contains information such as the engine number, production date, displacement, and vehicle model. More details about the Beijing BJ40 are as follows: 1. In terms of appearance, the BAIC BJ40, with its hardcore SUV style, features many right-angle designs, exuding a strong masculine vibe. 2. For the interior, as an off-road model, it doesn’t have overly luxurious decorations. The simple and rugged design style is reminiscent of the "Wrangler." The switches for the windows and central locking are designed as toggle levers, giving a very retro feel. 3. In terms of power, the BJ40 is equipped with a 2.4L naturally aspirated engine, delivering a maximum power of 105kW and a maximum torque of 217Nm, paired with a 5-speed manual transmission. The new vehicle also features a mechanical part-time four-wheel-drive system and adopts a body-on-frame structure. Additionally, the Beijing Jeep BJ40 has a five-link non-independent rear suspension, providing better support for extreme off-roading.

17

3

Share

What is Automotive Thermal Efficiency?

Automotive thermal efficiency refers to the ratio between the mechanical work output by the engine and the chemical energy generated by fuel combustion, which evaluates how much heat is converted into effective work. More information about automotive thermal efficiency is as follows: 1. Engine thermal efficiency is one of the indicators for evaluating engine performance. The higher the engine's thermal efficiency, the better the fuel economy, performance, and emissions. Currently, mainstream engine thermal efficiencies worldwide mostly range between 30%-38%, with some exceptional ones exceeding 40%. 2. In addition to being related to the engine's thermal efficiency, a car's fuel consumption is also influenced by factors such as the vehicle's displacement, weight, aerodynamic drag, and tire width. Furthermore, a car's fuel consumption is also affected by the driver's driving habits.

8

4

Share

What is the principle of a manual transmission?

Here is an introduction to the principle of a manual transmission: 1. By shifting the gear lever, the driving gear on the intermediate shaft is switched, and the combination of gears of different sizes is engaged with the power output shaft, thereby changing the torque and speed of the driving wheels. 2. The engine's power input shaft is indirectly connected to the power output shaft through an intermediate shaft. The two gears (red) on the intermediate shaft and the two gears (blue) on the power output shaft rotate together with the engine output. However, without the engagement of the synchronizer (purple), the two gears (blue) can only idle on the power output shaft (i.e., they will not drive the output shaft to rotate). The synchronizer is in an intermediate state, which is equivalent to the transmission being in neutral. 3. When the gear lever is moved to the left, the synchronizer is moved to the right to engage with the gear, and the engine power is transmitted to the power output shaft through the gear on the intermediate shaft.

1

5

Share

What Causes the Brake Squealing in the Golf VII?

What Causes the Red Key Light to Flash on the Mazda3 Axela?

What Causes a Spongy Brake Pedal?

How Many Chances Are There for the Subject 1 Test?

Where is the engine code located on the BAIC BJ40?

What is Automotive Thermal Efficiency?

What is the principle of a manual transmission?

What Causes Brake Light Failure?

How to Deal with Frozen Windshield Washer Fluid?

What is the engine displacement of the BMW X1?

Is Manual Transmission More Fuel-Efficient or Automatic Transmission?