Why does the Volkswagen Jetta make noise when the air conditioning is turned on?

Why is the steering wheel not straight after emergency braking?

After emergency braking, the steering wheel may not be straight due to tire issues or braking illusions. Tire Issues: If there is a problem with the car tire, the steering wheel will naturally be affected. A common scenario is a flat tire, where the tire is punctured by sharp objects like metal or nails, leading to insufficient tire pressure in one tire and increased resistance while driving. This causes the steering wheel to feel misaligned during movement. The owner should promptly inspect the vehicle. Inspection and Solution: Check whether the tire pressure of each tire has decreased. If only one tire shows reduced pressure, inspect the tire tread for puncture marks. If the tire is indeed punctured, avoid immediately removing the nail, as this could cause complete loss of air pressure and render the vehicle undrivable. Drive to a repair shop to determine whether a puncture repair or full tire replacement is needed. Braking Illusion: Experienced drivers know that the braking system includes disc brakes and drum brakes, which convert foot pressure into hydraulic force. This can sometimes create the illusion of braking, making the car feel heavier and causing the steering wheel to pull to one side. Solution: Use a jack to lift the wheel with sluggish braking. Rotate the tire to check for excessive resistance. Loosen the wheel bolts to prepare for drum removal. Lightly tap the drum's circumference with a hammer—sometimes this can correct the issue. If unsuccessful, the problem may lie with internal piston fixation, requiring drum removal for repair. In such cases, it's best to consult a professional mechanic. Braking Precautions: Steering Wheel Pulls When Braking: If the steering wheel pulls to one side during braking, the brake calipers may be applying uneven force to the pads. This issue is hard to detect due to the high rotation speed of the brake discs. Brake Pedal Sinks: If the pedal height increases after repeated braking during driving, it likely indicates fluid leakage. Brake Vibration: Warped brake discs directly cause brake vibration. Solutions include resurfacing or replacing the discs, typically seen in older vehicles. Weak Braking: Weak braking often results from pressure loss in the hydraulic lines. Immediate workshop inspection is recommended to avoid serious consequences.

16

1

Share

What is the 0-100 km/h acceleration time of the Touareg?

According to official data, the Touareg is available in two engine displacements: 2.0T and 3.0T. The 2.0T model accelerates from 0 to 100 km/h in 6.8 seconds, while the 3.0T model achieves this in 5.9 seconds. Factors affecting a vehicle's 0-100 km/h acceleration time include: Torque: Torque, in simple terms, represents the strength of the engine. The greater the torque, the stronger the force pushing the vehicle, resulting in faster acceleration. The Touareg X has a maximum torque of 320 Nm and accelerates from 0 to 100 km/h in 9.9 seconds. The 2.0T two-wheel-drive Touareg has a torque of 370 Nm and accelerates from 0 to 100 km/h in 6.8 seconds. Transmission efficiency: The transmission acts as a medium for power delivery and inevitably involves power loss. Higher transmission efficiency leads to better acceleration performance. Generally, transmission efficiency ranks as follows: manual transmission > dry dual-clutch transmission > wet dual-clutch transmission > AT transmission > CVT transmission. The 2.0T two-wheel-drive Touareg is equipped with an 8-speed automatic manual transmission. Power-to-weight ratio: The relationship between horsepower and vehicle weight is called the power-to-weight ratio (measured in Hp/T). A higher power-to-weight ratio results in faster acceleration. The Touareg X has a power-to-weight ratio of 93 Hp/T and accelerates from 0 to 100 km/h in 9.9 seconds. The 2.0T Touareg has a power-to-weight ratio of 97 Hp/T and accelerates from 0 to 100 km/h in 6.8 seconds.

16

2

Share

Are Cadillac cars fuel-consuming?

Cadillac cars are fuel-consuming, with a fuel consumption rate 2-3L/100km higher than average cars. Taking the Cadillac XT4 as an example, the details are as follows: 1. Fuel consumption and body size: The XT4 has a fuel consumption of 10.3 liters per 100 kilometers. The dimensions of this car are 4600mm in length, 1881mm in width, 1627mm in height, with a wheelbase of 2779mm. 2. Engine: The XT4 is equipped with a 2.0T engine across all models. This engine has a maximum power of 177kw and a maximum torque of 350N·m. The engine reaches its maximum power at 5000 rpm and its maximum torque between 1500 to 4000 rpm.

19

4

Share

What does VCU mean in new energy vehicles?

In new energy vehicles, VCU is the core electronic control unit that realizes vehicle control decision-making. The following is a related introduction: Working principle of VCU: VCU determines the driver's driving intention by collecting signals such as the accelerator pedal, gear, and brake pedal. After monitoring the vehicle status information, VCU makes judgments and processes, and sends vehicle operation status control commands to the power system and power battery system to control the working mode of the vehicle's auxiliary power system. Functions of VCU: Receiving and processing the driver's driving operation instructions; receiving and processing information from various components, and feeding back current energy status information; judging and storing system faults, recording faults that occur, etc.

18

3

Share

What is the fuel consumption of the BYD Pro Song?

The fuel consumption of the BYD Song Pro is 8.5 liters per 100 kilometers. Relevant information is as follows: 1. Dimensions: The Song Pro is a compact SUV under BYD, with a wheelbase of 2712 mm, and its length, width, and height are 4650 mm, 1860 mm, and 1700 mm respectively. 2. Powertrain: The Song Pro is equipped with a 1.5-liter turbocharged engine across the entire lineup. The 1.5-liter turbocharged engine of the Song Pro has a maximum power of 118 kW and a maximum torque of 245 Nm. This engine can deliver its maximum torque starting from 1600 rpm and can sustain it up to 4000 rpm.

6

5

Share

How Often Should the Passat Brake Discs Be Replaced?

There is no fixed replacement cycle for Passat brake discs. When the wear indicators disappear, it indicates that the brake discs need to be replaced. Below is relevant information: 1. Minor Rust: This can be polished away through normal braking. Friction between the brake pads and brake discs will occur, and after multiple braking actions, the rust can be removed, restoring normal functionality. 2. Severe Rust: When the brake discs exhibit severe rust, normal braking cannot remove the rust. The rust on the brake discs will create an uneven surface, leading to steering wheel vibration during braking and unusual noises. In such cases, the brake pads can be removed for polishing, but this will shorten the lifespan of the brake discs. It is best to replace them with new brake discs.

15

3

Share

Why does the Volkswagen Jetta make noise when the air conditioning is turned on?

Why is the steering wheel not straight after emergency braking?

What is the 0-100 km/h acceleration time of the Touareg?

Are Cadillac cars fuel-consuming?

What does VCU mean in new energy vehicles?

What is the fuel consumption of the BYD Pro Song?

How Often Should the Passat Brake Discs Be Replaced?

What is a Vehicle Certificate?

How to Sleep Safely with the Air Conditioning On in the Car?

What to Do If Caught Driving Without License and Vehicle Registration Certificate by Traffic Police?

What to Pay Attention to When Buying a Car?