After buying a new car, car supplies are definitely indispensable, and reasonable car supplies are also necessary, such as floor mats, which are necessary to keep the floor clean and tidy, and are also easy to take care of. However, some automotive products cannot be used and even have a certain impact on driving safety.

Nowadays, many drivers can only drive away and are not familiar with the functions on the car. Some even cannot understand the basic air conditioning switches, and various comfort configurations, such as seat heating and ventilation.

It is common to have a left turn waiting area, which can be set up at slightly larger intersections. If the left turn is a red light, vehicles turning left at intersections without a waiting area should stop waiting at the stop line in front of the sidewalk. 

Many people who have bought a car and haven't driven it for a long time are around, and many cars remain stationary for a long time in underground garages and on the roadside in various communities.

Many cars have a common problem of engine oil leakage, which is actually a normal phenomenon. As the car ages, most engines will leak oil, with some leaking earlier and others leaking later. Because the engine is composed of many components, and the entire interior of the engine is filled with oil.

Car engines come with or without anti-theft systems. Generally, cars priced above 80000 yuan will come with anti-theft systems, while cars priced between 50000 and 60000 yuan generally do not. Cars that do not even have a remote control must not come with anti-theft systems. 

Drum brakes and disc brakes each have their own advantages and disadvantages, and they coexist in parallel. No one can completely replace them. Most cars use disc brakes, while most large trucks use drum brakes. A drum brake is a circular brake drum that contains two semi-circular brake shoes. 

Not being able to start a car is a common malfunction, especially for older cars, which can easily occur. The most common reason for not being able to start is the battery running low, which is also the easiest way in rescue operations. Just use another vehicle with electricity to get it started.

As long as you go to the 4S store for maintenance, in addition to regular oil changes, the reception staff will recommend that the owner do other maintenance items after reaching the mileage. Today we are going to talk about cleaning the throttle valve, which is a very common maintenance project.