Usually, some car owners go to 4S stores or some private repair shops for maintenance when their car has problems or needs to be serviced. I don't know if car owners have ever encountered a situation where they go for repairs or regular maintenance, but when they pay, there are many maintenance services on the bill that they didn't know about before. But since the work has already been completed, there is not much need to go back to the bottom and ask clearly. It's just like you've suffered a dumb loss.
This is a way of making money for repair shops to "kill first, then act later, and loot while the fire is raging", commonly known as "hitting the stuffy bag". Some greedy repair shop owners even secretly exchange low-end parts for high-end parts on their cars, with common exchange points being car clutch parts, transmission parts, braking parts, etc. Then deceive the car owner to say that the accessory is damaged. When repairing the car, it is not stated which problems are present. It is only when the car is delivered that it is discovered that there are still some problems that have been fixed, and the bill often startles people. The most common scenario is that without being informed, the car is equipped with various so-called "expensive" additives, and maintenance fees suddenly increase by several hundred yuan.
Adding a few hundred yuan for maintenance without any reason is not bad enough, and the most despicable thing is to replace the car's components. Those car clutch accessories, transmission system accessories, etc. are originally original accessories and form a harmonious whole with the car. After being replaced, it will definitely not be as good as before, and there is a high possibility of frequent problems.