When car owners do regular maintenance for their cars, the repair shop will deliberately increase unnecessary items or reduce the parts that need to be replaced in order to make huge profits. There are three aspects that are most likely to be concealed by the maintenance factory.

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Generally, the car needs to be maintained once every three months. This person introduces, at present, when the regular repair shop on the market carries on the maintenance to the vehicle, generally is according to the vehicle condition and the owner's use condition to determine the maintenance content. According to the source, some irregular repair shops will tell the owners to do the maintenance according to the instructions. This seems to be very professional, but it is not.

He said that because the vehicle's instructions are based on the general situation: the car owner will replace the parts after driving 5000-10000 km. So many car owners will choose to do maintenance or change parts after 5000 km. As a matter of fact, as long as the maintenance is carried out within 10000 km, it will not bring any loss to the vehicle. He stressed that he had roughly calculated that if a repair shop followed the lower limit of the manual for each vehicle that needed maintenance, the profit would be twice the original normal maintenance cost.

Replacing the three filters is easy to be done

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It's the three filters that are easy to be tampered with. This person mentioned that the three filters must be replaced when the car is being maintained. However, some repair shops often do something to replace the three filters. The car owners generally can't know the real situation of replacing the three filters, and they won't care about how many they have changed. It's all up to the repair shop to say! Therefore, some irregular repair factories will cut corners on their work and materials, and only two filters will be replaced at most. In order to increase profits, they will either save the air filter or omit the gasoline filter. Generally speaking, the three filters are changed once when the vehicle is driven to 15000-20000 km. That is to say, in terms of maintenance times, it is enough to replace the filter every other time. According to the person.

Changing the oil will also make a lot of effort

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In addition, the source also revealed that in order to save money, the repair shop will use some brains when changing the oil. The amount of oil required varies from vehicle to vehicle. In general, Jetta needs 4 liters of oil, Fukang needs at least 3.2 liters, and Alto needs about 3 liters. The standard is to fill the oil to the upper limit of the bend area of the dipstick. At present, the way to tell whether the oil has been changed is to show the oil mark of the oil dipstick to the owner after measuring with the dipstick. However, this does not mean that the new oil has been replaced. In order to reduce the cost, the maintenance workers usually measure the amount of remaining oil in the car with a dipstick before injecting oil into the vehicle, and then make up for the insufficient part. When the owner comes to pick up the car, the maintenance Union will take a used empty oil bottle and tell the owner the brand and quantity of oil to be changed.

In general, if you do not start the car after adding oil, the oil will be slightly transparent when you open the cover. However, once the vehicle is started, the oil will become turbid. Therefore, after adding the engine oil, the repairman will drive the car for a circle, so that the owner can't tell whether it is a bottle of new oil or a mixture of old and new engine oil. This mixture of oil is harmful to the vehicle. The person said.

The maintenance of car owners must be based on seeing

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For these situations encountered in vehicle maintenance, Yan section chief of Vehicle Department of Transportation Management Bureau of Jiangsu Provincial Transportation Department said: first of all, car owners should choose a maintenance station with comprehensive maintenance qualification when maintaining their cars. Regular maintenance stations must have industrial and commercial business license, business license, technical examination certificate and road transportation business license.

For vehicles requiring secondary maintenance and vehicle repair, only maintenance enterprises with class I and II qualification are qualified.

In addition, in the maintenance process, if you need to replace spare parts, you must see clearly the factory name, address, telephone number, registered trademark, executive standard and other items on the outer package, and indicate the product model, place of origin and specification on the repair list; do not ignore your right to know, but see for yourself. At the same time, car owners can also explain the price according to the province's maintenance management system.

The best way is for the owner to sign three major parts with the repair factory before maintenance: maintenance record, settlement list and maintenance contract. This can be used as a basis for future disputes. Yan said that car owners can observe some details during the acceptance to test the effect of maintenance. For example, the bolts fixed or connected on a certain assembly should be a label or a model, especially the bolts in key parts are not allowed to be replaced by other bolts.