Replacing the three filters is the easiest to be tampered with.

The most easily tampered with is the three filters of the car. The three filters must be replaced during car maintenance. However, some repair shops often do something when replacing the three filters for vehicles. Moreover, car owners generally cannot know the real situation of replacing the three filters, and they will not care if they change a few. It's all up to the repair shop! Therefore, some informal repair shops will cut corners and only replace two of the three filters at most. In order to increase profits, either the air filter or the gasoline filter should be omitted. Generally speaking, the three filters should be replaced once when the vehicle travels to 15000 to 20000 kilometers, that is to say, in terms of maintenance times, it is enough to change once every once in a while.

It takes some brains to change the oil.

In order to save money, the repair shop will also think when changing the oil. The oil demand of each car is different. Generally, Jetta needs 4 liters of engine oil, and Fukang needs at least 3.2 liters. Alto needs about 3 liters. The standard is to add oil to the upper limit of the bending area of the dipstick. At present, the way to judge whether the oil has been changed is to show the owner the mimeographed oil dipstick after the maintenance worker measures it with the oil dipstick. However, this does not mean that new engine oil has been replaced, because in order to reduce the cost, maintenance workers usually measure the remaining amount of engine oil in the car with a dipstick before adding engine oil to the car, and then make up the insufficient part. When the owner came to pick up the car, the maintenance union took a used empty oil bottle and told the owner the brand and quantity of oil to be replaced. Under normal circumstances, after the vehicle is filled with oil, if the vehicle is not started, the oil is slightly transparent when the cover is opened, but once the vehicle is started, the oil will become turbid. So after adding the oil, the repair union took the car out for a spin, so that the owner could not tell whether it was a new bottle of oil or a mixture of old and new oil. This kind of mixed oil is harmful to vehicles.

Car owners must read the letter for maintenance.

For these situations encountered in vehicle maintenance, first of all, vehicles mainly choose maintenance stations with comprehensive maintenance qualifications, and regular maintenance stations must have business licenses, business licenses, technical inspection certificates and road transport business licenses.

For vehicles that need secondary maintenance and vehicle maintenance, only maintenance enterprises with primary and secondary qualifications are qualified.

In addition, in the process of maintenance, if spare parts need to be replaced, be sure to read clearly the factory name, address, telephone number, registered trademark, implementation standard and other items on the outer packaging, and indicate the product model, origin and specifications on the maintenance list; Don't ignore your right to know, seeing is believing. At the same time, the owner can also explain the price according to the maintenance management system of this province.

Car owners had better sign three parts with the repair shop before maintenance: maintenance record, settlement list and maintenance contract. This can be used as a basis in future disputes. Yan said that the owner can observe some details during the acceptance to test the effect of maintenance. For example, the bolts fixed or connected to an assembly should all be of the same label or model, especially the bolts in key parts are not allowed to be replaced by other bolts.