How many kilometers does a BMW 3 Series need to add refrigerant?

[LaCooper]

There is no fixed interval for adding refrigerant to a car. It mainly depends on the cooling performance of the car's air conditioning system. If the cooling effect is normal, there is no need to add refrigerant. Introduction to car refrigerant: Car refrigerant, also known as car coolant or commonly referred to as Freon, is divided into environmentally friendly R134a and non-environmentally friendly R12. Since R12 severely damages the atmospheric ozone layer and produces a greenhouse effect, endangering the environment on which humans depend, it has been restricted and banned. Nowadays, most car air conditioning systems are environmentally friendly and use R134a refrigerant. Notes on adding refrigerant: There should be a proper measure when adding refrigerant to a car. Too much is not good, and too little will not achieve the desired effect. Whether adding or discharging refrigerant, professional tools and certain skills are required. It is recommended to go to a professional repair shop or 4S store for operation, which is more professional and safer.