In conclusion, there are four different sizes for auto A/C hose in the most common car air conditioning system. If the vehicle is a bus or coach, it will be a bigger A/C hose, like 7/8 inch and 1 1/8 inch. Make sure which part of A/C hose is broken, like hose from compressor to condenser, you can know the exactly hose size.

Quality of Hoses: Use high-quality, automotive-grade air conditioning hoses that are designed for the specific requirements of bus air conditioning systems. Quality hoses will have better resistance to pressure, temperature, and refrigerant chemicals.

The power steering hose on a BMW E38 is an essential component that helps to transmit power steering fluid throughout the system, allowing for smooth and easy steering. This hose is responsible for carrying the pressurized fluid from the power steering pump to the steering gear, ensuring that the steering wheel can be turned with minimal effort.