Within your car air conditioning system, the accumulator drier is a container that receives refrigerant liquid, oil and vapour from the evaporator. The primary function of the accumulator drier is to separate the vapour from the oil and the liquid and then release it to the compressor. Its secondary role is to absorb moisture.
Unless you are very familiar with car air conditioning systems, then any problems will need to be diagnosed by a mechanic. Accumulator driers for all types of cars are easy to source if that is the part that you need. Show Less