The AC system has many key components: compressor, condenser, receiver dryer, evaporator, and hoses. For an AC system to work, it needs a gas or liquid substance called refrigerant (R-12 in older cars, R-134a in 1995 and newer cars). The job of an AC condenser is to convert the AC gas into a liquid form by cooling it. Some important information for selecting the correct AC condenser is the type of part needed; fitment position, required refrigerant, transmission type and date limitation of the unit. As car manufacturers regularly update certain peripherals and design of their models, some condensers will only be suitable for particular models of certain years.