Part number 91157392500 is a new, unused, Genuine Porsche a/c expansion valve. The A/C expansion valve regulates the flow of Freon plus it supports the process of Freon changing from liquid to a gas (by allowing the Freon to expand). As the Freon expands, it becomes cooler just as it enters your car's evaporator core and cools your car's interior (with the help of your interior fan). Most expansion vales fail due to clogging, causing it to stick in an open, closed or partially open position and must be replaced.
Genuine Porsche parts represent the best value in Porsche parts. When you consider the quality, price, and lifetime that you get from the part you quickly realize there is no substitute for Genuine Porsche engineering
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