Compatible with: 2011-2015 Mini Cooper Package Includes: 1x AC Condenser What is a condenser? A condenser is a heat exchanger that is part of a car's air conditioning system and is usually installed in the front of the car. Condenser function: The condenser first cools the refrigerant, which then becomes condensate by transferring heat to the ambient air flow passing through it. Common problems with condensers: 1. If the condenser leaks, you can see traces of moisture on the surface of the condenser. .