Refrigerant Pressure Sensor
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2010 BMW M5, 2009 BMW M5, 2008 BMW M5, 2008 BMW 760Li, and 2007 BMW M5. However, it is still accessible from the selected car via links, so may be relevant.
This sensor is located in the pressure line between the condenser and the evaporator. Depending on the sensor signal, the A/C compressor is switched off by the IHKA control unit in the event of excessively high system pressure.