99660641000 This is an oil or coolant temperature depending on the vehicle:
Porsche 986 Boxster 2.7L, 3.2L - for oil temperature
Porsche 996 Carrera - for oil temperature
Porsche 996 Turbo - for coolant & oil temperature
Porsche 996 GT3 - for coolant temperature
Porsche 997 2005-08 - for oil temperature
Porsche 997 GT3 - for coolant & oil temperature
Porsche 955 Cayenne S & Turbo - for coolant temperature