The thermostat on a 1999 Chrysler Sebring convertible is
located within the engine block itself, not easily accessible without mechanical knowledge and tools. You won't find a readily visible dial or control like a house thermostat. To replace it, you'll need to consult a repair manual specific to your car's engine (likely a 2.5L or a 2.7L V6). The manual will show you the exact location, removal procedure, and torque specifications.
Attempting to locate and replace it without the proper knowledge and tools is strongly discouraged, as you risk damaging your engine. It's best left to a qualified mechanic.
