an evaporator device for ammonia to be used in mobile exhaust gas systems includes a basic body encompassing at least one inlet line and at least one outlet line . at least one heating element and at least one duct for connecting the inlet line to the outlet line are disposed within the basic body . the at least one heating element is in heat - conducting contact with an evaporation section of the at least one duct , while the at least one duct has a meandering course in the evaporation section . a motor vehicle and a method for producing an evaporator device , are also provided .