A device for measuring the temperature in the interior of a vehicle, comprising: - a receiving means on the rear side of a cover element which is arranged adjacent to the interior, - a plug-in housing for plugging into the receiving means, - wherein the receiving means comprises a receiving space, and the cover element inside the receiving space comprises a through-going opening, and the plug-in housing comprises a plug-in end for plugging into the receiving means, - a locking means for lockingly connecting the plug-in housing to the receiving means with the plug-in end of the plug-in housing being plugged into the receiving space, - an interior temperature sensor arranged at and/or in the plug-in end of the plug-in housing, - wherein the interior temperature sensor projects beyond the plug-in end of the plug-in housing, and - a biasing means for biasing the plug-in housing away from the cover element for assuming a defined plug-in position of the plug-in housing when the plug-in end of the plug-in housing is plugged into the receiving space when being locked with the receiving means, and the interior temperature sensor is arranged in the through-going opening of the cover element, characterized by - a circuit board arranged in the plug-in housing and having a front end facing the plug-in end of the plug-in housing, wherein the circuit board carries the interior temperature sensor at least partially projecting beyond the front end thereof and possibly further components as well as conductor traces, and wherein the plug-in housing comprises at its plug-in end a through-going opening through which the interior temperature sensor extends and projects beyond the plug-in end of the plug-in housing, - wherein the plug-in housing comprises at its rear end facing away from the plug-in end a closing element for receiving a plug for the electric connection, and the closing element comprises a biasing means for biasing the circuit board towards the plug-in end of the plug-in housing. - a receiving means on the rear side of a cover element which is arranged adjacent to the interior, - a plug-in housing for plugging into the receiving means, - wherein the receiving means comprises a receiving space, and the cover element inside the receiving space comprises a through-going opening, and the plug-in housing comprises a plug-in end for plugging into the receiving means, - a locking means for lockingly connecting the plug-in housing to the receiving means with the plug-in end of the plug-in housing being plugged into the receiving space, - an interior temperature sensor arranged at and/or in the plug-in end of the plug-in housing, - wherein the interior temperature sensor projects beyond the plug-in end of the plug-in housing, and - a biasing means for biasing the plug-in housing away from the cover element for assuming a defined plug-in position of the plug-in housing when the plug-in end of the plug-in housing is plugged into the receiving space when being locked with the receiving means, and the interior temperature sensor is arranged in the through-going opening of the cover element, - a circuit board arranged in the plug-in housing and having a front end facing the plug-in end of the plug-in housing, wherein the circuit board carries the interior temperature sensor at least partially projecting beyond the front end thereof and possibly further components as well as conductor traces, and wherein the plug-in housing comprises at its plug-in end a through-going opening through which the interior temperature sensor extends and projects beyond the plug-in end of the plug-in housing, - wherein the plug-in housing comprises at its rear end facing away from the plug-in end a closing element for receiving a plug for the electric connection, and the closing element comprises a biasing means for biasing the circuit board towards the plug-in end of the plug-in housing.