Method for checking sensor devices of vehicles , having the steps of: - detecting first data provided by a first of the vehicles by means of a central electronic computing device which is external to the vehicles , wherein the first data characterise at least one property of a stationary object detected by means of the sensor device of the first vehicle and a location (X) of the object on the earth determined by means of the first vehicle (step S1), wherein the sensor device of the first vehicle comprises at least one sensor which is designed as a radar sensor, laser sensor or camera; - detecting second data provided by a second of the vehicles by means of the central electronic computing device external to the vehicles , wherein the second data characterise the at least one property of the same stationary object detected by means of the sensor device of the second vehicle and a location (X) of the object on the earth determined by means of the second vehicle (step S2), wherein the sensor device of the second vehicle comprises at least one sensor which is designed as a radar sensor, laser sensor or camera; and - - checking the sensor devices depending on the first data and the second data (24, step S3), characterised in that - if it is recognised that a first number of sensor devices of the vehicles detects a first expression of the at least one property of the object and a second number of sensor devices of vehicles , which is smaller than the first number, detects a second expression of the at least one property of the object , which expression is different from the first expression, measures are taken in order to improve the sensor devices belonging to the second number in terms of their ability to detect the at least one property . - detecting first data provided by a first of the vehicles by means of a central electronic computing device which is external to the vehicles , wherein the first data characterise at least one property of a stationary object detected by means of the sensor device of the first vehicle and a location (X) of the object on the earth determined by means of the first vehicle (step S1), wherein the sensor device of the first vehicle comprises at least one sensor which is designed as a radar sensor, laser sensor or camera; - detecting second data provided by a second of the vehicles by means of the central electronic computing device external to the vehicles , wherein the second data characterise the at least one property of the same stationary object detected by means of the sensor device of the second vehicle and a location (X) of the object on the earth determined by means of the second vehicle (step S2), wherein the sensor device of the second vehicle comprises at least one sensor which is designed as a radar sensor, laser sensor or camera; and - - checking the sensor devices depending on the first data and the second data (24, step S3), characterised in that - - checking the sensor devices depending on the first data and the second data (24, step S3), characterised in that - if it is recognised that a first number of sensor devices of the vehicles detects a first expression of the at least one property of the object and a second number of sensor devices of vehicles , which is smaller than the first number, detects a second expression of the at least one property of the object , which expression is different from the first expression, measures are taken in order to improve the sensor devices belonging to the second number in terms of their ability to detect the at least one property . <EOS>