The present invention relates to a sensor mounting system (1) for mounting onto a vehicle sensor mounting bracket (4) to be attached to a surface (5) of a vehicle, the sensor mounting system (1) comprising a sensing device (2) for mounting onto the vehicle sensor mounting bracket (4), and a cover (3) for covering the sensing device (2). The sensing device (2) is configured for being mounted onto the vehicle sensor mounting bracket by sliding from a sensing device delivery position to a sensing device mounted position, and the cover (3) is configured for pivoting relative to the sensing devicefrom a cover delivery position to a cover locked position. Further, the sensor mounting system (1) is configured such that, when the sensing device is mounted onto the vehicle sensor mounting bracketin the sensing device delivery position with the cover in the cover delivery position, the cover contacts the vehicle sensor mounting bracket such that by pivoting the cover towards the cover locked position, the cover exerts a pressure on the vehicle sensor mounting bracket causing sliding of the sensing device into the sensing device mounted position.