A sensor, suitable for being secured to a wheel bearing of a motor vehicle and serving to measure the rotational speed of the wheel, has a securing ring, a sensor block, at least one electrical line, at least one connector and at least one retaining bridge. The sensor block is electrically connected to the connector by means of the electrical line, and is connected to the securing ring at least by means of a plastic extrusion coating. A retaining bridge is integrally formed on the plastic extrusion coating and carries the connector until the sensor is installed at the location of its final intended position.