An inboard type sensor for a vehicle anti-skid system is mounted adjacent a wheel assembly and disposed within an annular bored housing. The housing has situated therein a split tubular springlike sleeve which is adapted to exert a radially inward compressive force upon the sensor thus preventing the sensor from undesirable axial or rotational movement after the sensor is properly positioned. The sleeve is locked within the bushing to prevent its axial or rotational movement relative to the housing.
