VEHICLE SENSOR ASSEMBLY

A sensor assembly includes a chamber extending downward from a roof panel of a vehicle and a sensor unit mounted to the chamber. The sensor unit is vertically movable between a retracted position in the chamber and an extended position extending above the roof panel. The sensor unit includes a base, an environmental sensor fixedly mounted to the base, a cover positioned above the environmental sensor and fixed relative to the base, a first seal extending around the cover, and a second seal extending around the base. The first seal is watertight with the roof panel when the sensor unit is in the retracted position. The second seal is watertight with the roof panel when the sensor unit is in the extended position.