Abstract: The invention relates to a lockable sensor for insertion into the bore (1) of a housing (2). having a sensor body (3) that has a flexible lockable arm (4, 9) arranged on the sensor body (3), and having an encoding element (5), wherein the encoding element (5) is arranged on the lockable arm (4, 9). The invention also relates to a sensor arrangement. Furthermore, the invention relates to a method for manufacturing the sensor through injection molding, wherein the free spaces (6) for the lockable arms (4, 9) are formed by projections (24, 25) of one of the halves (22, 23) of the injection mold. The sensor has the advantage that encoding and locking are integrated into one element.