At the Mazda Skyactiv model rocker cover, no matter on the Mazda 2 1.5 , CX-5 2.0 or 2.5, as long as it is a Skyactiv version, there are one gasket which looks similar like a plug seal, but it isn't a plug seal for this engine, we may call it as oil control valve gasket.
This gasket OEM part number is PE01-10-2D5, actually is also very similar to the Mazda older model LF, L3 and L5 engine which carry OEM part number of L362-10-2D5, but L362-10-2D5 is slightly bigger than the PE01-10-2D5.