New, genuine Mazda, cam cover gasket, Mazda MX5 & Eunos Roadster 1.8 mk2.5, 2001-2005. 1993-2001.
Is there oil down #4 spark plug hole? Oily stains down the sides of the cylinder head? If so, this is the usual culprit.
BP6D10235A. NM00697.