Oil leaks

B] HI! Everybody, I have a question for my 93 mazda mpv 6 cylinders, I can smell something burn after 20 mins drive, and I found out there is oil leaks from the back of the engine at the passenger side, just behind the valves cover, there is a component with a rubber hose link to the intake manifold where the oil leaks and drip on the heat shield for the exhaust pipe, that`s the burning smell came from. And I don`t know what component is that, is anybody knows the name of that parts so I can buy a gasket to fix it. Thanks.