Genuine OEM Toyota Engine Breather Housing Gasket, part number 1227315010. This gasket is used to seal the engine breather housing, also known as the oil separator. Its function is to prevent oil from leaking out of the crankcase and to ensure that the crankcase ventilation system operates effectively, removing harmful vapors. The gasket is made from heat-resistant material to withstand engine operating conditions. Genuine OEM gaskets are essential for maintaining a proper seal, preventing leaks, and ensuring the longevity of engine components.