This crankcase ventilation pipe is compatible with model 11157522931 and is an automotive accessory. For use with the E65, E66, E60, E61, X5, E70, E90, and E91. It is compatible with the N52 engine and serves the engine's crankcase ventilation system. It helps to drain oil and gas from the crankcase and maintain stable pressure. Align the pipe with the corresponding port on the ventilation system to oil and gas leaks.