BMW Evaporative Emissions System Leak Detection Assembly - Genuine BMW 16137440377

Product Information

BMW Emissions diagram for 840i Gran Coupe, 840i, 840i xDrive, M850i xDrive, M8, & more

An evaporative emissions system leak detection pump (LDP) is a component of the EVAP system that pressurizes the fuel system to check for leaks. By pumping air into the system, it helps the engine control module (ECM) detect even small vapor leaks that could allow fuel vapors to escape into the atmosphere. This process ensures emissions compliance, reduces environmental impact, and maintains fuel system integrity.

• Check Engine Light (CEL) illumination, often with EVAP-related diagnostic trouble codes.
• Strong fuel odors, caused by undetected vapor leaks.
• Failed emissions test, due to the system’s inability to properly monitor for leaks.

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