Genuine OEM Volkswagen Exhaust Gas Turbocharger, part number 03N145713J. This turbocharger utilizes exhaust gases to spin a turbine, which in turn drives a compressor to force more air into the engine, increasing power output. It is a key component in the exhaust and intake system. The turbocharger is a complex assembly requiring precise manufacturing tolerances for optimal performance and longevity. Genuine OEM turbochargers ensure correct material specifications and balancing for reliable operation.