This turbocharger compresses intake air to increase the density of the charge entering the engine cylinders, raising power output and combustion efficiency. It is mounted on the engine exhaust manifold and is driven by exhaust gas flow; the compressor wheel on the opposite shaft forces pressurized air into the intake system. A worn turbocharger typically produces a loss of engine power, increased exhaust smoke, and audible whine or whistle from the bearing assembly. As an original-manufacturer component, the housing and wheel geometry match the engine's air-flow requirements, preserving the boost curve and oil-seal clearances that the engine management system expects. On replacement, ensure the oil supply line is clean and the drain line is unobstructed; pre-lubricate the bearing journal before first start.