The BMW 328i Camshaft Position Sensor helps keep engine timing in order. It sends camshaft position data to the engine control module so fuel injection and ignition occur at the right moment. So the fuel injection and ignition vary in just the right order to get your car running. With the help of the Camshaft Position Sensor, the ECM controls sequential injectors according to the four-stroke cycle to avoid misfire, which may stall the engine during an exciting drive. To ensure the pistons and valves remain coordinated with the crank sensor, every BMW 328i model relies on this little electronic eye mounted either above the camshaft, behind the cylinder head, or near the engine block. In earlier versions of the BMW 328i, the Camshaft Position Sensor was installed at the back of the head, but people indicate that later models had it placed nearer the front for quicker signals; yet the core Hall-effect design remained the same overall. The Camshaft Position Sensor works alongside the crank sensor to deliver the engine RPM data the dashboard requires, making it one of the two highly critical sensors in any BMW 328i powerplant. The Camshaft Position Sensor is essential for optimal performance.
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