fits e.g. BMW 3 (E90) (please check exact vehicle application) Impulse Sensor Corresponds to the original part in colour: Black HELLA camshaft sensor works with the crankshaft sensor to identify the crankshaft’s exact position, enabling precise ignition timing and engine control. Measures speed and position of the camshaft using the Hall effect, providing critical input to regulate fuel injection and engine operation. Built to OEM standards with ideal measuring precision across wide temperature ranges for reliable performance in all conditions. HELLA sensors are designed for long life and consistent signal quality.