BMW E46/X5 320-530 Crankshaft Position Sensor 12147518628 Precise Signal

If your BMW E46 or X5 (320-530) has starting difficulty, rough idle, weak acceleration, or sudden stalling, the crankshaft position sensor may be aging or damaged. This sensor monitors crankshaft speed and position and sends signals to the ECU to control ignition and injection; failure leads to engine failure. OEM number 12147518628 (12 147 518628) fits BMW E46 series (e.g., 320i, 325i, 330i) and X5 (E53) 3.0-4.4L. Installation requires correct clearance between sensor and flywheel ring gear (usually 0.5-1.5 mm) and bolt securing to prevent signal interference.