BMW 13627525015 Pulse Generator, Crankshaft / Gearbox

On 2.0L engines, the CKP sensor has two connected parts: the connector housing mounted above the starter and the sensor end which is mounted underneath the starter and behind the flywheel. Remove the starter. Disconnect the electrical connector to the CKP housing, then remove the housing bolt. Working through the starter opening, remove the sensor mounting bolt and pull the sensor from the crankcase. Installation is the reverse of removal, making sure that the guide pin on the CKP sensor is inserted in the guiding groove on the crankcase. On 3.0L engine models, the CKP sensor is located below the starter motor. For access, remove the intake manifold. Disconnect the sensor electrical connector, then remove the retaining bolt and the sensor. Note: The retaining bolt is aluminum, and must be replaced. Check the condition of the sealing ring and replace if necessary. Install the sensor and tighten the new retaining bolt to the specified torque. Installation is the reverse of removal.

On 2.0L engines, the CKP sensor has two connected parts: the connector housing mounted above the starter and the sensor end which is mounted underneath the starter and behind the flywheel. Remove the starter. Disconnect the electrical connector to the CKP housing, then remove the housing bolt. Working through the starter opening, remove the sensor mounting bolt and pull the sensor from the crankcase. Installation is the reverse of removal, making sure that the guide pin on the CKP sensor is inserted in the guiding groove on the crankcase. On 3.0L engine models, the CKP sensor is located below the starter motor. For access, remove the intake manifold. Disconnect the sensor electrical connector, then remove the retaining bolt and the sensor. Note: The retaining bolt is aluminum, and must be replaced. Check the condition of the sealing ring and replace if necessary. Install the sensor and tighten the new retaining bolt to the specified torque. Installation is the reverse of removal.

On 2.0L engines, the CKP sensor has two connected parts: the connector housing mounted above the starter and the sensor end which is mounted underneath the starter and behind the flywheel. Remove the starter. Disconnect the electrical connector to the CKP housing, then remove the housing bolt. Working through the starter opening, remove the sensor mounting bolt and pull the sensor from the crankcase. Installation is the reverse of removal, making sure that the guide pin on the CKP sensor is inserted in the guiding groove on the crankcase. On 3.0L engine models, the CKP sensor is located below the starter motor. For access, remove the intake manifold. Disconnect the sensor electrical connector, then remove the retaining bolt and the sensor. Note: The retaining bolt is aluminum, and must be replaced. Check the condition of the sealing ring and replace if necessary. Install the sensor and tighten the new retaining bolt to the specified torque. Installation is the reverse of removal.

The crankshaft position sensor detects crankshaft position and rotation speed. The sensor used on N55 motors can also detect direction of rotation. On N51, N52, and N54 motors this sensor is positioned in the engine block and reads a toothed wheel located on the crankshaft. On N55 motors this sensor is located in the bellhousing and uses a magnetic reluctor wheel mounted on the crankshaft flange. If the ECM does not receive a signal from the crankshaft position sensor during cranking, the engine does not start. If the OBD II system misfire detection protocol detects a catalyst damaging fault due to a malfunctioning in crankshaft position sensor, the malfunction indicator light (MIL) is illuminated. The crankshaft position sensor on N51, N52, and N54 motors is supplied 12 volts from the engine electronics fuses and ground from the ECM. It produces a 5 volt square wave signal to the ECM. N55 engines use a sensor that is supplied with a 5 volt reference signal. The sensor evaluation electronics produce a sine wave signal to the ECM from 4.1 to 5.1 volts. The crankshaft position sensor may also be referred to as engine speed I reference sensor.

The crankshaft position sensor, placed in the bell housing, can be accessed via the starter motor opening. Turn off the ignition before starting. Remove the Starter, and then the sensor mounting fastener, allowing sensor and dust gasket removal. Next, remove the sensor connector. For installation, insert the sensor's guide pin in the crankcase groove, using a new dust gasket. Replace bolts and route wiring as before.

You will need to raise the car and support it in a safe manner.

The crankshaft sensor in the M54 engine is located on the left rear of the engine block, underneath the intake manifold and starter motor.