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.

In order to service or repair the engine, one way is to remove the DME main relay that is situated in the electronics box located at the right rear of the engine compartment. Care should be taken when identifying relays since their locations can differ. If you connect test equipment that supplies 12 volts on terminal 15(+) of ignition coil or spark plug coil wires are removed for disabling ignition, it may cause damage to ECM. The ignition system wires, multiple wire connectors and equipment leads should only be connected or disconnected with the ignition off. Never disconnect a battery while an engine is running and ensure that you read through precautions before removing battery cables. After turning OFF the ignition switch, it is recommended to wait for at least 1 minute before disconnecting ECM connector because there might be some kind of damage possible on control module if this timing isn't followed strictly. Electrical tests should be conducted by using digital multimeter while quick tests can be made by using LED test light. Aluminum fasteners must not replace steel bolts in order to prevent electrochemical corrosion of aluminum-magnesium alloyed components of an engine. Every time aluminum fasteners come loose, they must be thrown away and instructions regarding torque specifications including angle specification must also be followed during installation of aluminum fasteners. BMW X3 models have digital motor electronics (DME), also called Motronic ECM which controls fuel injection and ignition as one integrated unit on these engines.BMW X3 engines have individually controlled/monitored coils on them and therefore servicing them requires cleanliness so that ignitions coils do not fail.Accordingly, ECM uses different inputs such as coolant temperature; knock detection; engine load; intake air temperature; knock detection in adjusting its timing.Likewise crankshaft sensor detects crankshaft position and speed rotation while camshaft sensors respond to impulse wheels mounted on camshafts' ends for various functionalities such as cylinder recognition, spark timing, sequential fuel injection, VANOS (camshaft timing) and Valvetronic (variable valve) control. Knock sensors can retard ignition spark when knock is detected in the combustion chambers that may damage an engine; they are located at the left side of the cylinder block beneath an intake manifold, both should be replaced if a single fault occurs.

If the ECM does not receive a signal from the crankshaft position sensor during cranking, the engine does not start.

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

The sensor can be accessed through the starter motor opening.

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