how to fix P0302 misfire code in BMW X3 G01 (2018-2024)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to ensure safety.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench
• Steps:
  1. Remove the engine cover if necessary.
  2. Disconnect the ignition coil connector from cylinder 2.
  3. Remove the ignition coil from cylinder 2.
  4. Use a spark plug socket to remove the old spark plug.
  5. Inspect the spark plug gap and replace it with a new spark plug, ensuring proper torque (15 ft-lbs).
  6. Reinstall the ignition coil and connect the connector.

3. Replace Ignition Coil

• Tools Required: Ratchet, socket set
• Steps:
  1. If the ignition coil was not replaced during the spark plug change, remove it as detailed above.
  2. Install the new ignition coil on cylinder 2, ensuring it is seated properly.
  3. Reconnect the ignition coil connector.

4. Inspect/Replace Fuel Injector

• Tools Required: Fuel injector puller (if necessary), ratchet, small sockets
• Steps:
  1. Remove the fuel rail if needed to access the injector.
  2. Disconnect the electrical connector from the fuel injector for cylinder 2.
  3. Remove the fuel line (use a rag to catch fuel spills), and then remove the injector.
  4. Install a new fuel injector, ensuring it is seated correctly and reattach the fuel line.
  5. Reconnect the electrical connector.

5. Reassemble and Final Checks

• Reinstall any engine components removed during the process.
• Reconnect the negative battery terminal.
• Start the engine and check for smooth operation.