how to fix P0302 misfire code in BMW X5 G05 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before working on components.

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connector for cylinder 2.
3. Remove the ignition coil using a socket set (usually a 10mm socket).
4. Extract the spark plug using a spark plug socket.
5. Inspect the old spark plug for wear; replace it if necessary with a new one (ensure it matches OEM specifications, typically NGK or Bosch).
6. Install the new spark plug by hand to avoid cross-threading, then torque to the manufacturer’s specification (usually around 18 ft-lbs).

3. Replace Ignition Coil

1. If the ignition coil appears faulty, install a new ignition coil for cylinder 2.
2. Reconnect the ignition coil to the connector.
3. Reinstall the engine cover if it was removed.

4. Check Fuel Injector

1. If the spark plug and ignition coil are in good condition, test or replace the fuel injector for cylinder 2.
2. Disconnect the fuel injector connector.
3. Remove the fuel rail if necessary to access the injector.
4. Replace the injector using a new one that meets OEM specifications, ensuring all O-rings are lubricated and in good condition.
5. Reconnect the injector and fuel rail.

5. Reassemble and Test

1. Reconnect the negative battery terminal.
2. Start the engine and check for smooth operation.
3. Clear the trouble codes using the OBD-II scanner.