my BMW X3 G01 (2018-2024) has a check engine light and codes P0301 and P0302

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety while working on the electrical components.

2. Inspect and Replace Spark Plugs

• Remove the engine cover using a socket set.
• Disconnect the electrical connectors from the ignition coils.
• Unscrew the ignition coils and remove them.
• Remove the spark plugs using a spark plug socket.
• Inspect the spark plugs for wear (look for signs of fouling or damage).
• Replace with new spark plugs according to manufacturer specifications (typically NGK or Bosch).
• Reinstall the spark plugs and ignition coils, ensuring they are torqued to the specified value (usually around 15 Nm).

3. Test and Replace Ignition Coils (if necessary)

• Test the ignition coils from cylinders 1 and 2 using a multimeter to verify resistance.
• If they are faulty, remove the old ignition coils and install new ones.
• Ensure that the new ignition coils are compatible with the BMW X3 G01.

4. Inspect and Replace Fuel Injectors (if necessary)

• If fuel injector operation is suspect, remove the fuel rail and inspect the injectors for clogs or damage.
• Replace any faulty injectors with OEM replacements.
• Reinstall the fuel rail and ensure all connections are secure.

5. Clear Error Codes

• Reconnect the battery.
• Use the OBD-II scanner to clear the error codes after completing repairs.