how to fix the P0301 code in my BMW X3 G01 (2018-2024)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery (negative terminal) to ensure safety before working on electrical components.
• Allow the engine to cool if it was running recently.

2. Remove Ignition Coil and Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, ratchet.
• Remove the engine cover if necessary.
• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the ignition coil by unscrewing the retaining bolt and gently pulling it out.
• Use a spark plug socket to remove the spark plug from cylinder 1. Inspect for wear or damage, and replace if necessary.

3. Inspect and Replace Components

• If the spark plug is fouled or damaged, replace it with the manufacturer-recommended part.
• Test the ignition coil by measuring its resistance with a multimeter. Replace if it is out of specification.
• Check the fuel injector for cylinder 1. If it is malfunctioning, remove and replace it.

4. Reinstall Components

• Reinstall the spark plug into cylinder 1 and torque it to the manufacturer’s specification (typically around 18 ft-lbs).
• Reinstall the ignition coil and secure it with the retaining bolt. Reconnect the electrical connector.
• Replace any removed engine covers.

5. Final Steps

• Reconnect the battery.
• Clear the error codes using an OBD-II scanner.
• Start the engine and allow it to idle for a few minutes to ensure smooth operation.