how to fix P0301 misfire code on BMW X5 F15 (2014-2019)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Locate the cylinder 1 spark plug (consult the vehicle manual for exact location).
• Using a spark plug socket, remove the old spark plug.
• Inspect the spark plug for signs of fouling or wear.
• Apply anti-seize lubricant to the threads of the new spark plug.
• Install the new spark plug and torque it to the manufacturer’s specification (typically 25-30 Nm).

3. Replace Ignition Coil

• Remove the ignition coil by unscrewing the securing bolts or clips.
• Disconnect the electrical connector from the ignition coil.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the electrical connector and secure the ignition coil with bolts.

4. Clean or Replace Fuel Injector

• Disconnect the fuel injector electrical connector and remove the securing clips.
• Carefully pull out the fuel injector from the rail.
• If cleaning, use a fuel injector cleaner spray and a soft brush to remove any deposits.
• If replacing, install a new fuel injector with new O-rings and reassemble in reverse order.

5. Reassemble and Test

• Reconnect any vacuum hoses or wiring that were disconnected.
• Reconnect the battery terminal.
• Start the engine and allow it to idle to check for any abnormal noises or leaks.