how to fix P0301 misfire code in BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

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

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 1, which is typically near the front of the engine.
• Use a spark plug socket to carefully remove the spark plug.
• Inspect the old spark plug for wear or damage.
• Install a new spark plug, ensuring it is the correct type for the engine.
• Torque the spark plug to the manufacturer’s specification (usually around 20 Nm).

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Remove the ignition coil using a socket.
• Install the new ignition coil in place, ensuring it locks into position.
• Reconnect the electrical connector securely.

4. Check and Replace Fuel Injector (if necessary)

• Tools Required: Fuel line disconnect tool, socket set
• Relieve fuel system pressure.
• Disconnect the fuel line and electrical connector from the fuel injector.
• Remove the fuel injector from its rail.
• Install the new fuel injector, ensuring proper sealing.
• Reconnect the fuel line and electrical connector.

5. Reassemble and Connect Battery

• Reattach any components or covers removed during the process.
• Reconnect the battery terminals.