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

Solution

1. Preparation

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

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, spark plug gap tool.
• Remove the engine cover if necessary.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil by unscrewing it and pulling it straight out.
• Unscrew the spark plug using the spark plug socket.
• Inspect the old spark plug for wear or fouling, and ensure the new spark plug is gapped correctly (typically 0.028-0.032 inches for BMW).
• Install the new spark plug and torque it to the manufacturer's specification (usually 18-22 Nm).
• Reinstall the ignition coil and connect the connector.

3. Replace Ignition Coil (if needed)

• If the ignition coil is found to be faulty during inspection, replace it.
• Tools Required: Socket set, torque wrench.
• Remove the faulty ignition coil as described in the previous step.
• Install the new ignition coil, ensuring it clicks into place, and reconnect the connector.

4. Check Fuel Injector (if needed)

• If the injector is suspected to be faulty, it should be tested or replaced.
• Tools Required: Fuel injector puller (if needed).
• Disconnect the fuel line and electrical connector from the injector.
• Remove the injector from the fuel rail.
• Install the new injector and reconnect the fuel line and electrical connector.