how to fix P0302 misfire code on my BMW X5 F15 (2014-2019)

Solution

1. Preparation

• Gather tools and parts. Ensure the engine is cool before starting work.
• Disconnect the battery to avoid any electrical shorts.

2. Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Remove the engine cover if necessary.
• Locate the ignition coil for cylinder 2.
• Disconnect the electrical connector from the ignition coil.
• Remove the bolt(s) securing the coil and pull the coil out of the cylinder head.
• Install the new ignition coil and tighten to manufacturer's specifications (typically 10-12 Nm).
• Reconnect the electrical connector.

3. Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench
• Using the spark plug socket, remove the spark plug from cylinder 2.
• Inspect the old spark plug for wear or fouling; replace if necessary.
• Install the new spark plug and torque to the manufacturer’s specifications (usually around 25-30 Nm).

4. Inspect/Replace Fuel Injector

• Tools Required: Fuel injector removal tools, safety glasses
• Disconnect the fuel line and electrical connector from the fuel injector for cylinder 2.
• Remove any retaining clips or bolts securing the injector.
• Pull the fuel injector out and inspect for clogs or damage.
• Install the new fuel injector, ensuring it seats properly and reconnect the electrical connector.

5. Reassemble and Test

• Reattach any engine covers removed during the repair.
• Reconnect the battery.
• Start the engine and ensure smooth operation.