how to fix P0302 misfire code on BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Remove the ignition coil from cylinder 2:
  1. Unscrew the bolts securing the coil using a socket set.
  2. Gently pull the coil out of the spark plug.
• Remove the spark plug:
  1. Use a spark plug socket and ratchet to unscrew the spark plug.
  2. Inspect the spark plug for wear, carbon buildup, or damage.
• Install a new spark plug:
  1. Apply anti-seize compound to the threads (if recommended).
  2. Torque the spark plug to 23 Nm (17 lb-ft).

3. Replace Ignition Coil

• If the ignition coil was found faulty:
  1. Install the new ignition coil onto the spark plug and press down until it clicks into place.
  2. Secure it with the bolts removed earlier.

4. Check Fuel Injector

• If the fuel injector is faulty:
  1. Disconnect the electrical connector from the injector.
  2. Remove the fuel rail (if necessary) to access the injector.
  3. Replace with a new injector and reconnect the fuel rail.
  4. Reconnect the electrical connector.

5. Reassemble and Reconnect

• Reconnect any components that were removed for access.
• Reconnect the negative battery terminal.