why does my BMW 3 Series F30/F31 (2012-2019) use so much gas?

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the battery to prevent any electrical mishaps.

2. Replace Air Filter

• Locate the air filter housing.
• Remove screws or clips securing the housing.
• Take out the old air filter and clean the housing.
• Install a new air filter, ensuring it fits snugly.
• Reattach the housing securely.

3. Clean Mass Airflow Sensor

• Locate the MAF sensor in the air intake.
• Disconnect the electrical connector carefully.
• Remove the MAF sensor from the housing.
• Use MAF cleaner spray to clean the sensor element. Allow it to dry completely.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Inspect and Clean Fuel Injectors

• Remove the engine cover (if applicable) to access fuel injectors.
• Disconnect the fuel line from the injectors using the appropriate tool.
• Remove the injectors from the fuel rail.
• Use a fuel injector cleaner or send them to a professional for ultrasonic cleaning.
• Reinstall the injectors with new O-rings to prevent leaks.

5. Replace Spark Plugs

• Remove the ignition coils by unscrewing them and disconnecting the electrical connectors.
• Extract the old spark plugs using a spark plug socket.
• Check the gap on new spark plugs and adjust if necessary.
• Install new spark plugs and reconnect the ignition coils.