how to fix the fuel pump issue in my BMW 3 Series F30/F31 (2012-2019)?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent any electrical shorts.
• Allow the vehicle to cool down if it has been recently driven.

2. Remove Fuel Pump Access Panel

• Locate the fuel pump access panel underneath the rear seat or trunk area.
• Remove any bolts or clips securing the access panel using a socket set.
• Carefully lift the access panel to expose the fuel pump assembly.

3. Disconnect Fuel Lines and Electrical Connectors

• Relieve fuel system pressure by removing the fuel pump relay and starting the engine until it stalls.
• Disconnect the fuel lines from the fuel pump assembly using a fuel line removal tool.
• Unplug the electrical connector from the fuel pump by pressing the release tab and pulling it away.

4. Remove and Replace the Fuel Pump

• Unscrew the retaining ring or bolts securing the fuel pump assembly using a socket set.
• Gently lift the fuel pump assembly out of the fuel tank.
• Install the new fuel pump into the assembly, ensuring that it is seated correctly.
• Reinstall the retaining ring or screws, tightening them to the manufacturer's specified torque.

5. Reconnect Fuel Lines and Electrical Connectors

• Reattach the fuel lines, ensuring they click into place securely.
• Plug the electrical connector back into the fuel pump assembly.

6. Replace Access Panel and Battery

• Reinstall the fuel pump access panel and secure it with bolts or clips.
• Reconnect the battery terminals.

7. Test the Installation

• Turn the ignition to the ON position without starting the engine to prime the fuel system.
• Check for leaks around the fuel lines and pump assembly.
• Start the engine and verify proper operation.