how to fix a stuck fuel gauge in my BMW 3 Series F30/F31 (2012-2019)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to avoid any electrical short circuits.
• Ensure the vehicle is on a flat surface and is securely lifted if needed.

2. Remove Fuel Pump Access Panel

• Locate the fuel pump access panel under the rear seat or trunk (depending on the model).
• Use a socket set to remove any screws or fasteners holding the access panel.
• Carefully lift the panel to expose the fuel pump and sending unit assembly.

3. Inspect and Replace Fuel Level Sensor

• Disconnect the electrical connector from the fuel level sensor.
• Remove the fuel pump assembly from the tank by unscrewing any retaining clips or bolts.
• Carefully pull out the fuel level sensor from the assembly.
• Inspect the sensor for any damage; if it is faulty, replace it with a new one.
• Reinstall the new fuel level sensor into the fuel pump assembly.

4. Reassemble Components

• Reinsert the fuel pump assembly back into the tank and secure it with the retaining clips or bolts.
• Reconnect the electrical connector to the fuel level sensor.
• Replace the fuel pump access panel and secure it with screws.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the vehicle and observe the fuel gauge to ensure it functions properly.
• If necessary, fill the tank and check for accurate readings.