how can I fix a fuel gauge that doesn't work in my BMW X5 F15 (2014-2019)

Solution

1. Preparation

• Tools Required: Safety gloves, safety goggles, OBD-II scanner, multimeter, socket set.
• Disconnect the vehicle's battery to ensure safety while working on electrical components.

2. Access the Fuel Sender Unit

• Remove the rear seat cushion or access panel (depending on your model) to gain access to the fuel pump assembly.
• Disconnect the electrical connector from the fuel sender unit.

3. Test and Replace the Fuel Sender Unit

• Using a multimeter, measure the resistance across the fuel sender terminals while moving the float arm up and down.
  • Resistance should vary smoothly; if it's stuck or shows no change, replace the sender unit.
• If replacement is necessary, proceed to remove the fuel pump assembly:
  • Unscrew the retaining ring using a specialized tool or a flathead screwdriver.
  • Carefully lift the assembly out of the tank, taking care not to damage the fuel lines.
• Install the new fuel sender unit into the assembly:
  • Align the float arm properly.
  • Secure the retaining ring and reconnect the electrical connector.

4. Reassemble and Reconnect

• Reinstall the access panel or rear seat cushion.
• Reconnect the vehicle’s battery.
• Clear any error codes using the OBD-II scanner.