how to fix the fuel gauge not working on my Volkswagen Tiguan First Generation (2007-2018)?

Solution

1. Preparation

• Gather necessary tools and parts. Ensure the vehicle is parked on a level surface with the parking brake engaged.
• Disconnect the battery to prevent any electrical shorts during the repair.

2. Access Fuel Level Sending Unit

• Tools Required: Socket set, torque wrench, flathead screwdriver.
• Remove the rear seat or access panel to locate the fuel tank access cover.
• Unscrew and remove the access cover to expose the fuel level sending unit.

3. Inspect and Test Sending Unit

• Carefully disconnect the electrical connector from the fuel level sending unit.
• Use a multimeter to measure the resistance of the sending unit while moving the float arm through its full range.
  • Resistance should vary from approximately 0 to 90 ohms (check specific values for your model).
• If the resistance is outside the specified range, replace the fuel level sending unit.

4. Replace Sending Unit (if necessary)

• Parts Required: Fuel level sending unit (specific to model).
• Remove the lock ring securing the sending unit using a flathead screwdriver.
• Carefully lift the sending unit out of the tank and replace it with the new unit.
• Reinstall the lock ring and ensure it is secured properly.

5. Reassemble and Test

• Reconnect the electrical connector to the fuel level sending unit.
• Replace the access cover and secure it with screws.
• Reconnect the battery.
• Start the vehicle and check the fuel gauge for proper operation.