Peugeot fuel gage indicator Phenomenon

This is how a fuel pump looks like. There are several types for different models of make but all performing the same purpose. They are immersed in the fuel tank which is right under the rear passenger seat.





The thin film resistor with the float assy will provide fuel level signal to the meter at the dashboard. This carbon film resistor wears out over time and will give you the "swing" effect thus inaccuracies.

I have not found a replacement part for this as I believed ( I could be wrong ) it comes together with the fuel pump unit.