Generally
Special gasket between the fuel sensor and fuel tank, which can withstand constant fuel contact.
140 kr
Special gasket between the fuel sensor and fuel tank, which can withstand constant fuel contact.
There are small gaskets under the screw heads, check that they are intact otherwise it is easy for fuel to leak there. If they are bad or missing, order new ones. Don't forget that the tank must be properly grounded for the tank sensor to work.