My fuel gauge on the dash isn't working properly. on 2005 Nissan Altima

When I fill up with gas, the gauge only registers half full, but the tank is full. The dte shows 310 miles, but the gauge reads about half a tank left.
This problem was intermittent, but with the last month it has gotten to be a regular weekly issue.

Asked by for the 2005 Nissan Altima
3 answers 2 comments
possibly the sending unit is starting to fail
Poss. sending unit defective.
fuel tank sending unit is going bad and needs to be repl most likely
For the other answers - Come on guys - This is a fix-it question - not do the Nissan $600.00 replace the whole ___fuel pump and sender unit - a fuel sender unit is only an open wire resistor with a wiper on it - It has to be the wiper is not making contact - but someone out there has to be able to tell me how to fix it and not make Nissan another small fortune. This is like a Ford - Take apart 3 other things to get at what you need to fix - Nissan wants you replace parts that don't need to be touched!