A flexible fuel sensor for measuring the fuel level in a tank in which the sensor is installed. The flexible fuel sensor comprises a fitting arranged to be mounted to a mated fitting on a fuel tank associated with a hole in the fuel tank, a flexible down member extending from the fitting in a first direction and including a fuel level sensing mechanism, the down member configured to be mounted to extend through the hole into the fuel tank, and a sensor head extending from the fitting in a second direction and including sensor electronics coupled to the fuel level sensing mechanism. The flexible down member may comprise a coil made of steel wire.