Water-separating fuel filter, comprising: - an outer housing having a cover and a bowl, the housing defining an inner volume and having an inlet for unfiltered fuel and an outlet for filtered fuel, preferably both arranged at distance from a bottom of the housing; - a filtering element (6; 6') arranged in an upper compartment of the inner volume, the filtering element having an upper flange, a lower flange, an annular filtering medium extending around a longitudinal axis between the upper flange and the lower flange, the filtering medium having an inner face which defines an inner space, the filtering element (6; 6') defining an upstream area communicating with the unfiltered fuel inlet and a downstream area communicating with the filtered fuel outlet; - an assembly with conductive connection comprising an upper end, closer to the upper flange than to the lower flange, and a lower end having a water level sensor and positioned at the same level as or lower than the lower flange; - a lower compartment of internal volume, in which the separated water can collect to reach the sensor; - a connection interface of electrically conductive material provided with two separated terminals (26a, 26b) adapted to be detachably connected to two separated contacts (C1, C2) of the cover, the sensor comprising a first electric pole connecting with one of the two terminals and a second electric pole connecting with the other of the two terminals, to provide a detection signal representative of the presence of water between the first electric pole and the second electric pole, the connection interface being part of the upper end of the assembly with conductive connection and enabling the transfer of the detection signal from the sensor to the cover when the cover is in an assembled state of closing the housing; characterized in that it comprises removable attachment means (V3, V4) so that the cover is detachable from the bowl and selective extraction of the filtering element is enabled, such that the filtering element is replaceable, the filtering element (6; 6') comprising the conductive connection assembly with the connection interface which extends in the downstream area, and in that the filtering element (6; 6') is adapted to separate out the water in the inner space which communicates, at the upper flange of the filtering element, with the filtered fuel outlet, and at the lower flange with the lower compartment, said assembly being positioned on the side of the water separation, extending into the inner space, to allow the separated and accumulated water to reach the sensor, i.e. in the downstream zone; the lower flange sealingly separating the upstream area from the lower compartment and having at least one water drainage opening providing communication between the inner space and the lower compartment. - an outer housing having a cover and a bowl, the housing defining an inner volume and having an inlet for unfiltered fuel and an outlet for filtered fuel, preferably both arranged at distance from a bottom of the housing; - a filtering element (6; 6') arranged in an upper compartment of the inner volume, the filtering element having an upper flange, a lower flange, an annular filtering medium extending around a longitudinal axis between the upper flange and the lower flange, the filtering medium having an inner face which defines an inner space, the filtering element (6; 6') defining an upstream area communicating with the unfiltered fuel inlet and a downstream area communicating with the filtered fuel outlet; - an assembly with conductive connection comprising an upper end, closer to the upper flange than to the lower flange, and a lower end having a water level sensor and positioned at the same level as or lower than the lower flange; - a lower compartment of internal volume, in which the separated water can collect to reach the sensor; - a connection interface of electrically conductive material provided with two separated terminals (26a, 26b) adapted to be detachably connected to two separated contacts (C1, C2) of the cover, the sensor comprising a first electric pole connecting with one of the two terminals and a second electric pole connecting with the other of the two terminals, to provide a detection signal representative of the presence of water between the first electric pole and the second electric pole, the connection interface being part of the upper end of the assembly with conductive connection and enabling the transfer of the detection signal from the sensor to the cover when the cover is in an assembled state of closing the housing; characterized in that it comprises removable attachment means (V3, V4) so that the cover is detachable from the bowl and selective extraction of the filtering element is enabled, such that the filtering element is replaceable, the filtering element (6; 6') comprising the conductive connection assembly with the connection interface which extends in the downstream area, and in that the filtering element (6; 6') is adapted to separate out the water in the inner space which communicates, at the upper flange of the filtering element, with the filtered fuel outlet, and at the lower flange with the lower compartment, said assembly being positioned on the side of the water separation, extending into the inner space, to allow the separated and accumulated water to reach the sensor, i.e. in the downstream zone; the lower flange sealingly separating the upstream area from the lower compartment and having at least one water drainage opening providing communication between the inner space and the lower compartment.