Is your 1979-1993 Mustang fuel gauge not working? You might need a new Mustang fuel tank sending unit. Latemodelrestoration.com's fuel tank sending unit's are a reproduction of the O.E.M. unit that will get your fuel gauge reading properly again. These gas tank sending units are offered for EFI and non EFI 2.3L, 3.8L, and 5.0L motors. Order a fuel sending unit lock ring to replace the existing lock ring as these tend to rust out over time. These parts fit 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, and 1993 Mustangs.