When doing replacement or upgrading on 1978 – 1990 Dodge Omni, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

High Beam and Low Beam Headlight1978 – 1990 H6054
Back Up Light1978 – 1990 1156
Brake1978 – 1990 1157
Dome Light1978 – 1984, 1989 – 1990 578
Front Side Marker1978 – 1979 1157
1980 – 1990 168
Front Turn Signal1978 – 1990 1157
License Plate1978 – 1990 168
Parking Light1978 – 1990 1157
Rear Side Marker1978 – 1983, 1985 – 1990 168
1984 194
Rear Turn Signal1978 – 1980 1156
1981 – 1990 1157
Tail Light1978 – 1984 1157
Center High Mount Stop Light1985 1157
1986 – 1990 912
Courtesy1979 – 1981 161
1985 168
1984 212-2
1978, 1982 562
1990 912
Engine Compartment Light1984 1003
1978 912
Glove Box1980 – 1986 1891
1978 – 1979 1893
Inner Tail Light1985 – 1990 194
Map Light1985 168
1978 – 1983 562
1990 578
1984 912
Outer Tail Light1985 – 1990 1157
Radio Display1981 – 1983 158
1978 – 1979 194
1980, 1984 73
1985 – 1990 74
Trunk1984 1003
1979, 1982 211-2
1983 212-2
1978, 1985, 1988 – 1990 912