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 Headlight 1978 – 1990 H6054
Back Up Light 1978 – 1990 1156
Brake 1978 – 1990 1157
Dome Light 1978 – 1984, 1989 – 1990 578
Front Side Marker 1978 – 1979 1157
1980 – 1990 168
Front Turn Signal 1978 – 1990 1157
License Plate 1978 – 1990 168
Parking Light 1978 – 1990 1157
Rear Side Marker 1978 – 1983, 1985 – 1990 168
1984 194
Rear Turn Signal 1978 – 1980 1156
1981 – 1990 1157
Tail Light 1978 – 1984 1157
Center High Mount Stop Light 1985 1157
1986 – 1990 912
Courtesy 1979 – 1981 161
1985 168
1984 212-2
1978, 1982 562
1990 912
Engine Compartment Light 1984 1003
1978 912
Glove Box 1980 – 1986 1891
1978 – 1979 1893
Inner Tail Light 1985 – 1990 194
Map Light 1985 168
1978 – 1983 562
1990 578
1984 912
Outer Tail Light 1985 – 1990 1157
Radio Display 1981 – 1983 158
1978 – 1979 194
1980, 1984 73
1985 – 1990 74
Trunk 1984 1003
1979, 1982 211-2
1983 212-2
1978, 1985, 1988 – 1990 912