When doing replacement or upgrading on 1979 – 1995 Mazda RX-7, 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 Headlight1979 – 1985 6014
1993 – 1995 9003
1986 – 1991 H6054
Front Fog Light1988 – 1991, 1993 – 1995 H3-55W
Back Up Light1979 – 1991, 1993 – 1995 1156
Brake1979 – 1991, 1993 – 1995 1157
Dome Light1986 – 1991, 1993 – 1995 194
1979 – 1985 DE3175
Front Side Marker1980 – 1991, 1993 – 1995 194
1979 89
Front Turn Signal1979 – 1991 1157
1993 – 1995 3497
License Plate1988 – 1991 168
1993 – 1995 194
1979 – 1987 89
Parking Light1979 – 1991 1157
1993 – 1995 194
Rear Side Marker1980 – 1991, 1993 – 1995 194
1979 89
Rear Turn Signal1980 – 1991, 1993 – 1995 1156
1979 1157
Tail Light1979 – 1991, 1993 – 1995 1157
Center High Mount Stop Light1988 – 1991 1156
1993 – 1995 921
Glove Box1993 – 1995 194
Map Light1988 – 1991 168
1993 – 1995 194
Trunk1986 – 1991, 1993 – 1995 DE3175