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 Headlight 1979 – 1985 6014
1993 – 1995 9003
1986 – 1991 H6054
Front Fog Light 1988 – 1991, 1993 – 1995 H3-55W
Back Up Light 1979 – 1991, 1993 – 1995 1156
Brake 1979 – 1991, 1993 – 1995 1157
Dome Light 1986 – 1991, 1993 – 1995 194
1979 – 1985 DE3175
Front Side Marker 1980 – 1991, 1993 – 1995 194
1979 89
Front Turn Signal 1979 – 1991 1157
1993 – 1995 3497
License Plate 1988 – 1991 168
1993 – 1995 194
1979 – 1987 89
Parking Light 1979 – 1991 1157
1993 – 1995 194
Rear Side Marker 1980 – 1991, 1993 – 1995 194
1979 89
Rear Turn Signal 1980 – 1991, 1993 – 1995 1156
1979 1157
Tail Light 1979 – 1991, 1993 – 1995 1157
Center High Mount Stop Light 1988 – 1991 1156
1993 – 1995 921
Glove Box 1993 – 1995 194
Map Light 1988 – 1991 168
1993 – 1995 194
Trunk 1986 – 1991, 1993 – 1995 DE3175