When doing replacement or upgrading on 1979 – 1987 Mazda B2000, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight1979 – 1981 H5006
High Beam Headlight1979 – 1981 H5001
High Beam and Low Beam Headlight1982 – 1984, 1986 – 1987 H6054
Back Up Light1979 – 1984, 1986 – 1987 1156
Brake1979 – 1984, 1986 – 1987 1157
Front Side Marker1979 – 1981 67
1982 – 1984 89
Front Turn Signal1986 – 1987 1156
1979 – 1984 1157
License Plate1979 – 1984 89
Parking Light1979 – 1984 1157
1986 – 1987 67
Rear Side Marker1979 – 1984 1157
Rear Turn Signal1986 – 1987 1156
1979 – 1984 1157
Tail Light1979 – 1984, 1986 – 1987 1157
Courtesy1986 – 1987 DE3175