When doing replacement or upgrading on 1968 – 1994 Volkswagen Transporter, 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 1968 – 1979, 1985 6014
1986 – 1994 9004
Front Fog Light 1986 – 1994 H3-55W
Back Up Light 1968 – 1979, 1985 – 1994 1156
Brake 1985 1156
1968 – 1979, 1986 – 1994 1157
Dome Light 1986 – 1991 578
1985 6411
Front Side Marker 1968 – 1979 1895
1985 – 1991 T4W
Front Turn Signal 1968 – 1979, 1985, 1992 – 1994 1157
1986 – 1991 P21/5W
License Plate 1985 12814
1992 – 1994 194
1968 – 1979 89
1986 – 1991 T4W
Parking Light 1968 – 1979, 1985 – 1994 1157
Rear Side Marker 1985, 1988 – 1990 12929
1968 – 1979 1895
1986 – 1987, 1991 T4W
Rear Turn Signal 1968 – 1979, 1985 – 1994 1156
Tail Light 1968 – 1979, 1986 – 1991 1157
1985 12821
1992 – 1994 P21/5W
Center High Mount Stop Light 1986 – 1994 194
Courtesy 1986 – 1991 6411
Glove Box 1990 12818
1986 – 1989, 1991 DE3175