When doing replacement or upgrading on 1971 – 1974 Volkswagen 411 412, the bulb size guide is necessary for you to take the reference.

1971 – 1973 Volkswagen 411 Bulb Size Guide
Low Beam Headlight	1971 – 1973	H5006
High Beam Headlight	1971 – 1973	H5001
Brake	1971 – 1973	1157
Front Side Marker	1971 – 1973	97
Front Turn Signal	1971 – 1973	1157
License Plate	1971 – 1973	97
Parking Light	1971 – 1973	1157
Rear Side Marker	1971 – 1973	97
Rear Turn Signal	1971 – 1973	1156
Tail Light	1971 – 1973	1157

1973 – 1974 Volkswagen 412 Bulb Size Guide
High Beam and Low Beam Headlight	1973 – 1974	6014
Back Up Light	1973 – 1974	1156
Brake	1973 – 1974	1156
Front Side Marker	1973 – 1974	1895
Front Turn Signal	1973 – 1974	1157
License Plate	1973 – 1974	89
Parking Light	1973 – 1974	1157
Rear Side Marker	1973 – 1974	1895
Rear Turn Signal	1973 – 1974	1156
Tail Light	1973 – 1974	97