The Volkswagen 412 uses 1895 bulb size for both front and rear side marker applications. The replacement chart covers 1973 to 1974 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1895 bulb is the sole bulb type specified for the Volkswagen 412 across all listed side marker positions and model years.
The 1895 follows the ANSI standard recognized in both the United States and Canada, classifying it as a miniature wedge bulb within the T5 form factor.
At 12 volts and 0.9 watts, the 1895 operates at an exceptionally low wattage, consistent with its role as a marker lamp rather than a primary illumination source.
The T5 designation refers to the bulb's tubular envelope, with the numeric suffix indicating a width of five-eighths of an inch.
The wedge base design means the 1895 is held in its socket by the tension of the base itself, with no separate metal bayonet pins or screw threads involved in retention.
The Volkswagen 412 uses the 1895 bulb for both the front and rear side marker positions across the 1973-1974 model years, meaning a single bulb type serves all four side marker sockets on the vehicle.
Because the same bulb number applies to both the front and rear positions, the 1895 units from either location are interchangeable with one another on this vehicle.
The T5 wedge form factor is a widely used miniature bulb category, and physical fitment into a given socket depends on the specific wedge base size, which for the 1895 is a W2x4.6d base type.