Volkswagen 411 high beam headlight bulbs measure H5001 in size, while low beam headlight bulbs measure H5006 in size. The replacement chart covers 1971 to 1973 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volkswagen 411 uses sealed beam headlight units across all listed model years, 1971-1973, for both high and low beam positions.
The H5001 sealed beam unit is specified for the high beam position. It conforms to ANSI standards applicable in the United States and Canada, operates on 12V, and is constructed as a 4-inch square unit in which the lens, reflector, and filament are fused into a single assembly.
The H5006 sealed beam unit is specified for the low beam position. It also conforms to ANSI standards for the US and Canadian markets, operates on 12V, and takes the form of a 5.75-inch round assembly.
Because both the H5001 and H5006 are sealed beam units, neither contains a replaceable bulb. When a filament fails, the entire headlight assembly requires replacement rather than a bulb swap.
The H5001 and H5006 units are not interchangeable with each other. The high beam position requires the 4-inch square H5001, while the low beam position requires the 5.75-inch round H5006, and the differing shapes physically prevent cross-fitment.
Both sealed beam types carry ANSI designations, meaning their output, voltage, and physical form factors are governed by a standardized specification rather than a proprietary one, which allows equivalent units from different manufacturers to serve as direct replacements provided the ANSI code matches.