Chrysler Imperial Headlight Bulb Size

Additional Notes

• The Chrysler Imperial uses sealed beam headlight units across all listed model years, meaning the entire lens-reflector-filament assembly is replaced as one unit rather than swapping an internal bulb.
• All sealed beam types specified for the Chrysler Imperial conform to ANSI standards applicable in the United States and Canada, and all operate at 12 volts.
• The H5001, a 4-inch square sealed beam unit, is the most frequently recurring high beam specification, covering the 1958-1975 model years. Its paired low beam counterpart is the H5006, a 5.75-inch round sealed beam unit covering the same span.
• The 1990-1993 Imperial uses the H4701 for high beam and the H4703 for low beam. Both are 7-inch round sealed beam units, though the H4701 is designated a variant within that form factor, making the two non-interchangeable despite their shared shape and size.
• The 1981-1983 Imperial uses 4x6-inch rectangular sealed beam units. The high beam position takes the H4651 across all three years, while the low beam position shifts from the H4656 in 1981-1982 to the H4652 in 1983. The H4652 is itself a variant of the H4651, so all three low beam units in this generation share the same rectangular housing class yet carry distinct designations.
• The 1957 Imperial uses the H6024, a standard 7-inch round sealed beam unit, for both high and low beam positions, making it the only model year in the specifications where a single bulb type serves both functions.
• The 1950-1955 Imperial uses the H6006, a 5x7-inch rectangular sealed beam unit, for both high and low beam positions across all six listed years.
• Four distinct physical form factors appear across the full range of specifications: 4-inch square (H5001), 4x6-inch rectangular (H4651, H4652, H4656), 5x7-inch rectangular (H6006), and 7-inch round (H4701, H4703, H6024), with the 5.75-inch round H5006 representing a fifth distinct format used exclusively in the low beam position during the 1958-1975 years.