Volvo 265 headlight bulbs utilize H4651 and H5001 sizes for high beam operation, while low beam applications require H4656, H4652, or H5006 bulb sizes. The replacement chart covers 1976 through 1981 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 Volvo 265 used sealed beam headlight units across all listed model years (1976-1981), meaning the entire lens-reflector-filament assembly is replaced as one unit rather than swapping an individual bulb.
All sealed beam types fitted to the Volvo 265 operate on 12V and conform to ANSI standards recognized in both the United States and Canada.
The H4651 is a 4x6-inch rectangular sealed beam unit and serves as the high beam headlight for the 1978-1981 model years.
The H5001 is a 4-inch square sealed beam unit and was used exclusively for high beam duty on the 1976-1977 model years, representing a distinct physical format from the rectangular units used in later years.
The low beam headlight for the 1976-1977 Volvo 265 used the H5006, a 5.75-inch round sealed beam unit, which is physically incompatible with the rectangular H4656 and H4652 units used in subsequent years.
The H4656 rectangular sealed beam unit fills the low beam position for the 1978-1979 and 1981 model years, while the 1980 model year specifies the H4652, a variant of the H4651 in the same 4x6-inch rectangular format.
Because the H4652 is a variant of the H4651 rather than an identical unit, substituting one for the other without confirming compatibility is not advisable, despite their shared physical format.
The shift from round and square sealed beam formats (H5001, H5006) in 1976-1977 to rectangular formats (H4651, H4652, H4656) in 1978-1981 reflects a change in headlight housing geometry that makes units from these two periods physically non-interchangeable.