Volvo 245 Headlight Bulb Size

Additional Notes

• The Volvo 245 (1986-1989) uses the 9004 bulb for both high and low beam headlights. The 9004 is a dual-filament halogen bulb with a P29t base, rated at 12V with 65W on high beam and 45W on low beam, conforming to ANSI standards for the US and Canadian markets. Its dual-filament design means a single bulb serves both beam functions within one housing.
• From 1975 through 1985, the Volvo 245 used sealed beam units exclusively for its headlights. Sealed beam units are self-contained glass assemblies in which the filament, reflector, and lens are fused together as one piece, making the entire unit the replaceable component rather than an internal bulb.
• The H6024 is a 7-inch round sealed beam unit operating at 12V, used on the 245 for both high and low beam positions during the 1975-1977 model years. The shared fitment across both beam positions in those years reflects the single-unit design of round sealed beams, which housed both filaments internally.
• The H5001 and H5006 are 4-inch square and 5.75-inch round sealed beam units, respectively, both rated at 12V. The Volvo 245 used the H5001 for high beam and the H5006 for low beam during the 1978-1980 model years, meaning the two beam positions required physically distinct sealed beam units of different shapes and sizes.
• The 4x6-inch rectangular sealed beam format appears across multiple ANSI designations used on the 245 between 1981 and 1985. The H4651, H4652, and H4656 all share this rectangular form factor, though they are distinct part numbers with different filament and output configurations assigned to specific beam positions and model years.
• The H4652 is defined as a variant of the H4651, both being 4x6-inch rectangular sealed beam units rated at 12V. On the 245, the H4651 covered the high beam position for 1981-1985, while the H4652 appeared in the low beam position for 1981 and 1985, indicating that the two designations are not interchangeable despite their physical similarity.
• The H4656 is a 4x6-inch rectangular sealed beam unit used in the low beam position on the 245 for 1982-1984. During those same years, the high beam position used the H4651, confirming that the two rectangular sealed beam variants served distinct optical roles and were not substitutable for one another.
• All bulb and sealed beam types listed across the full 1975-1989 production span of the Volvo 245 conform to ANSI standards applicable to the US and Canadian markets and operate on a 12V electrical system.