Toyota 4Runner Headlight Bulb Size

Additional Notes

• The Toyota 4Runner uses the 9005 bulb for the high beam headlight across 2003-2024, making it the most consistently specified bulb type in these specifications. It is a single-filament halogen unit rated at 12V and 65W, built to the ANSI standard for the US and Canadian markets, and fitted with a P20d base.
• The H11 bulb serves as the low beam headlight on the Toyota 4Runner for 2006-2024. It follows the ECE standard used in Europe and worldwide, though it also carries US approval. It is a single-filament halogen bulb with a PGJ19-2 base, rated at 12V and 55W.
• Because the 9005 and H11 are separate single-filament bulbs, the 2006-2024 4Runner requires two distinct bulb types to cover both high and low beam functions, one per circuit.
• The 9003 bulb is a dual-filament halogen unit with a P43t base, rated at 12V with 60W on the high beam filament and 55W on the low beam filament. Its dual-filament design means a single bulb handles both beam functions, which is reflected in the specifications showing the same 9003 size listed for both high and low beam positions on the 1996-2002 4Runner.
• The 9004 bulb, specified for the 1992-1995 4Runner on both high and low beam positions, is also a dual-filament halogen type. It uses a P29t base and is rated at 12V, with 65W on the high beam filament and 45W on the low beam filament.
• The H6054 is a 5x7-inch rectangular sealed beam unit specified for the 1984-1991 4Runner on both beam positions. Unlike the other bulb types in these specifications, the H6054 is not a replaceable bulb within a housing; the entire sealed unit is replaced as one assembly.
• The 9006 bulb appears only on the low beam position for the 2003-2005 4Runner. It is a single-filament halogen bulb with a P22d base, rated at 12V and 55W, and follows the ANSI standard. During those same years, the high beam position uses the 9005, which shares the same wattage rating but carries a different base type, making the two bulbs physically non-interchangeable despite their similar electrical ratings.
• The P20d base of the 9005 and the P22d base of the 9006 are distinct connector types. Although both bulbs are rated at 12V and share a single-filament design, their bases are not compatible with each other's housings, and substituting one for the other is not supported by the specifications.
• The transition from the dual-filament 9003 in 1996-2002 to the separate 9005 and H11 pairing from 2006 onward represents a shift in headlight architecture on the 4Runner, moving from a single-bulb system serving both beams to a dedicated bulb for each beam function.
• The 9003 bulb follows the ANSI standard and carries a P43t base, while the H11 follows the ECE standard with a PGJ19-2 base. These two standards use different base configurations, and bulbs from one standard are not physically interchangeable with sockets designed for the other.