Toyota 4Runner Side Marker Bulb Size

Additional Notes

• The Toyota 4Runner front side marker uses three distinct bulb types across its model history: the 194, 168, 168NA, and 12961, all of which operate on a 12V electrical system.
• The 194 and 168 are both T10 miniature wedge bulbs sharing the same physical base format, yet they carry different wattage ratings. The 194 draws 3.78W while the 168 draws 4.9W, meaning the two are not direct drop-in replacements despite their physical similarity.
• The 168NA designation used on the 2006-2007 front side marker positions specifies a natural amber glass envelope. This factory-tinted glass produces an amber output without a separate amber lens or colored coating on the bulb.
• The 12961 is a Philips part number rather than an ANSI industry code. It specifies a T10 wedge bulb with a W2.1x9.5d base rated at 12V and 5W, and it serves as the front side marker bulb on the Toyota 4Runner for the 1997-2002 model years.
• The rear side marker on the Toyota 4Runner uses the 7443, a T20 dual-filament wedge bulb rated at 12V with a 21W main filament and a 5W secondary filament. Its T20 housing is physically larger than the T10 bulbs used in the front positions, making cross-position substitution impossible.
• The dual-filament construction of the 7443 means the rear side marker on 2003-2007 and 2010-2013 model years is capable of operating at two brightness levels, a characteristic absent from the single-filament T10 bulbs used elsewhere in the side marker system.
• The front side marker on the 2022-2024 Toyota 4Runner uses the 194, while the rear side marker on the 2023-2024 model years uses the 168. These two positions therefore require different bulbs on those vehicles despite both being side marker functions.
• The 1984-1991 and 1992 model years show variation in the front side marker bulb, with the 194 appearing in 1984-1989 and 1992, and the 168 appearing in 1990-1991. The rear side marker on the 1984-1989 model years also uses the 194.