Toyota Sequoia Stepwell Bulb Size

Additional Notes

• The Toyota Sequoia stepwell position uses three distinct bulb types across its model years: the 12961, the 74, and the 194. All three operate at 12 volts and share a miniature wedge construction, though they differ in size classification and wattage.
• The bulb 74 is the most frequently specified type across the Toyota Sequoia stepwell position, covering 2002-2020 with the exception of 2004, 2005, and 2007. It is an ANSI-standard T5 miniature wedge bulb rated at 1.4 watts.
• The 194 is a T10 miniature wedge bulb rated at 3.78 watts and is specified for the 2001, 2004, 2005, and 2007 model years. Although the 194 and the 12961 share the T10 form factor, they are not the same part and should not be treated as interchangeable without confirming base and wattage compatibility.
• The 12961 is a Philips-branded part rather than an ANSI-coded bulb. It is a T10 miniature wedge type with a W2.1x9.5d base, rated at 5 watts, and is specified for the 2021-2022 model years.
• The T5 classification of the 74 bulb indicates a smaller tube width than the T10 used by both the 194 and the 12961. This size difference means the 74 is physically incompatible with sockets designed for T10 bulbs, and vice versa.
• The W2.1x9.5d base designation on the 12961 describes a wedge base with a 2.1 mm wire width and a 9.5 mm pin spread. This is the standard wedge base shared across many T10 miniature bulbs, including the 194.
• The wattage difference between the three bulb types is notable: the 74 draws 1.4 watts, the 194 draws 3.78 watts, and the 12961 draws 5 watts. Substituting a higher-wattage bulb into a socket rated for a lower-wattage type risks exceeding the thermal and electrical tolerances of that circuit.
• The 2007 Toyota Sequoia stepwell specification calls for the 194, while the surrounding model years 2006 and 2008 both call for the 74. This makes the 2007 model year a fitment exception that warrants attention when sourcing a replacement bulb.