Toyota 4Runner Instrument Panel Bulb Size

Additional Notes

• The Toyota 4Runner instrument panel draws from three bulb sizes across its 1984-2002 model range: the 194, 158, and 74, all of which conform to ANSI standards recognized in the United States and Canada.
• The 194 is the most frequently specified bulb in the Toyota 4Runner instrument panel, appearing across ten model years: 1992-1998 and 2001-2002, with the exception of 1999-2000.
• The 194 is a T10 miniature wedge bulb rated at 12 volts and 3.78 watts, making it the highest-wattage option among the three bulb types listed in these specifications.
• The 158 is also a T10 miniature wedge bulb operating at 12 volts, but it draws 3 watts rather than the 3.78 watts of the 194. Both share the same T10 wedge base form factor.
• Although the 194 and 158 share the T10 wedge base, their wattage ratings differ. Substituting one for the other in the Toyota 4Runner instrument panel may not be appropriate, as each year's specification calls for a distinct bulb.
• The 74 is a T5 miniature wedge bulb rated at 12 volts and 1.4 watts. Its T5 base is physically smaller than the T10 base used by both the 194 and 158, making the 74 incompatible with sockets designed for T10 bulbs.
• The 1999-2000 Toyota 4Runner uses the 158 for its instrument panel, while the immediately surrounding years of 1998 and 2001-2002 use the 194. These years require different bulbs despite sharing the same T10 base type.
• The 74 bulb is specified for the 1984, 1986, 1988-1989, and 1991 model years. Its lower wattage of 1.4 watts and smaller T5 form factor distinguish it from the bulbs used in other years.
• The 1985, 1987, 1990, 1999, and 2000 model years share the 158 specification. These years are non-consecutive, so a single-range expression does not apply across all of them.
• Because the T5 and T10 wedge bases are physically distinct sizes, bulbs specified for T5 sockets cannot be used as direct replacements in T10 sockets, and vice versa, regardless of voltage compatibility.