Toyota 4Runner Stepwell Bulb Size

Toyota 4Runner stepwell bulb sizes include 168, 194, and DE3175 configurations across different model generations. The replacement chart covers vehicle production years spanning 1995 to 2019.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2010-2019	168
2003-2009	194
2000-2001	DE3175
1995	DE3022

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3022

Other Locations

Additional Notes

The Toyota 4Runner stepwell uses the 168 bulb for model years 2010-2019. This is a T10 miniature wedge bulb rated at 12V and 4.9W, conforming to ANSI standards for the US and Canadian markets.
The 194 bulb is specified for the Toyota 4Runner stepwell across model years 2003-2009. Like the 168, it is a T10 miniature wedge type operating at 12V, though its wattage is lower at 3.78W.
Although the 168 and 194 bulbs share the same T10 wedge form factor, their wattage ratings differ. The 168 draws 4.9W while the 194 draws 3.78W, which is a relevant distinction when considering substitutions between the two types.
The 2000-2001 4Runner stepwell uses the DE3175, a 31mm festoon bulb with end-cap contacts rated at 12V. This bulb type differs fundamentally in its physical format from the T10 wedge bulbs used in other model years, as festoon bulbs seat into spring-clip holders rather than wedge sockets.
The 1995 4Runner stepwell uses the DE3022, also a 31mm festoon bulb with end-cap contacts at 12V. The DE3022 and DE3175 share the same 31mm length and contact style, though they carry distinct ANSI designations.
The shift from festoon-type bulbs in the 2000-2001 model years to T10 wedge-type bulbs in later years reflects a change in socket design. These two bulb formats are not physically interchangeable due to their different mounting mechanisms.
All bulb types listed across the 4Runner stepwell specifications conform to ANSI standards applicable in both the United States and Canada, indicating consistent electrical and physical tolerances within those markets.