Toyota Highlander Stepwell Bulb Size

Additional Notes

• The Toyota Highlander stepwell position uses the 168 bulb across all listed model years from 2001 to 2019.
• The 168 is an ANSI-standardized bulb type recognized in both the United States and Canada, operating at 12 volts with a power draw of 4.9 watts.
• The 168 belongs to the T10 miniature wedge family, a form factor defined by a wedge-shaped base that makes direct socket insertion possible without a separate metal cap or pins.
• The T10 wedge base is a widely shared platform, meaning multiple bulb types occupy the same physical socket; however, wattage and voltage ratings must match the original specification to avoid electrical or thermal issues.
• At 4.9 watts, the 168 is a low-output bulb suited to courtesy and interior illumination functions such as stepwell lighting, where broad-spectrum task lighting rather than high intensity is the design intent.
• The consistent use of a single bulb number across the 2001-2019 model range indicates that the stepwell socket specification remained unchanged through multiple Highlander generations.