Toyota Highlander Fog Light Bulb Size

Additional Notes

• The Toyota Highlander front fog light draws from four distinct bulb types across its model history: H16, 12278, H11, 9006, and H3. All are single-filament halogen bulbs operating at 12 volts, though their wattage and base types differ significantly.
• The H16 is an ECE-standardized bulb rated at 19W with a PGJ19-3 base. It is the front fog light bulb for the Toyota Highlander across the 2014-2019 model years, making it the most consistently used fog light bulb in the Highlander's specification history.
• The 12278 is a Philips part number designation rather than an industry-wide standard. It carries a PG18.5d-3 base and is rated at 26W, placing it between the low-wattage H16 and the higher-wattage H11 in output. It applies to the 2011-2013 model years.
• The H11 is an ECE-standardized bulb with a PGJ19-2 base, rated at 55W, and holds approval in the United States as well. Despite sharing the same voltage and wattage as the 9006 and H3, its base type is not interchangeable with either of those bulbs.
• The 9006 follows the ANSI standard used in the US and Canada. It uses a P22d base and is rated at 12V, 55W. It applies to the 2004-2005 model years and the Toyota Highlander built from August 2003 onward within the 2003 model year.
• The 2003 model year Toyota Highlander carries two different front fog light specifications depending on production date. Units produced before August 2003 use the H3 bulb, while those produced from August 2003 onward use the 9006. These two bulbs have different base types and are not interchangeable.
• The H3 uses a PK22s base and is rated at 12V, 55W. It holds ECE approval and is also recognized in the US and Japan. It applies to the 2001-2002 model years and to 2003 units produced before August 2003.
• Although the H11, 9006, and H3 all share a 12V, 55W rating, their base types, PGJ19-2, P22d, and PK22s respectively, are physically distinct and not interchangeable with one another.