Lexus ES330 front and rear side marker bulbs utilize 194 and 168 bulb sizes respectively. The replacement chart covers 2004 to 2006 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus ES330 uses two distinct bulb sizes for its side marker lights across the 2004-2006 model years: size 194 at the front and size 168 at the rear.
Both the 194 and 168 bulbs share the T10 miniature wedge base form factor, meaning they are physically similar in housing shape but are not interchangeable due to differences in wattage.
The 194 bulb operates at 12V and draws 3.78W, while the 168 bulb operates at 12V and draws 4.9W, making the rear marker bulb the higher-wattage unit of the two.
Both bulbs conform to ANSI standards applicable in the United States and Canada, classifying them as standardized replacements within those markets.
The T10 wedge base is a common miniature bulb format in automotive lighting, where the bulb is held in its socket by the tension of the base itself rather than by a bayonet or screw mechanism.
The wattage difference between the 194 and 168 bulbs means that substituting one for the other would result in either under- or over-powering the circuit relative to its original specification.
The front side marker position on the Lexus ES330 (2004-2006) calls for the lower-wattage 194 bulb, while the rear side marker position requires the higher-wattage 168 bulb.