The Lexus SC430 front and rear side marker bulbs both utilize a 168 size bulb for proper illumination. The replacement chart covers vehicle production spanning 2002 to 2010 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 SC430 uses the 168 bulb size for both front and rear side markers across the 2002-2010 model years.
The 168 bulb is classified as a miniature wedge type, designated T10 in the international bulb sizing system, which refers to its tubular wedge-base form factor.
This bulb operates at 12 volts and draws 4.9 watts, placing it in the low-wattage range typical of side marker applications.
The 168 designation follows ANSI standards recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across those markets.
The T10 wedge base connects directly into a socket without a separate metal base or bayonet pins, which is a common trait of miniature wedge bulbs used in marker and courtesy lighting positions.
Because the same 168 bulb is specified for both the front and rear side marker positions on the SC430, a single bulb type serves both locations across the entire production run covered by these specifications.
The consistent use of the 168 bulb across all listed model years means no fitment variation exists between earlier and later SC430 vehicles within the 2002-2010 range for this application.