The Saturn L300 brake light utilizes 3157 and 2458 bulb sizes for the rear lighting system. Data for the specific components covers the period from 2001 through 2005.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Saturn L300 uses the 3157 bulb for brake lights across all listed model years, spanning 2001-2005.
The 3157 is a dual-filament bulb, meaning it serves two brightness levels within a single unit, typically supporting both running light and brake light functions through separate filaments rated at 7W and 27W respectively.
The 3157 follows the T25 wedge form factor and operates at 12 volts, consistent with standard automotive electrical systems.
The 3157 carries ANSI standardization for the US and Canadian markets, indicating it conforms to a defined set of electrical and physical specifications shared across compliant manufacturers.
The Center High Mount Stop Light on the Saturn L300 uses the PC168 bulb across all listed model years, spanning 2001-2005.
The PC168 is a miniature wedge bulb in the T10 form factor, fitted with a printed circuit board twist-lock socket rather than a conventional bulb socket.
The twist-lock socket design of the PC168 is specific to printed circuit board applications such as instrument clusters, which means it is not interchangeable with standard T10 wedge bulbs despite sharing the same general form factor.
The PC168 operates at 12 volts and also holds ANSI standardization for the US and Canadian markets.
The 3157 and PC168 serve distinct functions on the Saturn L300 and are not interchangeable with each other, as they differ in socket type, filament configuration, and wattage.