The Saturn LW300 side marker utilizes 194 and 12961 bulb sizes for the exterior lighting components. Data for the specified vehicle covers the period from 2001 to 2003.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Saturn LW300 uses the 12961 bulb across both its front and rear side marker positions, making it the sole bulb type present in these specifications.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor with a W2.1x9.5d base, rated at 12 volts and 5 watts.
The T10 designation refers to a tubular bulb approximately 10mm wide, and the W2.1x9.5d base describes a wedge-style base that seats by friction rather than by a bayonet or screw mechanism.
At 5 watts, the 12961 is a low-output bulb suited to marker and position lighting functions rather than primary illumination.
The front side marker position on the Saturn LW300 uses the 12961 bulb across the 2001-2003 model years.
The rear side marker position uses the same 12961 bulb for the 2001-2002 model years.
Because the front and rear side marker positions share the same bulb specification, a single 12961 unit is physically interchangeable between both locations on applicable model years.
The W2.1x9.5d wedge base is a standardized international base type, meaning compatible replacements from other manufacturers sharing that base and the 12V, 5W rating would fit the same socket.