Lexus GS350 Map Light Bulb Size

The Lexus GS350 map light requires a 12961 bulb size for proper installation and function within the interior overhead lighting assembly. Data for the specific component covers the range from 2007 to 2011.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2007-2011	12961

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The Lexus GS350 uses the 12961 bulb for the map light across the 2007-2011 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
T10 refers to the bulb's tubular shape, with the number indicating a width of 10 millimeters.
The 12961 uses a W2.1x9.5d wedge base, which is a pinless base type that is held in place by friction within the socket rather than by pins or a bayonet mechanism.
The bulb operates at 12 volts and 5 watts, consistent with low-current interior lighting applications in passenger vehicles.
The W2.1x9.5d base designation is standardized, meaning other bulbs sharing this base type are physically interchangeable at the socket level, though electrical ratings may differ.
The T10 wedge format is one of the most widely used bulb types in automotive interior lighting, commonly found in map, dome, and courtesy light positions across many vehicle makes.