Pontiac G5 Map Light Bulb Size

The Pontiac G5 map light requires bulb size 212-2 or 12961 depending on the specific interior configuration. Data for the specified lighting components covers the range from 2007 to 2009.

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
2008-2009	212-2
2007	212-2 (Front)
2007	12961 (Rear)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The 212-2 is an ANSI-standardized bulb type, meaning its specifications are defined by a recognized North American standards body and the designation is consistent across manufacturers in the US and Canada.
The 212-2 is a festoon bulb, a form factor characterized by a cylindrical body with end caps that make contact with spring-loaded holders rather than a socket. Its length is 41mm and it uses an SV8.5 base, operating at 12V and 12W.
The 12961 is a Philips part number rather than an ANSI designation, which means it is a manufacturer-specific reference. It corresponds to a miniature wedge bulb in the T10 form factor, using a W2.1x9.5d base at 12V and 5W.
The T10 wedge base (W2.1x9.5d) on the 12961 is a push-in connector type, physically incompatible with the spring-loaded festoon holder used by the 212-2. The two bulb types are not interchangeable.
The Pontiac G5 used the 212-2 as the sole map light bulb size for the 2008-2009 model years, with no positional distinction noted for those years.
The 2007 Pontiac G5 is the only model year in these specifications to carry two distinct map light bulb sizes, with the 212-2 assigned to the front position and the 12961 assigned to the rear position.
The wattage difference between the two 2007 bulbs is significant: the front 212-2 draws 12W while the rear 12961 draws 5W, reflecting the different physical and electrical designs of festoon versus wedge bulb formats.