Pontiac Sunbird Map Light Bulb Size

The Pontiac Sunbird map light requires bulb sizes 192, 90, 168, and 561 depending on the specific version of the vehicle. Data for the bulb sizes covers the range from 1989 to 1994.

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
1994	192
1993	90
1992	168
1991	561
1989-1990	90

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3W.	192
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561

Other Locations

Additional Notes

The Pontiac Sunbird map light specifications span model years 1989 through 1994 and reference four distinct bulb types: 192, 90, 168, and 561.
The bulb 90 is the most frequently specified type across these years, appearing in the 1989-1990 and 1993 model years. It is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V and 13W.
The BA15s bayonet base on the 90 bulb uses a single contact pin, which is not interchangeable with dual-pin bayonet bases such as BA15d, despite a similar physical appearance.
The 192 and 168 bulbs are both T10 miniature wedge types operating at 12V, though they differ in wattage. The 192 is rated at 3W while the 168 is rated at 4.9W.
Although the 192 and 168 share the same T10 wedge base form factor, their differing wattage ratings mean one is not a direct substitute for the other without accounting for the difference in light output and circuit load.
The 1991 Pontiac Sunbird map light takes a 561 festoon bulb, which is 44mm in length and makes contact through end caps rather than a wedge or bayonet base. It is rated at 12V and 12W.
Festoon bulbs are held in place by spring-loaded clips at each end, and the 44mm length of the 561 is a fixed fitment requirement. A festoon bulb of a different length would not seat correctly in the same housing.
All four bulb types listed in these specifications conform to ANSI standards applicable in both the United States and Canada.