Buick Century Dome Light Bulb Size

The Buick Century dome light utilizes bulb sizes 906, 168, 90, 561, 212-2, 211-2, and 1004 across various production periods. Available data covers the range of 1954 through 2005.

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
1998-2005	906
1997	168
1985	90
1983-1984	561
1980-1982	212-2
1979	561
1978	211-2
1977	212-2
1975-1976	561
1973-1974	211-2
1957-1958	1004
1954-1956	90

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1004

Other Locations

Additional Notes

The 906 bulb is the most frequently specified dome light size across the Buick Century, covering the 1998-2005 model years. It is a T10 miniature wedge bulb rated at 12V and 8W under the ANSI standard.
The 561 is the second most recurring bulb type in these specifications, appearing in the 1975-1976, 1979, and 1983-1984 model years. It is a festoon-style bulb with a 44mm length and end-cap contacts, rated at 12V and 12W.
The 212-2 bulb appears in the 1977, and 1980-1982 model years. It is a festoon bulb with an SV8.5 base and a 41mm length, also rated at 12V and 12W.
The 211-2 bulb is specified for the 1973-1974 and 1978 model years. It shares the same SV8.5 base, 41mm length, and 12V/12W rating as the 212-2, making the two bulbs closely related in physical and electrical characteristics.
Although the 211-2 and 212-2 share identical voltage, wattage, base type, and length, they carry distinct ANSI designations and are not confirmed as interchangeable within these specifications.
The 1004 bulb is specified for the Buick Century in the 1957-1958 model years. It is a dual-filament bulb with a BAY15d bayonet base rated at 12V and 21/5W, and it is noted as a variant of the 1157 bulb type.
The 906 and 168 bulbs both use the T10 wedge form factor, but the 168 is rated at 4.9W while the 906 is rated at 8W. The 168 is specified only for the 1997 model year, and the wattage difference means the two are not electrically equivalent despite their shared base type.
The 90 bulb uses a BA15s single-contact bayonet base and is rated at 12V and 13W. It is specified for the 1954-1956 and 1985 model years, making it one of the higher-wattage dome light bulbs across the full range of these specifications.