Chevrolet Brookwood Instrument Panel Bulb Size

The Chevrolet Brookwood instrument panel utilizes 1895, 194, 57, and 257 bulb sizes for illumination. Data for the specific components covers the period from 1958 through 1972.

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
1972	1895
1971	194
1969-1970	1895
1961	57
1958-1960	257

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 0.9W.	1895
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W.	57
ANSI standard (US & Canada). Festoon or BA9s base instrument bulb. 12V, 2W.	257

Other Locations

Additional Notes

The 1895 bulb is the most frequently specified instrument panel bulb across the Chevrolet Brookwood's documented years, appearing in the 1969-1970 and 1972 model years. It is an ANSI-standard miniature wedge bulb in the T5 form factor, rated at 12V and 0.9W.
The 257 bulb is the second most recurring type, specified for the 1958-1960 model years. It is an ANSI-standard instrument bulb rated at 12V and 2W, and it accommodates either a festoon or BA9s base configuration.
The 1971 Brookwood is the only model year in these specifications to use the 194 bulb. This is an ANSI-standard miniature wedge bulb in the larger T10 form factor, rated at 12V and 3.78W, making it the highest-wattage instrument panel bulb listed across all documented years.
The 57 bulb is exclusive to the 1961 model year in these specifications. It is an ANSI-standard single-filament bulb with a BA9s bayonet base, rated at 12V and 1W.
The T5 and T10 designations on the 1895 and 194 bulbs refer to the tubular envelope width measured in eighths of an inch, meaning the T5 is 5/8 inch wide and the T10 is 10/8 inch wide. These two bulbs share a wedge base style but are not interchangeable due to the difference in physical size and wattage.
The 257 bulb's dual base compatibility with festoon and BA9s fittings means the socket type in the vehicle determines which physical form of the bulb is applicable. The 57 bulb also uses a BA9s base, though the two bulbs differ in wattage and are distinct part numbers that are not interchangeable.
All four bulb types listed across these specifications conform to ANSI standards recognized in both the United States and Canada, indicating consistent regulatory compliance across the full range of documented model years.
The instrument panel bulb specification changed from the 257 type used in 1958-1960 to the 57 type in 1961, and then shifted again to the 1895 type by 1969, reflecting at least two distinct socket or fitment changes across the Brookwood's documented production span.