Chevrolet Biscayne Ash Tray Bulb Size

The Chevrolet Biscayne ash tray utilizes bulb sizes 1445 and 53 for illumination purposes within the interior dashboard assembly. Available data covers the specific range 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
1964-1972	1445
1958-1963	53

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W.	1445
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 2W.	53

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Additional Notes

The Chevrolet Biscayne ash tray position uses two distinct bulb sizes across its production span: the 53 for model years 1958-1963 and the 1445 for model years 1964-1972.
Both the 53 and the 1445 are ANSI-standardized bulbs recognized in the United States and Canada, each operating at 12 volts with a 2-watt output and a single filament.
Both bulb types share the BA9s base, a miniature bayonet fitting with a 9mm cap body, which is a common format in low-wattage automotive indicator and courtesy lighting applications.
Despite sharing identical electrical ratings (12V, 2W), a single filament, and the same BA9s base, the 53 and the 1445 carry different ANSI designations, which can indicate differences in physical envelope size or light output characteristics that affect fitment.
Because the two bulb numbers are not listed as interchangeable within these specifications, substituting one for the other across the 1963-1964 model year boundary is not supported by the provided data.