Chevrolet Corvair High Beam Indicator Bulb Size

Additional Notes

• The Chevrolet Corvair uses two bulb sizes for the high beam indicator across its production run: the 1445 and the 53, both of which are ANSI-standardized for the US and Canadian markets.
• The 1445 and 53 bulbs share identical electrical and construction characteristics, as both are single-filament bulbs with a BA9s base rated at 12 volts and 2 watts.
• The BA9s base is a miniature bayonet cap with a 9mm body, commonly found in instrument panel indicator applications where low power draw and compact size are required.
• At 2 watts, both bulb types draw minimal current, which is typical for dashboard indicator lamps that are intended only to signal a condition rather than provide illumination.
• The Chevrolet Corvair (1965-1969) uses the 1445 bulb size for the high beam indicator.
• The 1960-1964 model years use the 53 bulb size for the same high beam indicator position.
• Despite the difference in part numbers, the 1445 and 53 bulbs are electrically equivalent, as they share the same voltage rating, wattage, base type, and filament count.
• The shared BA9s base between the 1445 and 53 raises a fitment consideration, as physical interchangeability does not guarantee that both part numbers are approved interchangeable replacements for a given model year without consulting manufacturer fitment data.