Chevrolet Corvair Engine Compartment Light Bulb Size

Chevrolet Corvair engine compartment light bulb sizes include 93, 1156, and 94 specifications across different production configurations. The replacement chart covers 1960 through 1969 model years with corresponding bulb size data.

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
1969	93
1965-1968	1156
1960-1964	94

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	93
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	94

Other Locations

Additional Notes

The 1156 bulb is the most frequently specified type across the Chevrolet Corvair engine compartment light fitment data, covering the 1965-1968 model years.
The 1156 is an ANSI-standard single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base.
The 1969 Corvair uses the 93 bulb, which shares the same BA15s bayonet base and single-filament construction as the 1156 but operates at a lower wattage of 13W versus 21W.
Because the 93 and 1156 share the BA15s bayonet base, the two types are physically interchangeable in terms of socket fitment, though their wattage ratings differ.
The 94 bulb is specified for the 1960-1964 model years and carries a dual-filament design rated at 12V with a 21/5W output, meaning it draws 21W on one filament and 5W on the other.
The 94 uses a BAY15d bayonet base, which is an offset-pin base distinct from the single-pin BA15s base found on the 93 and 1156 bulbs, making the 94 physically incompatible with sockets designed for those types.
The 94 is described as a variant of the 1157, a widely recognized dual-filament automotive bulb, and the two share the same BAY15d base configuration.
A transition in base type occurs between the 1964 and 1965 model years, where the specification shifts from the dual-filament BAY15d-based 94 to the single-filament BA15s-based 1156.
All three bulb types, the 93, 1156, and 94, conform to ANSI standards applicable in both the United States and Canada.
All specified bulbs operate on a 12V electrical system, consistent with the standard automotive voltage used across the full 1960-1969 production span covered in the data.