Studebaker Avanti Back Up Light Bulb Size

The Studebaker Avanti back up light requires a bulb size of 1141 for the specified lighting component. Data for the requested bulb specifications covers the range from 1963 to 1964.

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
1963-1964	1141

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1141

Other Locations

Additional Notes

The 1141 is the sole bulb type listed for the Studebaker Avanti backup light across both model years covered in the specifications, spanning 1963-1964.
The 1141 operates on a 12-volt electrical system and draws 21 watts, placing it in the range typical of single-function automotive lighting applications.
As a single-filament bulb, the 1141 serves one dedicated function, which in this context is the backup light circuit.
The 1141 uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin rather than the offset dual-pin arrangement found on BA15d bases. These two base types are not interchangeable.
The 1141 carries ANSI standardization recognized in both the United States and Canada, meaning the bulb conforms to a defined set of dimensional and electrical tolerances shared across compliant manufacturers.