Oldsmobile 88 Back Up Light Bulb Size

The Oldsmobile 88 back up light utilizes bulb sizes 2057 and 1073 for the rear illumination components. Data for the specified vehicle covers the range from 1954 through 1999.

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
1992-1999	2057
1954-1957	1073

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.	2057
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	1073

Other Locations

Additional Notes

The Oldsmobile 88 uses two distinct back up light bulb types across its model years: the 2057 for 1992-1999 and the 1073 for 1954-1957.
The 2057 is a dual-filament bulb operating at 12 volts with a wattage split of 26.9W and 8W across its two filaments, mounted on a BAY15d bayonet base.
The 1073 is a single-filament bulb rated at 12 volts and 13W, seated in a BA15s bayonet base.
The BAY15d base of the 2057 features two offset pins at different heights, which physically prevents it from being seated in a BA15s socket, making the two bulb types mechanically incompatible with each other.
The 2057 is a brighter variant of the 1157, sharing the same BAY15d base and dual-filament design while delivering higher wattage output on its primary filament.
The 1073 is a lower wattage variant of the 1156, sharing the same BA15s single-contact bayonet base but drawing less power at 13W compared to the 1156's 26.9W rating.
Both the 2057 and 1073 conform to ANSI standards recognized in the United States and Canada, placing them within a standardized North American bulb numbering system.
The Oldsmobile 88 models from 1992-1999 require a dual-filament bulb, meaning a single-filament replacement such as the 1073 would not fulfill the same electrical function even if physically adapted to fit.