Chrysler Saratoga Back Up Light Bulb Size

Chrysler Saratoga back up light bulb sizes include 1156, 1073, and 1129 configurations for this model. The replacement chart covers vehicle production years spanning 1951 to 1960.

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
1958-1960	1156
1957	1073
1951-1952	1129

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	1073
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1129

Other Locations

Additional Notes

The back up light bulbs specified for the Chrysler Saratoga across the listed model years fall into three ANSI standard types: the 1156, 1073, and 1129, all rated at 12 volts and all using bayonet-style bases.
The 1156 is the most frequently specified bulb across the listed years, covering the 1958-1960 Saratoga. It is a single-filament bulb with a BA15s bayonet base rated at 21 watts.
The BA15s base found on the 1156 is a single-contact bayonet fitting, meaning the base has one electrical contact point at its center. This distinguishes it from dual-contact bayonet bases used on multi-filament bulbs.
The 1957 Saratoga uses the 1073 bulb, which shares the same BA15s bayonet base as the 1156 but operates at a lower wattage of 13 watts rather than 21 watts. Despite the physical base compatibility, the two bulbs are not interchangeable due to the wattage difference.
The 1951-1952 Saratoga uses the 1129 bulb, which is a dual-filament type with a BAY15d bayonet base rated at 21 watts and 5 watts across its two filaments.
The BAY15d base on the 1129 is a dual-contact bayonet fitting with offset pins, a physical design that prevents it from being inserted into a BA15s socket. This makes the 1129 physically incompatible with sockets designed for the 1156 or 1073.
The 1129 is noted as a variant of the 1157. Both share the BAY15d base and dual-filament configuration, though they differ in their specific wattage ratings.