Dodge Custom Back Up Light Bulb Size

Dodge Custom back up light bulb sizes include 1156, 1073, and 1129 configurations for this vehicle model. The replacement chart covers 1954 through 1961 production years with corresponding bulb specifications.

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
1958-1961	1156
1956-1957	1073
1954-1955	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 1156 bulb is the most frequently specified back up light bulb across the Dodge Custom lineup, covering the 1958-1961 model years.
The 1156 is a single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base, and recognized under ANSI standards in both the US and Canada.
The 1073 bulb was specified for the Dodge Custom in the 1956-1957 model years and shares the same BA15s bayonet base as the 1156.
Although the 1073 and 1156 share a BA15s base, the 1073 operates at a lower wattage of 13W compared to the 1156 at 21W, making them non-interchangeable without accounting for that difference.
The 1129 bulb was specified for the 1954-1955 model years and is a dual-filament bulb rated at 12V with a 21/5W output, fitted with a BAY15d bayonet base.
The BAY15d base of the 1129 is physically distinct from the BA15s base used by both the 1156 and 1073, meaning the 1129 is not interchangeable with either of those bulbs.
The 1129 is classified as a variant of the 1157 bulb, sharing its dual-filament design and BAY15d base type.
All three bulb types specified across the Dodge Custom back up light positions conform to ANSI standards applicable in the US and Canada.