Chrysler New Yorker Back Up Light Bulb Size

The Chrysler New Yorker back up light utilizes unique bulb sizes 921, P21W, 1156, 1141, 1073, and 1129. Available data covers the range from 1951 through 1996.

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
1994-1996	921
1989	1156
1978-1987	1156
1977	1141
1969-1976	1156
1968	1073
1967	1156
1966	1073
1962-1965	1156
1961	1073
1960	1156
1956-1959	1073
1951-1955	1129

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
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. 12V, 21W.	1141
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 Chrysler New Yorker back up light specifications span model years 1951 through 1996, covering four distinct bulb types across that range: 1129, 1073, 1156, and 921.
The 1156 is the most frequently specified bulb across the New Yorker lineup, appearing in model years 1960, 1962-1965, 1967, 1969-1980, and 1982-1989. It is a single-filament, 12V, 21W bulb with a BA15s bayonet base, conforming to ANSI standards for the US and Canadian markets.
The 1141 bulb, specified for the 1977 model year, shares the same BA15s bayonet base, 12V supply, and 21W output as the 1156. Despite these matching electrical characteristics, the two are distinct ANSI part numbers and are not confirmed as interchangeable in these specifications.
The 921 is a wedge-type bulb classified as T15, operating at 12V and 16W. It is specified for the 1994-1996 model years, representing a different base design from the bayonet-style bulbs used in earlier New Yorker models.
Because the 921 uses a wedge base rather than a bayonet base, it is physically incompatible with the sockets designed for the 1156, 1141, 1073, or 1129 bulbs used in prior model years.
The 1073 bulb appears in the 1956-1959, 1961, 1966, and 1968 model years. It shares the BA15s bayonet base with the 1156 but operates at a lower wattage of 13W, making it a lower-output single-filament variant at 12V.
The 1129 bulb is specified for the 1951-1955 model years. Unlike all other bulbs in these specifications, it is a dual-filament type with a BAY15d bayonet base, rated at 12V and 21/5W. The BAY15d base uses offset pins to prevent incorrect installation of a single-filament bulb in its place.
The BAY15d base of the 1129 is physically distinct from the BA15s base of the 1073, 1141, and 1156 bulbs. A BA15s bulb cannot serve as a direct drop-in replacement for a 1129 socket due to this base difference.
All bulb types listed in these specifications conform to ANSI standards applicable to both the United States and Canadian markets.
The 1073 and 1156 both use the BA15s bayonet base, but their wattage ratings differ at 13W and 21W respectively, which reflects a difference in filament resistance and light output that may affect back up light brightness.