Mercury Monterey Back Up Light Bulb Size

The Mercury Monterey back up light utilizes bulb sizes 2456, 2356, P21W, 1076, 1156, 1141, 1073, and 1129. Available data for the specified components covers the range from 1950 to 2007.

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
2005-2007	2456
2004	2356
1974	1156
1973	1076
1968-1972	1156
1967	1141
1963-1966	1156
1962	1073
1959-1961	1156
1956-1958	1141
1950-1955	1129

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, specialty application. 12V.	2456
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V.	2356
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. Variant of 1156. 12V, 8W.	1076
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 Mercury Monterey back up light specifications span model years 1950 through 2007, covering several distinct bulb types across that range.
The 1156 is the most frequently specified bulb across the Monterey lineup, appearing in model years 1959-1966, 1968-1972, and 1974. It is a single-filament bulb with a BA15s bayonet base rated at 12V and 21W.
The 1129 bulb is specified for the Mercury Monterey across model years 1950-1955. Unlike the more common single-filament types in this list, the 1129 is a dual-filament bulb with a BAY15d bayonet base rated at 12V and 21/5W, making it a variant of the 1157.
The 1141 bulb shares the same BA15s bayonet base and 12V, 21W rating as the 1156, yet the two are not the same part number and are not listed interchangeably within these specifications.
The 2456 is a festoon-style bulb designated for a specialty application, rated at 12V, and is specified for the Monterey for model years 2005-2007.
The 2356 is a dual-filament bulb with a BAY15d bayonet base rated at 12V, specified solely for the 2004 Mercury Monterey, distinguishing it from the festoon-type 2456 used in the three following model years.
The 1073 and 1076 are lower-wattage single-filament variants within the BA15s bayonet family, specified for the 1962 and 1973 Monterey respectively, in place of the standard 1156 used in surrounding years.
BAY15d bayonet bases, found on the 1129 and 2356 bulbs, feature offset pins to prevent incorrect installation, a physical distinction from the symmetrical BA15s base used on single-filament types such as the 1156 and 1141.
All bulb types listed across the full model year range conform to ANSI standards applicable in both the United States and Canada.
The 1967 Monterey uses the 1141 bulb rather than the 1156 specified for most surrounding years, indicating a fitment difference that makes the two types non-interchangeable for that model year despite their shared base type and wattage rating.