Mercury Montclair Back Up Light Bulb Size
The Mercury Montclair back up light requires 1129, 1141, or P21W bulb sizes depending on the specific application. Available information covers the period from 1955 through 1968.
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
If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 1967-1968 | 1156 | P21W | Check Price |
| 1964-1966 | 1141 | 1141 | Check Price |
| 1958-1960 | 1156 | P21W | Check Price |
| 1956-1957 | 1141 | 1141 | Check Price |
| 1955 | 1129 | 1129 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1141 | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W. | 1129 | Check Price |