Mercury Montego Turn Signal Bulb Size
Mercury Montego front and rear turn signal bulbs utilize 3157NA, 1157NA, and 1034NA sizes, with the bulb specifications varying across model generations. The replacement chart covers 1968 through 2007 production years and documents corresponding turn signal bulb size requirements.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Front Turn Signal
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 |
|---|---|---|---|
| 2005-2007 | 3157NA | PY27/7W | Check Price |
| 1975-1976 | 1157NA | P21/5W | Check Price |
| 1973-1974 | 1034NA | 1034NA | Check Price |
| 1972 | 1157NA | P21/5W | Check Price |
| 1971 | 1034NA | 1034NA | Check Price |
| 1970 | 1157 | P21/5W | Check Price |
| 1969 | 1157NA | P21/5W | Check Price |
| 1968 | 1034NA | 1034NA | Check Price |
Rear Turn Signal
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 2005-2007 | 3157NA | PY27/7W | Check Price |
| 1968-1976 | 1157 | P21/5W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W. | 3157NA | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W. | 1157NA | Check Price |
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W. | P21/5W | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Variant of 1157. 12V, 21/5W. | 1034NA | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 | Check Price |