Mercury Cougar Turn Signal Bulb Size

Mercury Cougar front and rear turn signal bulbs utilize 3757NA, 3157NA, and 2357NA sizes for forward applications, while rear positions employ 1156, 3157, and 3357 bulb sizes. The replacement chart covers 1967 through 2002 production years with corresponding bulb size specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Turn Signal

YearsBulb Size
2001-20023757NA
1999-20003157NA
1989-19973157NA
19882357NA
19873157NA
1985-19861157
1983-19841157NA
1977-19801034NA
19761157NA
1974-19751034NA
19731157NA
19721157
19711157NA
1967-19701034NA

Rear Turn Signal

YearsBulb Size
1999-20021156
1994-19973157
1992-19933357
1987-19913157
1984-19861157
19832057
1967-19801157

Bulb Specifications

Description Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V.3757NA
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.3157NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 26.9W/8W.2357NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.1157
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W.1157NA
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Variant of 1157. 12V, 21/5W.1034NA
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.1156
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.3157
ANSI standard (US & Canada). Single-filament wedge bulb (T25). 12V, 27W.3357
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.2057

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