Mercury Zephyr Turn Signal Bulb Size

Mercury Zephyr front and rear turn signal bulbs utilize 1157 and 1157NA sizes, with front applications accepting either bulb size and rear applications requiring the 1157 bulb. The replacement chart covers 1978 to 1983 model 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

YearsUS TypeEU TypeShop
1980-19831157P21/5WCheck Price
1978-19791157NAP21/5WCheck Price

Rear Turn Signal

YearsUS TypeEU TypeShop
1978-19831157P21/5WCheck Price

Bulb Specifications

Description Type Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.1157Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.P21/5WCheck Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W.1157NACheck Price

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