MG MGB Turn Signal Bulb Size

The MG MGB front turn signal bulb uses a 1157 size, while rear turn signal applications accommodate either 1156 or 1157 bulb sizes. The replacement chart covers 1969 to 1980 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

YearsUS TypeEU TypeShop
1969-19791157P21/5WCheck Price

Rear Turn Signal

YearsUS TypeEU TypeShop
1976-19801156P21WCheck Price
1969-19751157P21/5WCheck 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). Single-filament bulb with BA15s bayonet base. 12V, 21W.1156Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W.P21WCheck Price

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