Nissan 260Z front turn signal requires a 1157 bulb size while the rear turn signal uses a 1156 bulb size. The replacement chart covers 1974 to 1975 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Nissan 260Z uses two distinct ANSI-standard bulb types across its front and rear turn signal positions for the 1974-1975 model years.
The 1157 bulb is a dual-filament type rated at 12V with a 21W main filament and a 5W secondary filament, mounted on a BAY15d bayonet base.
The BAY15d base features offset pins, which physically prevents substitution with single-filament bulbs sharing a visually similar base style.
The 1156 bulb is a single-filament type rated at 12V at 21W, mounted on a BA15s bayonet base with symmetrically placed pins.
The front turn signal position on the Nissan 260Z takes the 1157 bulb across both the 1974 and 1975 model years.
The rear turn signal position uses the 1156 bulb, which carries only a single filament, reflecting a dedicated turn signal function without a combined parking light role at that position.
The dual-filament design of the 1157 makes it suitable for positions where two separate electrical functions, such as turn signaling and parking illumination, share a single housing.
Both the 1157 and 1156 are governed by ANSI standards applicable to the United States and Canada, meaning their electrical and physical specifications conform to a defined North American classification.
The 1157 and 1156 bulbs are not interchangeable despite both using bayonet-style bases, as the differing pin configurations of BAY15d and BA15s prevent cross-fitting.