The Nissan 520 Pickup front turn signal requires a 1157 bulb size while the rear turn signal uses a P21W bulb size. The replacement chart covers 1965 to 1968 model 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 520 Pickup uses two distinct bulb types across its turn signal positions, with the front and rear positions each requiring a different standard for the 1965-1968 model years.
The 1157 is an ANSI-standard bulb used in the North American market, operating at 12V with a dual-filament configuration rated at 21W and 5W, and it seats into a BAY15d bayonet base.
The dual-filament design of the 1157 allows it to serve two lighting functions from a single housing, with the higher 21W filament typically handling the turn signal function and the lower 5W filament serving a secondary role such as parking or running light.
The front turn signal position on the Nissan 520 Pickup calls for the 1157 across all four model years, 1965-1968.
The P21W is an ECE-standard bulb used in European and worldwide markets, operating at 12V with a single filament rated at 21W, and it seats into a BA15s bayonet base.
The rear turn signal position on the Nissan 520 Pickup calls for the P21W across all four model years, 1965-1968.
The 1157 and P21W are not interchangeable. The BAY15d base of the 1157 has two offset pins at different heights, while the BA15s base of the P21W has a single pin, making physical substitution between the two impossible without modification.
The difference in filament count between the two bulbs is also a functional distinction. The single-filament P21W in the rear is dedicated solely to the turn signal function, unlike the dual-filament 1157 in the front.