The Nissan 310 uses two distinct bulb types across its side marker positions: the 67 and the 158, both of which are ANSI-standardized bulbs for the US and Canadian markets.
The 67 bulb is a single-filament type with a BA15s bayonet base, rated at 12V and 8W. The BA15s designation indicates a single-contact bayonet fitting, which is not interchangeable with dual-contact bayonet bases.
The 158 bulb is a miniature wedge type in a T10 form factor, rated at 12V and 3W. Its wedge base design differs fundamentally from the bayonet base of the 67, making the two bulb types physically incompatible with each other.
The 67 bulb is described as a lower wattage variant of the 1156. While the two share the BA15s bayonet base, the 1156 operates at a significantly higher wattage, and the two are not direct substitutes in applications where wattage tolerance is a factor.
For the Nissan 310, the 1980 model year uses the 158 bulb in both the front and rear side marker positions, while the 1979, 1981, and 1982 model years use the 67 bulb in those same positions.
The front and rear side marker positions share identical bulb specifications for each model year, meaning no distinction exists between front and rear fitment requirements within a given year.
The 1980 model year represents an isolated case where the lower-wattage 158 bulb at 3W was used, compared to the 8W rating of the 67 bulb used in all other listed years.
Because the 1980 model year uses a wedge-base bulb and surrounding years use a bayonet-base bulb, a direct socket-compatible substitution between 1980 and adjacent model year components is not supported by these specifications.