Saturn SW2 front turn signal bulbs use 3457NA, 3357NA, or 3157NA sizes, while rear turn signal bulbs use 1156 or 2456 sizes. The replacement chart covers 1993 through 2001 vehicle 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.
The Saturn SW2 front turn signal position uses three distinct bulb types across its production years: the 3157NA for 1993-1994, the 3357NA for 1995-1996, and the 3457NA for 1997-2001.
The 3457NA and 3157NA are both dual-filament T25 wedge bulbs rated at 12V with a 27W/7W output, meaning one filament handles the higher-wattage turn signal function while the second filament serves a lower-wattage secondary role.
The 3357NA, used in the 1995-1996 front turn signal position, is a single-filament T25 wedge bulb rated at 12V and 27W, distinguishing it functionally from the dual-filament 3457NA and 3157NA types used in adjacent model years.
All three front turn signal bulb types carry the "NA" suffix, which denotes natural amber glass. This coloring is built into the glass envelope itself rather than relying on an amber lens to produce the required signal color.
All three front turn signal bulb types share the T25 wedge form factor and ANSI standardization for the US and Canadian markets, though their filament configurations and wattage ratings differ.
The Saturn SW2 rear turn signal position uses two distinct bulb types: the 2456 festoon bulb for 1993-1995, and the 1156 for 1996-2001.
The 1156 is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W. The BA15s base uses a single contact pin, which is not interchangeable with dual-pin bayonet bases such as the BA15d.
The 2456 is classified as a festoon bulb intended for specialty applications, rated at 12V. Festoon bulbs are cylindrical in shape and mount by contact pressure at each end rather than using a base socket, making them physically incompatible with the bayonet-socket housings used by the 1156.
The rear turn signal position on the Saturn SW2 (1996) marks the transition from the 2456 festoon type to the 1156 bayonet type, indicating a housing change between the 1995 and 1996 model years that affects physical fitment.
All bulb types specified across both turn signal positions conform to ANSI standards applicable to the US and Canadian markets.