Toyota Paseo Parking Light Bulb Size

Additional Notes

• The 1157 and 1157NA bulbs share identical electrical ratings of 12V with a dual-filament output of 21W and 5W, and both use a BAY15d bayonet base. The BAY15d base features two offset pins that prevent incorrect insertion orientation.
• The 1034NA is described as a variant of the 1157, carrying the same BAY15d bayonet base and 12V, 21W/5W ratings. Despite this relationship, the two part numbers are not the same designation and are listed separately under ANSI standards.
• The "NA" suffix on the 1157NA and 1034NA denotes natural amber glass, meaning the color is produced by the glass envelope itself rather than by a painted or coated exterior. This is a distinction relevant to compliance with regulations that specify amber output for parking lights in certain markets.
• The Toyota Paseo used the standard clear 1157 for the 1992 model year, then returned to it for 1996-1998, while the 1995 model year required the 1157NA with natural amber glass instead.
• The 1993-1994 model years specified the 1034NA, which carries a different ANSI number from the 1157NA despite sharing the same base type, voltage, and wattage. Substituting one for the other without confirming ANSI equivalency for a given application is not advised.
• All three bulb types listed across the full 1992-1998 production span are ANSI-standardized for the US and Canadian markets, meaning physical and electrical tolerances conform to a defined specification rather than being manufacturer-proprietary.
• The dual-filament design of all listed bulbs means each contains two separate tungsten filaments operating at different wattages. The higher 21W filament typically serves a brighter function, while the 5W filament serves a reduced-intensity function such as a standing or parking light.