Toyota Tercel Parking Light Bulb Size

Additional Notes

• The Toyota Tercel parking light specifications cover model years 1980-1998, with three distinct bulb types used across that span: the 1157, 168, and 194.
• The 1157 is the most frequently specified bulb across the Tercel's parking light history, appearing in the 1980-1982 and 1991-1998 model years.
• The 1157 is a dual-filament bulb rated at 12V with a 21W/5W output and a BAY15d bayonet base, making it physically and electrically distinct from the single-filament wedge-type bulbs used in other Tercel model years.
• The 168 and 194 are both T10 miniature wedge bulbs operating at 12V, though they differ in wattage: the 168 draws 4.9W while the 194 draws 3.78W. Despite their shared form factor, they are not rated identically and are not listed as interchangeable within these specifications.
• The Toyota Tercel (1988-1990) uses the 168 bulb for parking lights, while the 1983-1986 model years use the 194. Both are T10 wedge-type bulbs, but substituting one for the other would involve a wattage difference.
• The BAY15d bayonet base of the 1157 requires a twist-lock socket, which is mechanically incompatible with the wedge-style sockets used by the 168 and 194 bulbs. Vehicles specifying the 1157 cannot accept T10 wedge bulbs without socket modification.
• All three bulb types listed are ANSI standards applicable to the US and Canadian markets, indicating these specifications are region-specific and may differ from Tercel variants sold in other markets.
• The dual-filament design of the 1157 allows it to serve two brightness levels from a single housing, a characteristic absent in the single-filament 168 and 194 wedge bulbs.