The White WX front and rear turn signal bulbs utilize 1157 or 2057 size specifications. The replacement chart covers 1981 through 1988 production years with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The two bulb types specified for the White WX are the 1157 and 2057, both of which are ANSI-standard dual-filament bulbs rated at 12 volts and sharing the BAY15d bayonet base.
The BAY15d base is an offset twin-pin bayonet fitting, where the two pins are positioned at different heights to ensure correct orientation during installation and prevent the filaments from being wired in reverse.
The 1157 is rated at 21W on its high-intensity filament and 5W on its low-intensity filament, while the 2057 draws 26.9W and 8W respectively, making the 2057 the higher-wattage of the two types.
Despite the wattage difference, the 1157 and 2057 share the same BAY15d base, which can create a physical fit in the same socket, though the electrical draw differs between them.
The 1981-1987 White WX uses the 2057 bulb in both the front and rear turn signal positions, with the fitment applying specifically to units designated as Except Conventional.
The 1988 White WX uses the 1157 bulb for both the front and rear turn signals, with no trim or configuration qualifier attached to that model year.
The Except Conventional qualifier on the 1981-1987 entries indicates that the 2057 specification does not apply to the Conventional configuration of the WX during those years.
The 2057 is described as a brighter variant of the 1157, a characteristic attributable to its higher wattage output on both filaments rather than any difference in base type or voltage rating.