Mercury Tracer high and low beam headlight bulbs utilize 9007 and 9004 bulb sizes depending on configuration. The replacement chart covers vehicle production spanning 1988 to 1999 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 Mercury Tracer uses two distinct bulb types across its production years: the 9004 for the 1988-1989 and 1991-1992 model years, and the 9007 for the 1997-1999 model years.
Both the 9004 and 9007 are ANSI-standardized dual-filament halogen bulbs rated at 12 volts, meaning each bulb handles both high and low beam functions through separate filaments within a single housing.
The 9007 bulb operates at 65W on the high beam filament and 55W on the low beam filament, while the 9004 operates at 65W on the high beam filament and 45W on the low beam filament.
The 9004 uses a P29t base and the 9007 uses a PX29t base. Although these designations are similar, the base types are not identical, and the two bulbs are not interchangeable despite sharing the same high beam wattage.
Because the Mercury Tracer uses the same bulb size for both the high beam and low beam positions in every listed year, a single bulb type serves the full headlight assembly for each respective model year range.
Both bulb types conform to ANSI standards applicable in the United States and Canada, which governs their electrical ratings, base configurations, and filament output levels.