The Mazda Protege high beam and low beam headlight bulb sizes are 9003 and 9004, representing the specific bulb dimensions required for this model. The replacement chart covers vehicle production spanning 1990 to 2003, detailing bulb size specifications across the entire range.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mazda Protege uses two bulb types across its headlight history: the 9003 and the 9004. Both are ANSI-standard dual-filament halogen bulbs rated at 12 volts, meaning each handles both high and low beam functions within a single unit rather than requiring separate bulbs for each function.
The 9003 bulb carries a P43t base and operates at 60W on high beam and 55W on low beam. The 9004 uses a narrower P29t base and operates at 65W on high beam and 45W on low beam. The differing base types mean the two bulbs are not physically interchangeable.
The Mazda Protege (1995-2003) uses the 9003 bulb for both high and low beam headlights. This single bulb type covers all headlight functions across those model years.
The 1990-1994 Protege uses the 9004 bulb for both high and low beam headlights. As with the later generation, one bulb type serves both beam functions due to the dual-filament design.
The base change from P29t (9004) to P43t (9003) between the 1994 and 1995 model years reflects a shift in socket design. A bulb with a P29t base cannot seat into a housing built for a P43t base, and vice versa.
The 9004's wattage split of 65W high and 45W low differs notably from the 9003's 60W high and 55W low. The 9003 distributes power more evenly between the two filaments, while the 9004 allocates significantly more wattage to the high beam filament.