The Mazda Navajo front side marker bulb uses a 194 size, while the rear side marker bulb uses a 3157 size. The replacement chart covers vehicle production years spanning 1991 to 1994.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mazda Navajo uses two distinct bulb types across its side marker positions: the 194 and the 3157, both conforming to ANSI standards applicable in the United States and Canada.
The 194 is a miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W. Its single-filament, low-wattage design is typical of small marker and clearance light applications.
The 3157 is a dual-filament wedge bulb in the T25 form factor, rated at 12V with a 27W/7W output. The dual-filament construction allows it to serve both a brighter and a dimmer function within a single housing.
The front side marker position on the Mazda Navajo uses the 194 bulb across the 1991-1994 model years.
The rear side marker position uses the 3157 bulb, which at 27W on its primary filament draws significantly more power than the 194 used at the front.
The rear side marker data covers the 1993-1994 model years.
The T10 and T25 designations refer to the tubular envelope sizing of each bulb, with T25 being physically larger than T10. These two bulb types are not interchangeable with each other due to differences in size, wattage, and filament count.
The dual-filament nature of the 3157 distinguishes it functionally from the single-filament 194, meaning substituting one for the other would result in incorrect electrical behavior regardless of any physical fitment considerations.