The Mazda CX-3 side marker utilizes a 194 bulb size for illumination purposes within the lighting assembly. Data for the specified vehicle covers the range from 2018 to 2019.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 12961 is the sole bulb size listed across all model years in both the front and rear side marker positions of the Mazda CX-3.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, operating at 12 volts and 5 watts.
The T10 bulb uses a W2.1x9.5d wedge base, which is a pinless base type that relies on two wire contacts along its sides to make an electrical connection.
For the 2016-2019 CX-3, the 12961 fitment in both front and rear side marker positions is conditional on the vehicle being equipped with halogen capsule headlamps.
The 2021 CX-3 carries no headlamp-type condition against its side marker bulb listings, meaning the 12961 applies without a trim or equipment qualifier for that year.
Because the W2.1x9.5d wedge base is a standardized socket type, the T10 form factor is shared by a wide range of miniature bulbs from multiple manufacturers, though not all T10 bulbs share identical wattage or voltage ratings.
At 5 watts, the 12961 falls within the low-wattage range typical of side marker applications, where the primary function is visibility rather than illumination of a surface.