The INFINITI FX35 side marker utilizes a specific 12961 bulb size for illumination purposes within the lighting assembly. Data for the specified component covers the range from 2009 through 2012.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The INFINITI FX35 uses two bulb sizes across its model years for side marker lighting: the 168 and the 194, both of which are miniature wedge bulbs sharing the T10 form factor and a 12-volt operating voltage.
Although the 168 and 194 share the same T10 wedge base and voltage rating, they are not electrically identical. The 168 operates at 4.9 watts, while the 194 operates at 3.78 watts, making them distinct specifications despite their physical similarities.
The 2009-2012 FX35 uses the 168 bulb for both the front and rear side markers.
The 2003-2008 FX35 uses the 194 bulb for both the front and rear side markers.
The front and rear side marker positions use the same bulb size within any given model year, meaning no cross-position variation exists between the two locations on the FX35.
Both the 168 and 194 are classified under ANSI standards applicable to the US and Canadian markets.
The T10 wedge base is a common miniature bulb format used in low-intensity automotive lighting applications such as side markers, where compact sizing and straightforward socket fitment are typical requirements.
Because the 168 and 194 share the same T10 wedge base, physical installation into the socket is possible with either bulb, which makes the wattage difference a critical factor when selecting the correct replacement for a specific model year.