Scion FR-S Side Marker Bulb Size

Additional Notes

• The Scion FR-S uses two distinct bulb sizes across its side marker positions for the 2013-2016 model years: the 194 at the front and the 168 at the rear.
• Both the 194 and 168 are ANSI-standardized bulb types recognized in the United States and Canada, meaning they conform to a defined set of electrical and physical specifications rather than being proprietary to any single manufacturer.
• Both bulbs share the T10 miniature wedge form factor, a small single-contact base that seats by friction rather than by a twist-lock or bayonet mechanism.
• Both bulbs operate on a 12-volt circuit, consistent with standard automotive electrical systems.
• Although the 194 and 168 share the same T10 wedge base, they differ in wattage. The front 194 bulb draws 3.78W, while the rear 168 bulb draws 4.9W, making the two types electrically non-equivalent despite their physical similarity.
• Because the 194 and 168 share the same T10 base, one can be physically inserted into the socket of the other. However, the wattage difference means substituting one for the other may produce incorrect brightness levels relative to the original design specification.
• The consistent use of the 194 across all four front side marker positions for 2013-2016 and the 168 across all four rear side marker positions for the same years indicates no mid-cycle change in bulb specification for the FR-S during that production span.