Toyota Prius Side Marker Bulb Size

Toyota Prius front side marker bulbs use 12961 or 168 size, while rear side marker bulbs use 12961 or 194 size for replacement. The chart covers bulb specifications across 2001 to 2022 model years.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Side Marker

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
2022	12961	12961	Check Price
2019	12961	12961	Check Price
2004-2015	12961	12961	Check Price
2001-2003	168	W5W	Check Price

Rear Side Marker

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
2022	12961	12961	Check Price
2019	12961	12961	Check Price
2009	194 (To 03/2009)	W5W	Check Price
2008	194	W5W	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961	Check Price
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W.	W5W	Check Price
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194	Check Price

Other Locations

Additional Notes

The Toyota Prius front side marker uses the 12961 bulb across 2004-2022 model years, with the exception of 2001-2003, which use the 168 bulb instead.
The 12961 is a Philips part number designation for a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W.
The 168 and 194 are ANSI standard designations recognized in the US and Canada, both fitting a T10 miniature wedge form factor but differing in wattage from the 12961.
All three bulb types across these specifications share the T10 wedge form factor, though their wattage ratings differ: the 12961 draws 5W, the 168 draws 4.9W, and the 194 draws 3.78W.
Despite sharing the same physical T10 wedge base, the 12961, 168, and 194 are not confirmed interchangeable, as each is specified for distinct model years and positions on the Toyota Prius.
The rear side marker on the 2009 Toyota Prius uses the 194 bulb only for vehicles produced up to March 2009, while the 2019 and 2022 model years use the 12961 in that same position.
The 2008 Toyota Prius rear side marker is specified for the 194 bulb, which at 3.78W carries a notably lower wattage than the 12961 used in later rear side marker applications.