The Volvo S80 side marker utilizes a bulb size of 12961 for the lighting components. Data for the specific bulb requirements covers the range from 2007 to 2016.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The front side marker position on the Volvo S80 uses the 12961 bulb size across the 2007-2016 model years.
The rear side marker position on the Volvo S80 uses the 12961 bulb size for the 2007-2016 model years, as well as for 2005 and 2006.
The rear side marker for the 2004 Volvo S80 uses the 12821 bulb size rather than the 12961 found in later model years.
Both the 12961 and 12821 are Philips part numbers designating miniature wedge bulbs of the T10 type, operating at 12 volts and 5 watts.
The T10 designation refers to a tubular bulb with a nominal width of 10 millimeters, a form factor widely used in low-current automotive marker and courtesy lighting applications.
Both bulbs share the W2.1x9.5d base type, which is the standard wedge base used across T10 miniature bulbs, meaning the socket interface is physically identical between the two part numbers.
Despite sharing the same base type, voltage, wattage, and physical form factor, the 12961 and 12821 carry distinct Philips part numbers, indicating they are catalogued as separate products and should not be assumed to be interchangeable without verification.
The 5-watt rating of both bulb types places them in the low-wattage category typical of side marker applications, where the primary function is visibility rather than illumination.