Harley-Davidson FLHTK Ultra Limited Fog Light Bulb Size

Harley-Davidson FLHTK Ultra Limited front fog light uses an 881 bulb size. The replacement chart covers 2010 to 2013 production years with corresponding bulb specifications.

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

Front Fog Light

Years	Bulb Size
2010-2013	881

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament halogen bulb with PGJ13 base. 12V, 27W.	881

Other Locations

Additional Notes

The 881 bulb is the front fog light specification for the Harley-Davidson FLHTK Ultra Limited across the 2010-2013 model years.
The 881 is a single-filament halogen bulb, meaning it serves one lighting function only and does not combine multiple circuits within a single unit.
It operates on a 12-volt electrical system at 27 watts, which places it in the lower wattage range typical of auxiliary fog lighting applications.
The 881 uses a PGJ13 base, a proprietary locating base design that physically restricts fitment to sockets engineered for that specific base type.
The 881 carries ANSI standardization applicable in both the United States and Canada, meaning the bulb conforms to a defined set of performance and dimensional criteria recognized across North American markets.
Because the PGJ13 base is not universally shared among halogen bulbs, substituting a physically similar bulb with a different base type would result in an incompatible fitment.