Ford Focus Parking Light Bulb Size

Ford Focus parking light bulb sizes include 168NA, 3457NA, and 3357NA specifications across multiple production generations. The replacement chart covers 2008 to 2018 model years with corresponding bulb size data.

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

Bulb Size by Year Range

Years	Bulb Size
2012-2018	168NA
2011	3457NA
2010	3357NA
2008-2009	3457NA

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10), natural amber glass. 12V, 4.9W.	168NA
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.	3457NA
ANSI standard (US & Canada). Single-filament wedge bulb (T25), natural amber glass. 12V, 27W.	3357NA

Other Locations

Additional Notes

The Ford Focus uses three distinct parking light bulb types across the 2008-2018 model years: the 168NA, 3457NA, and 3357NA, all of which conform to ANSI standards applicable in the United States and Canada.
The 168NA is a T10 miniature wedge bulb rated at 12V and 4.9W. It is the parking light bulb for the Ford Focus across the 2012-2018 model years, making it the most widely used type in these specifications.
The natural amber glass of the 168NA produces a yellow-tinted output without the use of a colored lens or coating, as the tint is built into the glass envelope itself.
The 3457NA is a T25 dual-filament wedge bulb rated at 12V with a 27W primary filament and a 7W secondary filament. Its dual-filament design allows it to serve two lighting functions within a single housing.
The Ford Focus (2008 and 2009) and the 2011 model year use the 3457NA bulb for the parking light position.
The 3357NA is a T25 single-filament wedge bulb rated at 12V and 27W. It is specified for the Ford Focus in the 2010 model year only.
Although the 3357NA and 3457NA share the T25 wedge form factor and the same 27W primary filament rating, they are not functionally interchangeable. The 3457NA carries an additional 7W filament that the 3357NA does not have.
The T10 and T25 designations refer to the tubular bulb body size, with T10 being the smaller of the two. The 168NA and the 3457NA or 3357NA are physically incompatible with each other's sockets due to this size difference.
All three bulb types use the natural amber (NA) designation, which indicates that the amber color is produced by the glass itself rather than by an external amber-coated lens.
The shift from T25-based bulbs in the 2008-2011 Ford Focus to the smaller T10-based 168NA beginning in 2012 reflects a socket change in the vehicle's parking light assembly, meaning earlier and later model sockets are not compatible with each other's bulbs.