The Ford Freestyle front turn signal requires a 3157NA bulb size, while rear turn signal applications use either 4057 or 3157 bulb sizes. The replacement chart covers 2005 through 2007 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Freestyle uses three bulb types across its front and rear turn signal positions for the 2005-2007 model years: 3157NA, 4057, and 3157.
All three bulb types share the same T25 wedge form factor, dual-filament design, and 12V electrical rating, with a power draw of 27W on the high filament and 7W on the low filament.
All three types conform to ANSI standards applicable in both the United States and Canada.
The 3157NA is the sole bulb specified for the front turn signal position across all three model years (2005-2007).
The "NA" suffix on the 3157NA denotes a natural amber glass envelope, which produces an amber light output without relying on a colored lens to filter a clear bulb.
The rear turn signal on the 2006-2007 Ford Freestyle uses the 4057, while the 2005 model year uses the 3157 in that same position.
Although the 3157 and 4057 share identical electrical ratings and the same T25 wedge base, they are listed as distinct part numbers and are specified separately by model year for the rear turn signal position.
The 3157NA used at the front differs from the standard 3157 used at the rear in the 2005 model year specifically in its amber glass coating, despite otherwise matching electrical and physical specifications.