The Ford Freestyle brake light requires a 4057 or 3157 bulb size depending on the specific version of the vehicle. Data for the lighting components covers the range from 2005 to 2007.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Freestyle uses two different brake bulb sizes across its production years, with the 2005 model year specifying a 3157 bulb and the 2006-2007 model years specifying a 4057 bulb for the brake light position.
Both the 4057 and 3157 are ANSI-standardized dual-filament wedge bulbs sharing the T25 form factor and identical electrical ratings of 12V with a 27W/7W filament output, where the higher wattage filament serves the brake function and the lower wattage filament serves a secondary function such as running lights.
Despite their shared physical form factor and electrical ratings, the 4057 and 3157 are not listed interchangeably across all Freestyle model years, as the specifications assign each bulb to distinct year groups.
The T25 designation on both the 4057 and 3157 refers to a tubular wedge bulb with a base width of approximately 25mm, a common format in North American automotive brake and tail light applications.
The 12961 is a Philips part number rather than an ANSI industry-standard designation, which distinguishes it from the 4057 and 3157 bulbs used elsewhere in the Freestyle's brake lighting system.
The 12961 bulb uses a W2.1x9.5d base, a miniature wedge base type where the numeric values describe the contact pin spacing and insertion depth, and it operates at 12V with a single 5W filament.
The T10 form factor of the 12961 is physically smaller than the T25 form factor of the 4057 and 3157, making the bulbs non-interchangeable with one another regardless of voltage compatibility.
The 12961 bulb is specified for the Center High Mount Stop Light position across all three Freestyle model years, 2005-2007, without variation.