The Jeep Liberty brake light utilizes 3157 and 2458 bulb sizes for the lighting components located at the rear of the vehicle. Data for the specific bulb requirements covers the period from 2002 through 2012.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Jeep Liberty uses the 3157 bulb for brake lighting across the 2002-2012 model years.
The 3157 is a dual-filament bulb, meaning a single unit serves two brightness levels, typically one filament for the tail light function and a higher-wattage filament for the brake light function, rated at 27W and 7W respectively on a 12V circuit.
The 3157 follows the T25 wedge form factor and is classified under the ANSI standard applicable to the United States and Canada.
The center high mount stop light on the Jeep Liberty uses the 921 bulb for the 2002-2007 model years.
The 921 is a single-filament wedge bulb rated at 16W on a 12V circuit, operating under the T15 form factor and the same ANSI standard as the 3157.
Because the 3157 is a dual-filament bulb and the 921 is a single-filament bulb, the two types are not interchangeable despite both using wedge-style bases.
The T25 and T15 designations refer to the body size of each wedge bulb, with T25 being physically larger than T15, which further prevents cross-fitment between the two positions.