The Mercury Marauder brake light utilizes 1157, 3157, and 2458 bulb sizes depending on the specific version of the vehicle. Available data covers the range from 1963 through 2004 for the components listed.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercury Marauder brake light specifications cover two distinct production periods: the 1963-1970 model years and a revived 2003-2004 model run.
The 1157 bulb is the most historically prevalent type in these specifications, serving the Mercury Marauder across the 1963-1970 model years for brake light duty.
The 1157 is a dual-filament bulb with a BAY15d bayonet base, operating at 12V with a 21W high filament and a 5W low filament, conforming to ANSI standards for the US and Canada.
The BAY15d bayonet base of the 1157 features offset pins, a design that prevents incorrect insertion and distinguishes it from single-filament bayonet bulbs with symmetrical pin placement.
The 2003-2004 Mercury Marauder uses the 3157 for its brake lights, a dual-filament wedge-type bulb in a T25 form factor, rated at 12V with a 27W high filament and a 7W low filament.
The 3157 and 1157 are not interchangeable despite both being dual-filament bulbs; the 3157 uses a wedge base while the 1157 uses a BAY15d bayonet base, making the socket type incompatible between the two generations of the Marauder.
The 2003-2004 Marauder also carries a Center High Mount Stop Light, which uses the 912 bulb, a single-filament wedge type in a T15 form factor rated at 12V and 12W.
The 912 is classified as a variant of the 921 bulb under ANSI standards, with the two types sharing the same T15 wedge base but differing in wattage output.
The single-filament design of the 912 reflects its dedicated stop-light function in the Center High Mount position, where variable-intensity operation is not required.
The shift from the 1157 bayonet-base bulb in the original Marauder to the 3157 wedge-base bulb in the 2003-2004 model indicates a change in socket architecture between the two production generations.