Ford has registered the "Mach 4" trademark, fueling rumors about a four-door Mustang. Is a new era for the iconic pony car on the horizon?

A four-door Mustang coupe appears to be closer than ever to becoming a reality, because as of Tuesday, as Ford has officially filed to trademark the name “Mach 4” for a motor vehicle.

Is Ford really considering rolling out a four-door Mustang? A trademark filed with the USPTO seems to hint at its arrival

The company recently filed to trademark the ‘Mach 4’ name in the United States. Last year, Ford reportedly showed dealers a sketch of a possible four-door Mustang. The idea of an extended Mustang lineup isn’t exactly a groundbreaking concept.

And the Mustang sedan wasn’t the only eye-popping vehicle previewed, according to anonymous dealers in attendance.

We’ve come close to seeing a Ford Mustang sedan several times in the model’s history, but the project has never materialized. While nothing is official yet, Ford recently added fuel to the four-door bonfire by trademarking the Mach 4 name.

A Mustang sedan has long been rumored to be in the cards, with Ford even building a concept version during the car's early years. It's unclear whether the four-door Mustang — wh