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?

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.

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.

Ford submitted a trademark application for the term 'Mach 4,' which has now gotten the internet buzzing on its meaning. Some believe that Ford could be planning some kind of Mustang four-door,

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

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

News broke last year that Ford CEO Jim Farley had revealed to the company’s dealers a four-door version of the Mustang that was tentatively called the Mach 4 and under considera