WRX Subaru - Fourth generation (2011–2016) – GJ, GP, VA

Four-door and five-door models were unveiled in 2011 at the New York International Auto Show.  Not until the 2012 model year would the generation IV Impreza debut, with Subaru's new FB engine.

US models went on sale as a 2012 model year vehicle. Early models include a choice of four-door sedan or five-door hatchback body, 2.0-liter DOHC (148 hp) engine, five-speed manual or Lineartronic CVT with paddle shifting six-speed manual mode. Trim package included base 2.0i, 2.0i Premium, and 2.0i Limited.

WRX Subaru - Third generation (2007–2014) – GE, GV, GH, GR

Subaru revealed the third generation Impreza at the New York Auto Show on 2 April 2007—both the standard naturally aspirated Impreza and turbocharged WRX versions were revealed. The 3rd generation of the high performance WRX STI debuted in October 2007. Initially, the new Impreza was offered as a five-door hatchback (designated GH), with the four-door sedan (designated GE) introduced in 2008. The wide-body variants of the hatchback and sedan are labelled GR and GV, respectively.

WRX Subaru - Second generation (2000–2007) – GD, GG

Subaru introduced the so-called "New Age" Impreza to the world market in 2001. The second generation Impreza was intended to be larger, safer, stiffer, more refined, and more responsive. For many enthusiasts, the changes in the new car made it less desirable because it was heavier and slower with less of a raw edge to it. The WRX Sedan had a 20 mm wider track than its predecessor to aid handling, while the wagon remained the same. The coupe model was no longer available.

WRX Subaru - First generation (1992–2000) – GM, GC, GF

Introduced in November 1993, the Impreza was offered in either front wheel drive (FWD) or all wheel drive (AWD) versions and as a four-door sedan/saloon or five-door station wagon/estate. In late 1995, a two-door coupe was introduced. The Impreza, like many Subaru-built cars, was equipped with a flat engine, a distinguishing Subaru characteristic. Initial engine choices included 1.6, 1.8 and 2.0-litre naturally-aspirated engines as well as the turbocharged and intercooled 2.0-litre engine.