This nameplate was introduced for the 2011 model year as the entry point to Infiniti’s G sedan range, giving the series a smaller-displacement alternative to the better-known six-cylinder G37. It kept the same basic rear-wheel-drive luxury-sedan formula that defined the G family, with available all-wheel drive in G25x form, but was positioned as a more accessible and efficiency-minded version of the car. The model was part of Infiniti’s broader strategy at the time to broaden the G lineup without changing its core rear-drive sport-sedan character.
For 2012, the model continued with the same general role and body style, appearing in Infiniti’s official parts and maintenance documentation as a current G-series sedan. That makes 2011 the first model year for this exact nameplate and 2012 the final one in its single continuous run. Infiniti removed the G25 from the lineup for 2013, when the G37 became the sedan’s entry model again.
Historically, the G25 is best understood as a short-lived G-series variant rather than a separate long-running model family. It existed during the final years of the “G” naming era, before Infiniti’s later move to the Q/QX naming structure. For enthusiasts, it stands out as the least powerful mainstream G sedan of its period, but also as a relatively uncommon chapter in the G-series story, bridging the older performance-luxury identity of the badge with a more mainstream, value-oriented positioning.