The Infiniti Q50 Didn't Exist in 2007
The premise of this topic has a factual problem. The Infiniti Q50 was not introduced until the 2014 model year. There was no 2007 Infiniti Q50, and there never will be one. The model simply did not exist at that point in the brand's history. In 2007, Infiniti's midsize premium sedan offering was the G35, which had been on sale since the 2003 model year. Nissan restructured the Infiniti line around that time, phasing out the G35 in favor of the G37 for the 2009 model year, and then replacing the entire G sedan line with the Q50 in 2014. So if you are looking at a vehicle listed as a "2007 Infiniti Q50," it is almost certainly either a mislabeled G35 or a fabricated listing.
The Infiniti Q50 2007 A Detailed Examination Of The Brands Ambitious Entry Into The Premium Midsize Sedan Segment
I have seen this confusion come up repeatedly, usually on used car forums or auction sites where listings get sloppy. Someone sees "Q50" and "2007" and assumes they go together because the name sounds right. They do not. The Q50 was Infiniti's attempt to compete with the BMW 3 Series, Mercedes C-Class, and Audi A4 using a new naming convention that shifted the brand away from alphanumeric badges entirely. The G-series was the old name, and the Q50 was the new one. Two completely different eras of the same segment. If you are actually researching what Infiniti was doing in the premium midsize sedan space in 2007, you want the G35. It came with a 3.5-liter V6 making around 280 horsepower in most trims, available in rear-wheel drive or all-wheel drive, and it was well-regarded in its class. Reliability was generally solid. The interior quality held up better than some European competitors at the time. It lost to the 3 Series in driving dynamics but beat them on outright comfort and value. If your interest is specifically the Q50, the earliest you can find one is a 2014 model. The first generation Q50 ran from 2014 through 2022, and it had its own set of issues worth knowing about before buying one. The early models had significant problems with the direct adaptive steering system, which could fail without warning and cause the steering rack to disconnect from the column. Infiniti extended the warranty on that component, but it is still the single most important thing to check on any used Q50. I once bought a 2015 Q50 that had the steering issue fixed under warranty, but the car had another unrelated problem with the coolant pump on the 3.0t twin-turbo engine that leaked within two months of purchase. You learn quickly that the Q50 is a complex car, and complexity is where these problems live.
There is no detailed examination to do of a 2007 Q50 because it does not exist. The closest accurate topic would be an examination of the 2007 Infiniti G35 as Infiniti's entry into that segment at the time, or an examination of the 2014 Infiniti Q50 as the brand's actual ambitious repositioning. Picking one of those two and digging into it properly will give you something real to work with.
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