QUALITY | 8 out of 10
Expert Quotes:
Nissan reckons the 2011 Infiniti M56 offers class-leading interior space, and we couldn't find any evidence to dispute this.
Inside Line
...A more user-friendly center stack that not only utilizes fewer buttons but also is angled more towards the driver.
Motor Trend
The M’s generous trunk and cabin are about the same size as in last year’s model, but the cabin is more elegant than ever.
Automobile
...Some of the plastics and rubbery compounds used elsewhere in the cabin aren't. For instance, there's a long strip of aluminum-look plastic inlaid into the fancy pants wood that kinda screams "Not quite."
Autoblog
The door panels are punctuated by elegant teardrop-shaped sculptures of metalized plastic, and genuine ash trim swabs the dash and center console in tasteful quantities.
Car and Driver
The key difference between compact sport sedans, like Infiniti's G37, and mid-sizers like the 2012 Infiniti M, is back-seat space. There's plenty of space for two adults in back in the M37 or M56--or a fifth on occasion--and the seats actually feel sculpted to the human form.
In front, it's exceptionally comfortable; both driver and front passenger get ten-way power seats, and the front cabin has good head and shoulder room, minus a little width for the thicker center console.In back, the only caveat is that the tall doors and rear deck can give the rear occupants a closed-in feel. The tallest passengers might find it a little light on headroom, but the 2011 M doesn’t sacrifice rear-seat comfort for its looks, as do the Jaguar XF.
A big trunk rounds out this package that's surprisingly practical for a sport sedan; it's useful though not all that long; otherwise there's good cabin storage, with a shallow-ish console augmented by a deep glovebox.
Ride quality is very good, although as with the somewhat smaller G37 there's a bit more road noise inside the cabin than you might expect for a sedan that emphasizes not just performance, but luxury.
The V-6 version has the noticeable, vibration-ridden feel of a modern-day Nissan, and it needs to improve. At wide-open throttle the M37 is loud and transmits a lot of unwanted shake into the steering column and floorpan that’s sure to be noticed by any buyer in the $50,000 sedan segment.
Conclusion
The 2012 Infiniti M sedans are very roomy inside, and lavishly appointed, but some noise and vibration keep the experience from being what it could be.