Infiniti M

Research the Infiniti M sedan

The Good

The 2012 Infiniti M is a sleek and well-designed car, with attractive styling and a powerful engine. These vehicles are well-built and provide very good value.

The Bad

The Sport packages don’t offer confident steering, and the ride can feel rather wooden. The price of an Infiniti M rises dramatically if you want the high-end trim package and options.

The Bottom Line

While the optional V8 engine does add kick, the V6 may be the best value for your money. Either way, this is a head-turning, high-performing luxury sedan.


There are four trim packages available for the 2012 Infiniti M sedan: the M37 base and all-wheel drive models, and the M56 base and all-wheel drive models. These are not to be confused with the Infiniti M coupe, which is the company’s high-performance sports car.

MSRP: $48,595 (M37 base) to $62,595 (M56 AWD)

Average paid: $47,625 to $60,950


Acceleration and power

The base M37 sedan still offers impressive power, maxing out at 330 horsepower. This compares favorably with the other vehicles in its class; by comparison, for example, this figure bests the Audi A6 base package by more than 100 horsepower. Upgrading to the M56 means that you’re swapping out the V6 for a V8, which produces an impressive 420 horsepower and 417 lb/ft of torque. Both engines offer impressive acceleration, with the M37 scooting from 0 to 60 in just under six seconds.

However, keep in mind that the V8 uses quite a bit more fuel. If saving gas is a priority for you, remember that the Infiniti M sedan is also available in a hybrid version.

Handling and braking

While the steering on the 2012 Infiniti M37 is responsive and predictable, things get a little less assured when you move up to the M56. At times, the M56’s steering feels like it’s a step or two behind the car’s power. On the whole, there is room for improvement in terms of the Infiniti M’s steering.

Power-assisted all-wheel anti-lock brakes are standard on all 2012 Infiniti M vehicles. In controlled test environments, the Infiniti M37 posted 60 to 0 deceleration distances that where slightly above average for its class. Infiniti M reviews tend to agree that the brake pedal has a taut, responsive feel.



The front bucket seats are comfortable and well-designed, offering added lumbar support, ample padding and active head restraints that help reduce the possibility of getting whiplash as the result of a rear-impact collision. Rear seats are 60/40 split bench with a retractable center armrest. Leather is the default seating material.

Power seats are a standard feature, and the front seats are 10-way adjustable. You can also program a seating orientation into the system’s memory so it can automatically adjust for different drivers.


Additional standard interior features on all trim packages include a power tilt/telescoping steering wheel with programmable memory, power windows, power locks, remote entry, cruise control, vehicle security system with immobilizer, and a 7-inch LCD vehicle master control display unit, from which you can access trip information, HVAC controls and stereo controls. The default entertainment system is a 6-speaker AM/FM stereo with CD and MP3 capability and speed-sensitive auto-adjusted volume controls.

Cargo space

The trunk measures 14.9 cubic feet, which is a slightly above-average figure. You can also collapse the rear seats if you need to add storage space inside the vehicle.


The National Highway Traffic Safety Administration gave the Infiniti M series sedans a four-star rating for overall crash safety. It also earned four stars for front crash resistance and rollover resistance, and won a top five-star rating for its rear seat safety and side-impact crash resistance.

Standard safety features include vehicle dynamic control, traction control, electronic brake force distribution, a tire pressure monitoring system and all-wheel anti-lock brakes. Dual-stage front airbags, side airbags and side-impact curtain airbags are also standard equipment on all models.


The 2011 Infiniti M sedan was totally redesigned, and the 2012 picks up where it left off, offering only a few minor variations in the standard and optional features among the various trim packages. These specifications are for the M37 base Infiniti M sedan; variations in performance among the higher-level trim packages are discussed in the sections below.

  • Transmission: 7-speed automatic
  • Drivetrain: Rear-wheel drive
  • Engine Type: V6
  • Engine Size: 3.7 L
  • Horsepower: 330 @ 7000 rpm
  • Torque: 270 @ 5200 rpm
  • MPG, City: 18 MPG (lower for V8, higher for hybrid)
  • MPG, Highway: 26 MPG (lower for V8, higher for hybrid)
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