2007 Infiniti M45 Sedan Review | Edmunds.com

2007 Infiniti M45 Sedan


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Infiniti M45 Features and Specs

Features & Specs

  • Engine 4.5 L V 8-cylinder
  • Drivetrain Rear Wheel Drive
  • Transmission 5-speed Automatic
  • Horse Power 325 hp @ 6400 rpm
  • Fuel Economy 16/21 mpg
  • Bluetooth Yes
  • Navigation No
  • Heated Seats Yes

Review of the 2007 Infiniti M45

  • Though the 2007 Infiniti M45 doesn't quite match the competition in terms of luxury and refinement, it's a winning choice for those whose priorities are oriented toward performance.

  • Safety
  • Pros

    Explosive power from a smooth V8, roomy cabin, sharp steering, responsive handling, long list of luxury features.

  • Cons

    Some mediocre interior trim, center stack controls can be a challenge to decipher.

  • What's New for 2007

    Following last year's redesign, the Infiniti M45 gets only minor tweaks for 2007. A 10-way power-adjustable passenger seat has been added…

What Others Are Saying

Customer Reviews

  Average Consumer Rating (31 total reviews)

1 of 1 people found this review helpful

Best car i've ever owned

by on
Vehicle: 2007 Infiniti M45 4dr Sedan (4.5L 8cyl 5A)

I had a Mercedes E-class prior to this and was ready for something more sporty. I'm in my 20s, and I think the E-Class is geared towards older people who just want comfort. The M45 is for people who like to drive hard and get thrills from speed and performance. I never thought a sedan would be as much fun/more fun as my BMW 330ci. Reliability is amazing and part of the reason I decided against buying another German car. The Infiniti fits my personality a lot better than the stuffy E-class.

1 of 2 people found this review helpful

Best car on the market

by on
Vehicle: 2007 Infiniti M45 4dr Sedan (4.5L 8cyl 5A)

you cannot buy a better car. has all the toys that a man could want.

2 of 2 people found this review helpful

M45 sport

by on
Vehicle: 2007 Infiniti M45 Sport 4dr Sedan (4.5L 8cyl 5A)

Purchased this car used w/27,000 miles on it. CPO Infiniti. I'm a Lexus guy and still own one but this car really opened my eyes. The ride quality is great, no issues with sport suspension. Interior is quiet as any luxury car I have ever driven. This car takes no backseat to any German luxo sedan out there.

Gas Mileage


  • 16
  • cty
  • 21
  • highway
Calculate Yearly Fuel Costs

Full 2007 Infiniti M45 Review

What's New for 2007

Following last year's redesign, the Infiniti M45 gets only minor tweaks for 2007. A 10-way power-adjustable passenger seat has been added to the standard features list, along with a compass and a HomeLink remote transmitter. The car's Technology and Journey packages have been revised, and a new Advanced Package has been added. New SAE engine rating procedures have also resulted in lower power figures for the V8, but actual performance is unaffected.


Everyone likes to witness a good metamorphosis. They impart a spirit of hope and leave us with the sense that anything is possible. As far as automotive metamorphoses go, few have been more dramatic than that exhibited by the Infiniti M45. The car began life as a wallflower; it offered lots of value for the money but was short on sex appeal and outgunned by the competition in terms of style, features and interior room. Infiniti brought the car in for some much-needed revisions, and in model-year 2006, the M made like a butterfly and spread its wings as two dazzling, all-new sedans -- the M35 and M45.

With its sculpted lines, the 2007 Infiniti M45 boasts all the requisite aesthetic upgrades that come with any good redesign, but its makeover is about more than mere appearances. The car has been endowed with a more spacious cabin, one that offers more front head- and legroom than others in its class. The M45's interior design cues are a bit busy when compared to those of competitors like the elegantly understated Lexus GS 430. But overall, the car's cabin is well-built and attractive, and we have no doubt that most folks will be more than satisfied with what it has to offer.

Without a doubt, the M45's most appealing feature is its sporty persona. The muscle-bound 4.5-liter V8 is good for 325 horsepower and 336 pound-feet of torque, and is as solid an engine as you'll find in this segment. Power delivery is explosive, low-end torque is abundant and it's smooth enough to feel at home in a sedan with a six-figure price tag. The suspension is pleasingly firm and the car feels balanced when driven aggressively. The steering is also impressively quick on the Sport model, as it comes with an active rear-steering system.

Relative to the competition, the M45 trails when it comes to refinement. Those seeking a choice with maximum polish will be happiest with a car like the Acura RL, Lexus GS 430 or Mercedes-Benz E550. But the 2007 Infiniti M45 takes top honors for being the true driver's car of its class. If you're an enthusiast, you'll find this Infiniti's bravado downright irresistible.

Body Styles, Trim Levels, and Options

The 2007 Infiniti M45 comes in two flavors: base and Sport. Standard on the base trim are 18-inch alloy wheels, a 10-way power-adjustable driver seat, Rosewood trim, leather upholstery, one-touch up-and-down power windows, dual-zone automatic climate control, an auto-dimming rearview mirror, heated outside mirrors and a 160-watt, six-speaker sound system with a six-CD changer with MP3 playback capability. The Sport trim substitutes aluminum accents for the wood ones and adds 19-inch alloys, a sport-tuned suspension, an active rear-steer system and adaptive HID headlamps.

Available packages add a navigation system, voice-recognition technology, a center-console-mounted DVD player and adaptive cruise control. (This system senses vehicles ahead and adjusts your speed to maintain a selected following distance.) Among the other extras are a lane-departure warning system and a 14-speaker Bose surround-sound audio system.

Powertrains and Performance

The rear-wheel-drive M45 is motivated by a brawny 4.5-liter V8 that's capable of 325 hp and 336 lb-ft of torque. A five-speed automatic with automanual capability and downshift rev-matching is standard. An M45 that we tested hit 60 in 5.7 seconds and completed the quarter-mile in 14.4 seconds.


The M45's suite of safety features includes ABS, stability control, front active head restraints, front seat side- and full-length side-curtain airbags. An available lane-departure warning system alerts the driver of unintended lane drifting. In IIHS crash tests, the 2007 Infiniti M45 scored a "Good" rating – the highest possible – in both frontal and side impact protection.

Interior Design and Special Features

The M45's interior is sportier than that of others in its class, with firm, heavily bolstered seats, a can't-miss-it tachometer and real aluminum (in the Sport model) trim. The car's décor isn't as streamlined and eye-pleasing as that of rivals, however. Gauges are lit in a less-than-ambient orange and the center stack controls are a bit busy. Additionally, the Infiniti name and logo are embroidered on the seats, a touch many on our staff found a bit over the top. All in all, though, the M45's cabin is pleasant and well put together, and we have no doubt that most will be more than happy to spend time in it.

Driving Impressions

The V8 engine in the 2007 Infiniti M45 provides gobs of low-end torque and smoothness. Power delivery, either out on the highway or off the line, is outstanding. Braking performance is impressive, and a firmly tuned suspension provides excellent balance in the corners. The trade-off is that the car, especially in Sport trim, can feel a bit raw around town as the suspension can be unforgiving over large road irregularities.

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