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2004 INFINITI M45

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$3,075 — $9,195 USED
11
Photos
Sedan
5 Seats
20 MPG
(Combined)
Key specs of the base trim
 — 
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Overview

Is this the car for you?
(4.5) 4 reviews

The Good

  • Performance
  • Ride comfort
  • Interior space
  • Handling

The Bad

  • Throttle response
  • Uninspired styling
  • Fuel economy
  • Price
  • Slippery-surface traction

What to Know

about the 2004 INFINITI M45
  • 340-hp, 4.5-liter V-8
  • Five-speed automatic
  • Full-size dimensions
  • Premium amenities
  • RWD layout

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Our Take

from the Cars.com expert editorial team

Vehicle Overview
Introduced for the 2003 model year, the M45 full-size sedan from Nissan’s luxury division occupies a spot in both size and price just below Infiniti’s flagship Q45. Borrowed from the Q45 sedan, the M45’s 4.5-liter V-8 engine produces 340 horsepower. A five-speed-automatic transmission incorporates a manual-shift mode.

Billed by the automaker as a “luxury performance sedan,” the rear-wheel-drive M45 has a four-wheel-independent suspension. Five passengers can enjoy Sojourner leather seating surfaces, and the front occupants get sport-contoured bucket seats. Options include a DVD-based navigation system and a voice recognition system.

A full-size spare tire and tire-pressure monitor become standard for 2004, and the six-CD changer moves from the glove box to an in-dash position. Standard heated mirrors have a selectable reverse tilt-down feature.

Exterior
Even though the M45 doesn’t look dramatically different from other models in its class, Infiniti focused on its sculpted wedge shape. Mark McNabb, general manager of the Infiniti division, referred to the sedan’s “strong, integrated appearance, as if carved from one piece of stone, with strong, ‘stealthy’ lines.” The front end is low and wide and features what Infiniti calls an aggressive grille. It is characterized by its wide, black, chrome horizontal bars that flow into the headlights.

Chrome door handles and body-colored side moldings and outside mirr...
Vehicle Overview
Introduced for the 2003 model year, the M45 full-size sedan from Nissan’s luxury division occupies a spot in both size and price just below Infiniti’s flagship Q45. Borrowed from the Q45 sedan, the M45’s 4.5-liter V-8 engine produces 340 horsepower. A five-speed-automatic transmission incorporates a manual-shift mode.

Billed by the automaker as a “luxury performance sedan,” the rear-wheel-drive M45 has a four-wheel-independent suspension. Five passengers can enjoy Sojourner leather seating surfaces, and the front occupants get sport-contoured bucket seats. Options include a DVD-based navigation system and a voice recognition system.

A full-size spare tire and tire-pressure monitor become standard for 2004, and the six-CD changer moves from the glove box to an in-dash position. Standard heated mirrors have a selectable reverse tilt-down feature.

Exterior
Even though the M45 doesn’t look dramatically different from other models in its class, Infiniti focused on its sculpted wedge shape. Mark McNabb, general manager of the Infiniti division, referred to the sedan’s “strong, integrated appearance, as if carved from one piece of stone, with strong, ‘stealthy’ lines.” The front end is low and wide and features what Infiniti calls an aggressive grille. It is characterized by its wide, black, chrome horizontal bars that flow into the headlights.

Chrome door handles and body-colored side moldings and outside mirrors are installed. Clear-reflector taillights match the car’s xenon high-intensity-discharge headlights.

Riding a 110.2-inch wheelbase, the M45 measures 197.2 inches long overall, 69.7 inches wide and 57.6 inches tall. The sedan is equipped with power-vented disc brakes and speed-sensitive rack-and-pinion steering. Aluminum wheels hold P235/45R18 all-season Michelin tires, and performance tires will be available as a no-cost option.

Interior
Sojourner leather seating surfaces are provided for five occupants, and sport-contoured bucket seats are available up front. The driver gets an eight-way power adjustment, while the front passenger seat is equipped with a four-way setup. Heated and cooled front seats are optional. Bird’s-eye maple wood interior trim comes in a smoke graphite color, and the gauges are illuminated in orange.

A 225-watt Bose premium audio system uses cassettes and also has a six-CD changer. Intelligent Cruise Control uses lasers to sense vehicles ahead and then adjusts vehicle speed to maintain a selected distance. The trunk holds 13.4 cubic feet of cargo. Like other Infiniti models, the M45 is fitted with a telematics system.

Under the Hood
Like the Q45, the M45 is powered by a 4.5-liter dual-overhead-cam V-8 engine that generates 340 hp and 333 pounds-feet of torque. An electronically controlled five-speed-automatic transmission incorporates a manual-shift mode. Dual exhaust outlets are standard.

Safety
Dual-stage front airbags, front-seat side-impact airbags, and side curtain-type airbags for the front and rear passengers are standard. Antilock brakes include brake assist and electronic brake-force distribution. A standard Vehicle Dynamic Control system improves stability. The front seats have active head restraints.

Driving Impressions
A smooth, luxurious ride is the No. 1 trait in the M45, which looks and feels awfully large. But its handling is reasonably secure and tautly controlled, so you get a hint of sporty behavior along with plush road-going softness. The V-8 provides plenty of power, but responsiveness falls short of some sedans in this league. Interior space is bountiful.

 
Reported by Jim Flammang  for cars.com;
Posted on 9/26/03

Consumer Reviews

What drivers are saying

4.5
4 reviews — Read All reviews
Exterior Styling
(5.0)
Performance
(5.0)
Interior Design
(4.5)
Comfort
(4.5)
Reliability
(4.8)
Value For The Money
(4.8)
(5.0)

Everything but 3rd row

by Mr. Practical on November 2, 2017

Car delivers EVERYTHING. Comfort, style, fun and most importantly reliability. Will more than likely get another once the kiddos get older. Will miss this gem. Read full review

(5.0)

best quality car I have ever owned

by dennisthemenace from Orange County, CA on July 7, 2009

The M-45 (2004 model) is a truly awesome vehicle and it has exceeded my expectations ever since I purchased it new from a local dealer in May, 2004. The car has a very classy look to it, almost like a ... Read full review

Safety

Recalls and crash tests

Recalls

The 2004 INFINITI M45 currently has 2 recalls


Crash and Rollover Test Ratings

The 2004 INFINITI M45 has not been tested.

Latest 2004 M45 Stories

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Cars.com Car Seat Check

Certified child passenger safety technicians conduct hands-on tests of a car’s Latch system and check the vehicle’s ability to accommodate different types of car seats. The M45 received the following grades on a scale of A-F.*
* This score may not apply to all trims, especially for vehicles with multiple body styles that affect the space and design of the seating.

Warranty FAQs

What is a Bumper-to-Bumper warranty?

Often called a basic warranty or new-vehicle warranty, a bumper-to-bumper policy covers components like air conditioning, audio systems, vehicle sensors, fuel systems and major electrical components. Most policies exclude regular maintenance like fluid top offs and oil changes, but a few brands have separate free-maintenance provisions, and those that do offer them is slowly rising. Bumper-to-bumper warranties typically expire faster than powertrain warranties.

What is a Powertrain warranty?

Don't be misled a 10-year or 100,000-mile powertrain warranty doesn't promise a decade of free repairs for your car. It typically covers just the engine and transmission, along with any other moving parts that lead to the wheels, like the driveshaft and constant velocity joints. Some automakers also bundle seat belts and airbags into their powertrain warranties. With a few exceptions, powertrain warranties don't cover regular maintenance like engine tuneups and tire rotations.

What is included in Roadside Assistance?

Some automakers include roadside assistance with their bumper-to-bumper or powertrain warranties, while others have separate policies. These programs cover anything from flat-tire changes and locksmith services to jump-starts and towing. Few reimburse incidental costs like motel rooms (if you have to wait for repairs).

What other services could be included in a warranty?

Some automakers include free scheduled maintenance for items such as oil changes, air filters and tire rotations. Some include consumables including brake pads and windshield wipers; others do not. They are typically for the first couple of years of ownership of a new car.

What does CPO mean?

A certified pre-owned or CPO car has been inspected to meet minimum quality standards and typically includes some type of warranty. While dealers and third parties certify cars, the gold standard is an automaker-certified vehicle that provides a factory-backed warranty, often extending the original coverage. Vehicles must be in excellent condition and have low miles and wear to be certified, which is why off-lease vehicles feed many CPO programs.

See also the latest CPO incentives by automaker

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