See Also: 2009 Infiniti M45

2009 Infiniti M45x

Change Vehicle
Not Yet Rated Write a Review
2009 Infiniti M45x
Available in 1 styles:  2009 Infiniti M45x 4dr AWD Sedan shown
Asking Price Range
Estimated MPG

14 city / 20 hwy


    Expert Reviews 2 of 2

By National
Vehicle Overview
Infiniti's midsize sport sedan comes in M35 and M45 versions, denoting the 3.5-liter V-6 and 4.5-liter V-8, respectively, that power them. The car comes in rear- and all-wheel-drive variants, the latter called M35x and M45x. This report covers the M45 and M45x; the M35 and M35x are listed separately in's Research section. Competitors to the M include the Lexus GS, BMW 5 Series and Mercedes-Benz E-Class.

New for 2009
Changes for this year's M45 and M45x are relatively few. Infiniti's Scratch Shield paint, which uses a clearcoat resin to gradually smooth over minor scratches, is new.

Infiniti promotes the M's "low, aggressive hoodline [that] flows into the anchored shoulders." The body has short overhangs and a long, 114.2-inch wheelbase. Lightweight body components include aluminum-alloy deck-lid panels, inner and outer door panels, and hood. A rear spoiler is available. The optional Sport Package adds unique exterior trimmings, though it's only available on the rear-wheel-drive M45.
  • Standard 18-inch alloy wheels
  • Standard xenon headlights
  • Standard keyless access with push-button startup
  • Sport Package adds unique bumpers, headlights and side sills, plus 19-inch wheels
  • Rear Active Steer angles rear wheels during turns to improve handling (Sport Package)

The M sedan seats five in a well-appointed interior with textured wood or aluminum trim. Interior volume, at 105.2 cubic feet (103.1 cubic feet with the Premium Package), ranks between the GS and Infiniti's less-spacious European competitors. Cabin features include:
  • Power-adjustable front seats
  • Heated and cooled front seats
  • Moonroof
  • Dual-zone automatic climate control
  • Six-speaker, six-CD stereo
  • Available eight-speaker, two-channel or 14-speaker, 5.1-channel surround-sound stereos, both by Bose
  • Available backseat DVD player
  • Available navigation system and backup camera
  • Available heated and power-reclining rear seats

Under the Hood
The M45 and M45x continue with a 4.5-liter V-8. The five-speed automatic adds a Drive-Sport mode, with higher shift points and more aggressive kickdown than regular Drive. Like last year's auto, it also employs a clutchless-manual mode.
  • V-8 engine makes 325 horsepower, 336 pounds-feet of torque
  • Five-speed automatic with Drive-Sport and clutchless-manual modes
  • Rear- or all-wheel drive

Infiniti's optional Lane Departure Prevention system applies individual antilock brakes to steer the car as necessary to keep it in its lane. The system uses a camera to recognize lane markings, and it calculates the vehicle's speed and distance from them. It can be switched off. There's also a Preview Braking option that scans the road ahead for potential obstructions, including rapidly slowing cars. In such situations, it pre-loads the brakes for sharper response and alerts the driver with an audio chime.
  • Six airbags, including dual front airbags, side-impact airbags for the front seats and side curtain airbags for both rows
  • Electronic stability system
  • Traction control
  • Active head restraints
  • Adaptive headlights that swivel several degrees to illuminate oncoming turns

    Expert Reviews 2 of 2

Featured Services for this Infiniti M45x

  • Sell your current car quickly and easily on
  • Not sure what auto repair should cost you? Use our price estimator.
  • Get help with car repair now on Visit Repair & Care

Search Inventory Near You

Calculate Monthly Payment

What will my monthly cost be?

Check Payment

Calculate Affordable Price

What is the most I can afford?

Check Price

More Calculators

Compare finance offers to decide what's right for you.

Certain specifications, prices and equipment data have been provided under license from Chrome Data Solutions ("Chrome Data"). ©2013 Chrome Data Solutions, LP. All Rights Reserved. This information is supplied for personal use only and may not be used for any commercial purpose whatsoever without the express written consent of Chrome Data. Chrome Data makes no guarantee or warranty, either expressed or implied, including without limitation any warranty of merchantability or fitness for particular purpose, with respect to the data presented here. All specifications, prices and equipment are subject to change without notice.