Infiniti's flagship is among our top-rated luxury sedans. Handling is agile and the interior is nicely finished. Performance is strong, and fuel economy has improved, even with the power increase. But the engine can sound a bit raspy when revved high. A wide variety of electronic safety technologies is available, though the features range from useful to simply annoying.
Alerts
There are 2 recalls on this vehicle. Learn More.

Road Test Results

Performance
Acceleration Acceleration Acceleration tests are conducted on a smooth, flat pavement straightaway at the track. Time, speed, and distance measurements are taken with a precise GPS-based device that’s hooked to a data-logging computer.
0 to 60 mph 0 to 60 mph (sec.) The time in seconds that a vehicle takes to reach 60 mph from a standstill with the engine idling.
Transmission Transmission Transmission performance is determined by shifting smoothness, response, shifter action, and clutch actuation for manual transmissions.
Fuel Economy Fuel Economy We perform our own fuel-economy tests, independent of the government's often-quoted EPA figures and the manufacturers' claims. Using a precise fuel-flow measuring device spliced into the fuel line, we run two separate circuits to represent city and highway consumption.
CR's Overall Mileage CR's Overall Mileage CR's overall mileage is a composite of measured fuel usage on a prescribed city course and highway cruising; and CR's 150-mile test trip of mixed driving, if tested. In recent road tests, we've discontinued the 150-mile trip test.
CR's City Mileage CR's City Mileage Measured fuel usage on a prescribed city course.
CR's Highway Mileage CR's Highway Mileage Measured fuel usage on a prescribed highway cruising.
Annual Fuel Cost Annual Fuel Cost The cost and amount of fuel used in 12,000 miles and is calculated from CR's overall mileage.
Braking Braking The braking rating is a composite of wet and dry stopping distances and pedal feel. Braking distance is from 60 mph, with no wheels locked.
Emergency Handling Emergency Handling Several factors go into the rating, including the avoidance maneuver speed and confidence, as well as how the vehicle behaves when pushed to its limit.
Comfort / Convenience
Ride Ride Our expert judgment of how well the suspension isolates and absorbs road imperfections and how steady it keeps the body on various road surfaces.
Noise Noise Our expert judgment of the vehicle's interior noise level in everyday driving.
Front Seat Comfort Front Seat Comfort Our judgment of how comfortable the front seat is for drivers of various heights.
Rear Seat Comfort Rear Seat Comfort Our judgment of how comfortable the rear seat is for two passengers to sit across.
Interior Fit and Finish Interior Fit and Finish An expert evaluation of the interior quality and craftsmanship.
Trunk/Cargo Area Trunk/Cargo Area Our rating is based on the amount of luggage or cargo space that a vehicle has in the trunk or cargo area.
Emissions
Greenhouse Gas Greenhouse Gas The Greenhouse Gas Rating represents the amount of carbon dioxide the vehicle emits compared to other vehicles of the same model year. This score from the EPA ranges from 1 (worst) to 10 (best).
NA
Smog Rating Smog Rating The Smog Rating represents the amount of health-damaging and smog-forming airborne pollutants the vehicle emits compared to other vehicles of the same model year. This score from the EPA ranges from 1 (worst) to 10 (best).
NA

Owner Reports

Worse Better
Reliability History Reliability History The reliability charts are based on responses on hundreds of thousands of vehicles from our latest Annual Auto Survey. Consumer Reports subscribers reported on any serious problems they had with their vehicles during the past 12 months that they considered serious because of cost, failure, safety, or downtime, in any of the trouble spots included in the table below. The results are presented relative to the average model that year. Extra weight is given to the more serious areas such as major engine or transmission problems. Based on this data and further analysis, we predict reliability for the latest year. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
2000
2001
2002
2003
NA
2004
NA
2005
NA
2006
2007
2008
NA
2009
NA
2010
NA
2011
2012
2013
NA
2014
2015
2016
2017
2018
2019
2020
Reliability Trouble Spots
Engine Major Engine Major Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.
NA
Engine Minor Engine Minor Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.
NA
Engine Cooling Engine Cooling Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.
NA
Transmission Major Transmission Major Transmission rebuild or replacement, torque converter, clutch replacement.
NA
Transmission Minor Transmission Minor Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.
NA
Drive System Drive System Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.
NA
Owner Satisfaction Owner Satisfaction To learn about satisfaction, CR has collected survey data from our annual survey on more than half a million vehicles. Our subscribers provide great insights into their satisfaction by answering one simple question: If they had it to do all over again, would they definitely buy or lease the same model? In addition, respondents also rate their cars in six categories: driving experience, comfort, value, styling, audio, and climate systems. N/A indicates that we did not receive a large enough sample size to provide data for a specific year. An X indicates that the vehicle was not manufactured for a specific year.
2000
2001
2002
2003
NA
2004
NA
2005
NA
2006
2007
2008
2009
NA
2010
NA
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
Driving Experience Driving Experience Includes acceleration and handling
Comfort Comfort Includes seats, climate control, noise, and ride
Value Value Did you get what you wanted relative to the price you paid?
Styling Styling How it looks inside and out
Safety Equipment
ABS and ESC standard. Side and head protection air bags standard.
Road Test

Infiniti's flagship is among our top-rated luxury sedans. Handling is agile and the interior is nicely finished. Performance is strong, and fuel economy has improved, even with the power increase. But the engine can sound a bit raspy when revved high. A wide variety of electronic safety technologies is available, though the features range from useful to simply annoying. Controls are daunting at first, but experience brings familiarity.

The hybrid model gets better fuel economy than the non-hybrid version -- and on par with some small cars -- but the hybrid system tends to be jerky and abrupt transitioning in and out of electric power. With more power, the hybrid also has quicker acceleration than the conventional version, but diminished handling and braking.

Seating
2 front, 3 rear
Drive Wheels
AWD , Rear
Warranty
Coverage varies among versions of this vehicle

In most cases, automotive warranties are based on the vehicle identification number (VIN), and the warranty will be valid regardless of ownership. The dealership can tell you exactly how much warranty is left.

Read more about extended warranties
Body Styles
sedan
Transmissions Available
  • 7-speed Automatic
Engines Available
  • 3.5-liter V6 hybrid (360 hp)
  • 3.7-liter V6 (330 hp)
  • 5.6-liter V8 (420 hp)

Owner Reported Trouble Spots

The Reliability score is based on our latest subscriber survey of 2011 Infiniti M owners. The owner comments describe problems respondents experienced with this vehicle.

In-car Electronics

CD or DVD players, radio, speakers, GPS, communication system (e.g., OnStar), display screen freezes or goes blank, phone pairing (e.g. Bluetooth), voice control commands, steering wheel controls, portable music device interface (e.g., iPod/MP3 player), backup or other camera/sensors.

What Owners Say

Backup or other camera/sensors

"The back up camera housing failed. So the camera worked some time, and some time it was just static"

Anonymous, MD (2011 Infiniti M M37 X 5.6-L V8)

"Identified problem in the wiring harness to the backup camera was replaced under warranty in just a few hours"

Ronald K., GA (2011 Infiniti M M37 3.7-L V6)
Display screen freezes up

"REPLACED UNDER WARRANTY"

Anonymous, CO (2011 Infiniti M M37 X 3.7-L V6)
Hardware replacement

"Infiniti offered a map update for $100. I bought it but it made my computer freeze up and they wouldn't pay to have it repaired. I had to buy a used unit and have it installed myself."

Anonymous, VT (2011 Infiniti M M37 X 3.7-L V6)
In-dash navigation system (GPS)

"Not user friendly or intuitive."

Anonymous, TN (2011 Infiniti M M56 5.6-L V8)
Phone pairing (e.g., Bluetooth)

"doesn't pair consistently or operate properly"

Anonymous, AB (2011 Infiniti M M37 X 3.7-L V6)
Steering wheel controls

"The automatic steering and seat adjustment fails from time to time, it a silly unnecessary system that Infinti should drop"

Anonymous, FL (2011 Infiniti M M37 3.7-L V6)

"The memory steering wheel position/seat position/outside mirror position do not retain their setting. After a week or two it slowly starts to lose it's memory a little at a time, until the position finally bottoms out"

Louis K., CA (2011 Infiniti M M37 3.7-L V6)

"The seat and steering wheel auto position control has a mind of it's own, the window's open randomly when the car is not being used"

Anonymous, FL (2011 Infiniti M M37 3.7-L V6)
Voice control commands

"she kept saying that we were in a flood zone. we had it repaired and all is fine now"

Anonymous, FL (2011 Infiniti M M37 3.7-L V6)

Brakes

Antilock system (ABS), parking brake, master cylinder, calipers, rotors, pulsation or vibration, squeaking, brake failure or wear.

What Owners Say

Normal routine brake wear

"Replaced rear pads at 45000 miles.Not problem, in fact, pretty good wear. Fronts still original"

George C., AZ (2011 Infiniti M M37 3.7-L V6)

"Noise and pulsation if I had to stop from a high speed"

Anonymous, TX (2011 Infiniti M M37 5.6-L V8)

"No problem. Normal wear. Time to replace the brakes."

Anonymous, CA (2011 Infiniti M M56 X 5.6-L V8)
Premature brake wear

"Brakes OK at routine service. 2 months later they are scraping metal and all have to be replaced"

Anonymous, AB (2011 Infiniti M M56 X 5.6-L V8)

"Required $700 brake maintenance at 37000 miles"

Anonymous, IN (2011 Infiniti M M37 X 5.6-L V8)
Pulsation or vibration

"Pulsating brakes on light to moderate braking."

Anonymous, CA (2011 Infiniti M M37 3.7-L V6)

Climate System

Blower (fan) motor, A/C compressor, condenser, evaporator, heater system, automatic climate control, refrigerant leakage, electrical failure.

What Owners Say

Automatic climate control

"failure in air distribution box. cost 3500 to repair. dealer covered 1000 of repair"

Anonymous, AL (2011 Infiniti M M37 3.7-L V6)

"The heating system on the automatic climate control did not fully heat the passenger compartment"

G R., ON (2011 Infiniti M M37 X 3.7-L V6)
Heater system

"Passanger side heater does not work"

Anonymous, SC (2011 Infiniti M M37 3.7-L V6)

"Heater stopped working in the middle of the winter"

Anonymous, MA (2011 Infiniti M M37 X 3.7-L V6)

"Passenger side heater core required replacement"

Anonymous, TN (2011 Infiniti M M37 3.7-L V6)

Fuel System

Check engine light, sensors (includes O2 or oxygen sensor), emission control devices (includes EGR), engine computer, engine computer, fuel cap, fuel gauge/sender, fuel injection system, fuel pump, fuel leaks, stalling or hesitation.

What Owners Say

Emission control devices (includes EGR)

"Exhaust manifold mounted catalytic converter failed according to the sensor. Very expensive to replace, due to its unique design."

Anonymous, TX (2011 Infiniti M M37 3.7-L V6)

"Catalytic converter failure. Very expensive unit that is bolt on unit attached near engine"

Anonymous, TX (2011 Infiniti M M37 3.7-L V6)

"did not idle properly (idled at higher than normal rpm). Dealer had to reprogram emission portion of computer"

Anonymous, VT (2011 Infiniti M M56 X 5.6-L V8)

"Warning light on dash always lighted."

Anonymous, TN (2011 Infiniti M M56 5.6-L V8)
Sensors (includes O2 or oxygen sensor)

"same comment as EGR-dealer reprogrammed emission portion of computer"

Anonymous, VT (2011 Infiniti M M56 X 5.6-L V8)

Electric System

Alternator, starter, hybrid battery and related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, distributor or rotor failure, spark plugs and wires failure.

What Owners Say

Headlights

"Left Xenon Headlight burned out"

Anonymous, CA (2011 Infiniti M M37 3.7-L V6)

"wire had shorted out so the headlights didn't work. Minor fix that was covered by Dealer. Could have been worse if it happened at night"

Anonymous, MN (2011 Infiniti M M56 X 5.6-L V8)
Keyless entry

"Dealer didn't tell me remote key had to be 10 feet from car when parked. Replaced about 5 batteries before they informed me"

Anonymous, SC (2011 Infiniti M M37 3.7-L V6)
Tire pressure monitor

"There was a board where all of the warning lights where attached to that had failed and the tire pressure monitors failed"

Kevin W., TN (2011 Infiniti M M37 X 3.7-L V6)

Suspension

Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.

What Owners Say

Power steering leaks

"Steering at low speeds became noticeably more difficult"

Anonymous, CA (2011 Infiniti M M37 3.7-L V6)

"Leaking power steering. Replaced rack and pinion. Could have done nothing and just add fluid as needed but that is not my style."

Anonymous, NJ (2011 Infiniti M M37 X 3.7-L V6)
Power steering pumps and hoses

"Same as previous description"

Anonymous, CA (2011 Infiniti M M37 3.7-L V6)
Steering linkage (includes rack and pinion)

"Steering became very heavy and inaccurate. Dealer replaced entire rack and pinion system under warranty"

Kenneth D., CA (2011 Infiniti M M37 3.7-L V6)

Paint/Trim

Paint (fading, chalking, cracking, or peeling), loose interior and exterior trim or moldings, rust.

What Owners Say

Loose interior trim or moldings

"front door weatherstripping tears. some interior surface wear starting to show."

Stephen C., CA (2011 Infiniti M M37 3.7-L V6)
Paint (fading, chalking, cracking, or peeling)

"paint on the front of the car is pealing off. I have seen other cars with the same problem."

Anonymous, CA (2011 Infiniti M M37 3.7-L V6)
Rust

"Areas that had previously been repaired were rusting again"

Paul N., VT (2011 Infiniti M M37 X 3.7-L V6)

Transmission Minor

Gear selector or linkage, leaks, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission.

What Owners Say

Rough shifting

"Downshift is very bad, it hesitates and is very slow to respond to the acceleration downshift. This is very, very dangerous. They know about this problem and do not do anything about it"

Louis K., CA (2011 Infiniti M M37 3.7-L V6)
Transmission computer

"Transmission was shifting while the car was stopped and occassionally held a gear too long leading to tires slipping under light acceleration."

Anonymous, KY (2011 Infiniti M M37 X 3.7-L V6)
Transmission sensor or solenoid

"transmission will not shift from 6 to 7 gear"

Anonymous, WA (2011 Infiniti M M37 X 3.7-L V6)

Body Integrity

Squeaks, rattles, wind noises, loose or cracked seals and/or weather-stripping, air and water leaks.

What Owners Say

Squeaks or rattles

"Intermittent rattle coming from rear axle while going over minor road imperfections"

Anonymous, FL (2011 Infiniti M M37 3.7-L V6)
Wind noise

"It's just a bit too noisy for that caliber of car."

Anonymous, (2011 Infiniti M M37 3.7-L V6)

Engine Major

Engine rebuild or replacement, cylinder head, head gasket, turbo or supercharger, timing chain or timing belt.

What Owners Say

Engine rebuild or replacement

"Engine and transmission complete replacement. Never worked properly. Car from hell"

Anonymous, ON (2011 Infiniti M M56 X 5.6-L V8)
Timing belt or chain

"Timing chain recall; covered by warranty."

Anonymous, GA (2011 Infiniti M M56 5.6-L V8)

Body Hardware

Power or manual windows, locks and latches, tailgate, hatch or trunk, doors or sliding doors, mirrors, seat controls, safety belts, sunroof, convertible top.

What Owners Say

Mirrors

"Remote drivers side mirror broken. Dealer says it would cost $1400 dollars to fix-1100 just for part. Ridiculous!!!"

Anonymous, SC (2011 Infiniti M M37 3.7-L V6)

Drive System

Driveshaft or axle, CV joint, differential, transfer case, 4WD/AWD components, driveline vibration, traction control, electronic stability control (ESC), electrical failure.

What Owners Say

Electrical failure

"The electrical system controlling the engine timing failed, stalling the car on an entrance ramp to an expressway. Dealer replaced system which was still under drive chain warranty"

Gordon B., SC (2011 Infiniti M M37 3.7-L V6)

Exhaust

Muffler, pipes, catalytic converter, exhaust manifold, leaks.

What Owners Say

Pipes

"RUST"

Dave C., NY (2011 Infiniti M M37 X 3.7-L V6)

Engine Cooling

Radiator, cooling fan, antifreeze leaks, water pump, thermostat, overheating.

Engine Minor

Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, oil leaks.

Power Equipment

Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, remote engine start, alarm or security system

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