Own a Infiniti M56 in the Phoenix area? EZ Swap LLC repairs and maintains the Infiniti M56 for model years 2011 to 2013. Our shop at 9050 N 9th St handles everything from routine service to diagnostics and major repairs.
To help M56 owners know what to watch for, we reviewed public records from the National Highway Traffic Safety Administration (NHTSA). For these model years NHTSA has 24 owner complaints on file for the M56 and 3 safety recall campaigns. The most-reported problem areas are power train (10), engine (6), electrical system (4).
Most-Reported Infiniti M56 Problems
These problem areas come up most often in NHTSA owner complaints for the M56 (all model years combined). Complaint counts reflect reports filed, not the share of vehicles affected, so popular and older models naturally have more.
| Problem area (NHTSA component) | Complaints | Share | |
|---|---|---|---|
| Power Train | 10 | 41% | |
| Engine | 6 | 25% | |
| Electrical System | 4 | 16% | |
| Air Bags | 3 | 12% | |
| Steering | 3 | 12% | |
| Fuel/Propulsion System | 3 | 12% | |
| Suspension | 2 | 8% | |
| Service Brakes | 1 | 4% |
Power Train
10 of the 24 complaints (41%) mention the powertrain. Powertrain complaints can range from rough shifting to loss of drive. We road test, scan for stored codes and inspect fluids before recommending any repair. See our auto repair page.
Engine
6 of the 24 complaints (25%) mention the engine and cooling system. Engine and cooling complaints are best caught early in Phoenix, where heat pushes cooling systems and engine oil to their limits. We diagnose warning lights and check coolant, hoses and oil condition. See our check engine light diagnostics and oil change & maintenance pages.
Electrical System
4 of the 24 complaints (16%) mention the electrical system. Electrical problems are made worse by desert heat, which ages batteries, cables and connectors. We test the battery, starter and charging system and trace faults to the actual part. See our battery replacement and starter & alternator repair pages.
Infiniti M56 Complaints by Model Year
The M56 model years with the most NHTSA complaints on file are 2011, 2012, 2013. Older model years have had more time to collect reports, so use this table as a guide for what to inspect, not as a verdict on any one vehicle.
| Model year | Complaints on file | |
|---|---|---|
| 2011 | 18 | |
| 2012 | 4 | |
| 2013 | 2 |
Infiniti M56 Check Engine Codes
NHTSA owner complaints rarely cite specific trouble codes for the M56, so we do not have a model-specific ranking to show. These are the check engine codes we see most often on vehicles in Phoenix heat, and any of them can show up on a Infiniti.
| Code | What it means |
|---|---|
| P0420 | Catalyst efficiency below threshold (bank 1) Often a worn catalytic converter, but failing oxygen sensors or exhaust leaks can set it too. Can cause an emissions test failure. |
| P0300 | Random or multiple cylinder misfire Worn spark plugs, failing ignition coils, fuel or vacuum problems. Do not ignore a flashing check engine light. |
| P0171 | System too lean (bank 1) Often a vacuum leak, dirty MAF sensor, weak fuel delivery or a failing oxygen sensor. |
| P0455 | EVAP system large leak Missing or loose gas cap, or a disconnected or cracked vapor hose. |
| P0128 | Coolant temperature below thermostat regulating temperature Usually a thermostat stuck open. Fix it to restore efficiency and cabin heat. |
| P0442 | EVAP system small leak Loose or worn gas cap, cracked hose or purge or vent valve. |
| P0301 | Cylinder 1 misfire Commonly a bad spark plug or ignition coil on that cylinder. |
| P0401 | EGR flow insufficient Clogged EGR passages or a stuck EGR valve. |
Got a check engine light on your M56? A code is a clue, not a diagnosis, so we scan it and test the system before replacing anything. See our check engine light diagnostics.
Infiniti M56 Safety Recalls
NHTSA lists 3 recall campaigns for the M56 in these model years, most often involving power train, fuel system, gasoline. Recalls are repaired by the manufacturer at no charge to you, but each applies only to certain vehicles. Look up your VIN at nhtsa.gov/recalls.
- 2024 recall, Power Train (campaign 24V470000): Nissan North America, Inc. (INFINITI) is recalling certain 2011-2013 M56, 2012-2013 M35 Hybrid, 2014-2018 Q50, Q70 Hybrid, 2014-2019 Q70, and 2015-2019 Q70L two-wheel drive vehicles. The driveshaft can fatigue and break.
- 2020 recall, Power Train (campaign 20V755000): Nissan North America, Inc. (Nissan) is recalling certain 2011-2013 Infiniti M56, 2012-2013 M35 Hybrid, and 2014 Q70 and Q70 Hybrid vehicles.
- 2014 recall, Fuel System, Gasoline (campaign 14V683000): Nissan North America, Inc. (Nissan) is recalling certain model year 2012-2014 Nissan Juke, 2012-2013 Infiniti M56, QX56, and 2014-2015 Infiniti Q70 (V8 engine vehicles only), and QX80 vehicles.
Keeping a Infiniti M56 Reliable in Phoenix
Arizona heat is the hardest test a Infiniti will face. Batteries, belts, hoses, tires and engine oil all wear faster here, and a M56 that spends its life in stop-and-go Valley traffic needs maintenance earlier than the owner's manual's normal schedule suggests.
Our recommendation for M56 owners: follow the severe-service schedule, test the battery before every summer, inspect brakes and tires twice a year, and have any warning light diagnosed instead of ignored. If you are shopping for a used Infiniti M56, a pre-purchase inspection shows what the paperwork does not.
Infiniti M56 Services at EZ Swap LLC
Get the details on our Phoenix Infiniti M56 repair service, or choose a service below.
Auto Repair
All makes and models, from domestic trucks to imports.
Details →Check Engine Light Diagnostics
Scan, test and pinpoint the real cause.
Details →Oil Change & Maintenance
Oil, filters, fluids, tires and scheduled service.
Details →Battery Replacement
Test, replace and protect against Phoenix heat.
Details →Starter & Alternator Repair
Charging and starting system repair.
Details →Infiniti M56 FAQ
What are the most common problems with the Infiniti M56?
Based on NHTSA owner complaints, the most-reported problem areas for the Infiniti M56 are power train (10), engine (6), electrical system (4). Complaint counts reflect reports filed, not the share of vehicles affected.
Which M56 model years have the most complaints?
The M56 model years with the most NHTSA complaints on file are 2011, 2012, 2013. Older years have had longer to collect reports, so inspect any specific vehicle before buying.
What check engine codes are common on the Infiniti M56?
NHTSA complaints rarely cite specific codes for the Infiniti M56. On Phoenix vehicles in general, we see P0420, P0300 misfires, P0171 lean conditions and EVAP leaks such as P0455 and P0442 most often. Bring yours in and we will scan and test it.
Does the Infiniti M56 have any safety recalls?
NHTSA lists 3 recall campaigns for the Infiniti M56 across model years 2011 to 2013. Each recall applies only to certain vehicles, so enter your VIN at nhtsa.gov/recalls to see if yours is affected.
Do you repair the Infiniti M56 in Phoenix?
Yes. EZ Swap LLC repairs and maintains Infiniti vehicles including the M56, at 9050 N 9th St in Phoenix. Call or text (602) 246-9063 for an appointment.
Is a pre-purchase inspection worth it for a used Infiniti M56?
Yes. An inspection checks the engine, transmission, brakes, suspension, A/C and electrical system, and scans for stored codes, so you know the real condition before you buy.
How often should I service my Infiniti M56 in Phoenix?
Follow the severe-service schedule in your owner's manual, since heat and stop-and-go driving count as severe use. Test the battery before summer and inspect brakes and tires regularly.
More Infiniti Models We Service
Source: public complaint and recall records from the National Highway Traffic Safety Administration (nhtsa.gov). Counts reflect reports filed and do not predict the condition of any individual vehicle.