AI DamageInfiniti M56: problems, complaints, bulletins
Summary for the Infiniti M56 across 3 model years: 18 owner complaints and 0 NHTSA service bulletins, plus repair videos. Pick a year for details.
Model years
What fails most often
- 1 Powertrain 44% of all complaints
- 2 Engine 33% of all complaints
- 3 Electrical system 22% of all complaints
- 4 Fuel/propulsion system 17% of all complaints
- 5 Air bags 11% of all complaints
- 6 Steering 11% of all complaints
- 7 Electronic stability control 6% of all complaints
- 8 Seat belts 6% of all complaints
- Powertrain: 8 complaints (44% of all).
- Engine: 6 complaints (33% of all).
- Electrical system: 4 complaints (22% of all).
- Fuel/propulsion system: 3 complaints (17% of all).
- Air bags: 2 complaints (11% of all).
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 5.6 L · petrol · 8 cyl 2011–2013
- automatic, 7-speed 2011–2013
Drive: RWD, AWD
Symptoms owners describe
How many of the 18 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Powertrain | 8 | 0 | 0 |
| Engine | 6 | 0 | 0 |
| Electrical system | 4 | 0 | 0 |
| Fuel/propulsion system | 3 | 0 | 0 |
| Air bags | 2 | 0 | 0 |
| Steering | 2 | 0 | 0 |
| Electronic stability control | 1 | 0 | 0 |
| Seat belts | 1 | 0 | 0 |
| Service brakes | 1 | 0 | 0 |
| Suspension | 1 | 0 | 0 |
| Other | 2 | 0 | 0 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
Front passenger airbag occupancy sensor fails leading to inactivation of front passenger airbag. Dealership says that a repair solution is not available.
As a result, the bolt may break at the oil filter attachment point and can cause an engine oil leak. Recall 11v592000 consequence if there is an engine oil leak, the engine oil pressure would drop and the engine could seize, increasing the risk of a crash. Car
The contact stated that while making a left turn from a complete stop, the accelerator pedal was depressed but the vehicle drove 2 MPH and stalled. There were no warning lights illuminated. The contact stated that as he released the accelerator pedal and depressed it again, he was able to drive the vehicle.
Driveshaft malfunctioning is causing the vehicle to shake violently at speeds above 60 mph. My safety and others safety is put at risk when I'm accelerating above 60 mph and the vehicle begins to shake violently causing the vehicle to veering into on coming traffic or nearby lanes.
Infiniti service on [address] austin, [ZIP] refused to accept my car on march 26th because they said parts and procedure was unavailable for them to address: recall #: r20b8 description: infiniti has determined the propeller shaft design lacks sufficient fatigue strength.
Scheduled an appointment with infiniti service [address] austin [ZIP] on feb. 17 brought my car for repair, they refused to take the car in saying they don't have parts available to fix this issue.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
What to check before buying
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Fuel/propulsion system. Fuel smell, leaks, rough running, fuel-system codes.
Other models of this make
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-05.