The Best Years For Infiniti M56 And Some To Avoid

The Infiniti M56, a mid-size luxury sedan produced from 2011 to 2013, offered a compelling blend of performance, luxury, and technology. Choosing the right model year is crucial to ensuring a reliable and enjoyable ownership experience. This guide will delve into the best and worst years of the Infiniti M56, providing a detailed overview of common issues, reliability ratings, and overall value proposition.

Infiniti M56 Model Years: A Quick Overview

Detailed Explanations

Introduction of the VK56VD 5.6L V8 Engine: The heart of the M56 is the VK56VD, a 5.6-liter V8 engine producing 420 horsepower and 417 lb-ft of torque. This engine delivers strong acceleration and smooth power delivery, making the M56 a joy to drive. Its direct injection system contributes to both performance and fuel efficiency.

New 7-Speed Automatic Transmission: The M56 features a 7-speed automatic transmission, which provides smooth and responsive shifts. This transmission contributes to the car's overall performance and fuel economy. However, some owners have reported occasional hesitation or rough shifting, particularly in earlier model years.

Updated Styling: The M56 received updated styling compared to its predecessor, the M45. The exterior design is sleek and modern, with a distinctive front grille and flowing lines. The interior is also well-appointed, with high-quality materials and comfortable seating.

Advanced Safety Features: The M56 came equipped with a range of advanced safety features, including anti-lock brakes, stability control, traction control, and multiple airbags. Optional features included blind-spot monitoring, lane departure warning, and adaptive cruise control.

Potential Oil Consumption Issues in Early Production Models: Some owners of 2011 and 2012 M56 models have reported excessive oil consumption. This issue can be caused by various factors, including piston ring design and valve seal wear. Regular oil level checks and timely maintenance are crucial to mitigating this problem.

Infotainment System Can Feel Dated: While the M56's infotainment system was advanced for its time, it can feel dated compared to modern systems. The navigation system may not be as accurate or user-friendly as newer systems, and the graphics may appear less sharp.

Minor Updates to Interior Trim: The 2012 M56 received minor updates to the interior trim, enhancing the overall aesthetic appeal of the cabin. These updates were subtle but contributed to a more refined and luxurious feel.

Enhanced Fuel Economy: Infiniti made some minor adjustments to the M56's engine and transmission in 2012, resulting in slightly improved fuel economy compared to the 2011 model. However, the difference is not significant.

Some Reports of Transmission Hesitation: As mentioned earlier, some owners have reported occasional hesitation or rough shifting from the 7-speed automatic transmission. This issue is more common in earlier model years and may be addressed with a software update or transmission service.

No Significant Changes from 2012: The 2013 M56 remained largely unchanged from the 2012 model year. This means that it shares the same strengths and weaknesses as its predecessor.

Last Year of the M56 Production: 2013 was the final year of production for the Infiniti M56. It was replaced by the Q70 in 2014.

Parts Availability Might Become a Concern in the Future: As the M56 ages, parts availability may become a concern. While common parts are generally readily available, some less common or model-specific parts may be more difficult to find.

Best Years: A Detailed Recommendation

While all three model years (2011-2013) of the Infiniti M56 offer a compelling package, the 2013 model year generally represents the best choice for most buyers. Here's why:

• Refinement: Although changes were minimal, the 2013 model benefited from any small refinements or improvements made over the previous two years.
• Later Production: A 2013 model is inherently newer, potentially having lower mileage and less wear and tear compared to earlier models.
• Potential for Resolved Issues: While the oil consumption issue could still be present, it's more likely that a 2013 model has either had the issue addressed by a previous owner or is less prone to it due to later production revisions.

The 2012 model year is a close second. It offers similar benefits to the 2013 model, with only minor differences. The 2011 model year is still a good choice, but it's important to be especially vigilant about the potential oil consumption issue and thoroughly inspect the car before purchasing.

Years to Be Cautious Of: The 2011 Model

While not necessarily a "bad" year, the 2011 Infiniti M56 requires extra scrutiny due to the higher likelihood of oil consumption issues. Before purchasing a 2011 M56, it is crucial to:

• Thoroughly inspect the engine for any signs of oil leaks or excessive oil consumption. This includes checking the oil level regularly and monitoring for any unusual exhaust smoke.
• Obtain a pre-purchase inspection from a qualified mechanic. A mechanic can identify any potential issues, including oil consumption problems, before you commit to buying the car.
• Review the car's maintenance history. Look for evidence of regular oil changes and any repairs related to oil consumption.

If you are comfortable with the potential for oil consumption and are willing to address it if necessary, a well-maintained 2011 M56 can still be a good value. However, be prepared for the possibility of needing to add oil between changes or even needing to perform more extensive repairs.

Common Problems and How to Address Them

1. Oil Consumption: As mentioned, this is a prevalent issue, particularly in 2011 and 2012 models.

• Solution: Regularly check the oil level and add oil as needed. Consider using a thicker oil or a high-mileage oil to reduce consumption. In severe cases, piston ring replacement may be necessary.

2. Transmission Hesitation: Some owners have reported hesitation or rough shifting from the 7-speed automatic transmission.

• Solution: Check the transmission fluid level and condition. A transmission fluid flush and filter replacement may resolve the issue. In some cases, a software update from the dealer may be necessary.

3. Infotainment System Issues: The infotainment system can sometimes be buggy or unresponsive.

• Solution: Try resetting the system by disconnecting the battery for a few minutes. Check for any available software updates. In some cases, the head unit may need to be replaced.

4. Suspension Issues: The suspension components, such as shocks and struts, can wear out over time, leading to a rough ride.

• Solution: Inspect the suspension components for any signs of wear or damage. Replace worn-out shocks, struts, or bushings as needed.

5. Electrical Problems: The M56 can experience various electrical problems, such as issues with the power windows, door locks, or lighting.

• Solution: Check the fuses and relays. Use a diagnostic scanner to identify any error codes. Inspect the wiring harness for any damage.

Maintenance Considerations

The Infiniti M56 requires regular maintenance to ensure its reliability and longevity. Key maintenance items include:

• Regular oil changes: Every 5,000 to 7,500 miles, depending on driving conditions.
• Transmission fluid flush: Every 60,000 miles.
• Coolant flush: Every 30,000 miles.
• Brake fluid flush: Every 2 years.
• Spark plug replacement: Every 100,000 miles.
• Air filter replacement: Every 12,000 miles.

Following the recommended maintenance schedule is crucial to preventing major problems and keeping your M56 running smoothly.

Frequently Asked Questions

Which year of the Infiniti M56 is the most reliable? The 2013 model year is generally considered the most reliable due to its later production date and potential for resolved early issues.

Is the Infiniti M56 expensive to maintain? Maintenance costs can be higher than average due to its luxury status and complex components, but regular upkeep can prevent major issues.

Does the Infiniti M56 have oil consumption issues? Yes, some 2011 and 2012 models have been reported to have excessive oil consumption, requiring careful monitoring.

Is the Infiniti M56 a good car to buy used? Yes, if you find one in good condition with a solid maintenance history, the M56 offers a powerful engine and luxurious features for its price point.

What is the fuel economy like on the Infiniti M56? Expect around 16 MPG in the city and 25 MPG on the highway, depending on driving habits and road conditions.

Conclusion

Choosing the right year of the Infiniti M56 can significantly impact your ownership experience. While the 2013 model year offers the best combination of refinement and potential reliability, the 2012 is a close second. The 2011 model requires extra caution due to potential oil consumption issues. By carefully considering these factors and conducting a thorough inspection before purchasing, you can find an M56 that provides years of driving enjoyment.