The Infiniti M35x, a luxury sedan offering a blend of performance and comfort, holds a special place in the hearts of many car enthusiasts. However, not all model years are created equal. This guide aims to provide a comprehensive overview of the best and worst years for the Infiniti M35x, helping you make an informed decision when considering purchasing one on the used car market. Understanding the reliability, common issues, and overall performance of different model years is crucial to ensuring a satisfying ownership experience.
Infiniti M35X Model Years: A Quick Overview
| Model Year | Key Features & Considerations | Potential Issues & Concerns |
|---|---|---|
| 2006 | First year of the M35x, stylish design, powerful V6 engine, good handling. | Potential for early production bugs, navigation system can feel outdated, potential for oil consumption issues. |
| 2007 | Minor improvements over 2006, refined interior. | Similar issues to 2006, potential for timing chain issues. |
| 2008 | Improved braking system, slight styling updates. | Potential for fuel sensor issues, continued concerns about timing chain. |
| 2009 | Mid-cycle refresh with updated styling, improved technology. | Some reports of transmission issues, potential for catalytic converter problems. |
| 2010 | Final year of the M35x, generally considered the most reliable. | Fewer reported issues compared to earlier years, but preventative maintenance is still crucial. |
Detailed Explanations
2006: As the inaugural year for the M35x, the 2006 model introduced a stylish and potent luxury sedan to the market. It boasted a powerful V6 engine and commendable handling capabilities. However, being a first-year model, it was susceptible to early production glitches. The navigation system, while functional for its time, now appears dated by modern standards. Furthermore, some owners have reported issues with oil consumption.
2007: The 2007 M35x offered minor enhancements over the 2006 version, with subtle refinements to the interior. Despite these improvements, it inherited many of the same potential problems as its predecessor, including the possibility of timing chain issues. Carefully inspect the vehicle's maintenance history for any signs of timing chain replacement or related repairs.
2008: The 2008 M35x saw improvements to the braking system and received slight styling updates, further enhancing its appeal. However, it continued to be plagued by potential fuel sensor issues and ongoing concerns about the timing chain. A pre-purchase inspection by a qualified mechanic is highly recommended to assess the condition of the fuel system and timing chain.
2009: The 2009 model year marked a mid-cycle refresh for the M35x, featuring updated styling and enhanced technology. While these improvements were welcome, some owners have reported transmission problems. Additionally, there have been reports of potential catalytic converter issues. Thoroughly test the transmission for smooth shifting and listen for any unusual noises from the exhaust system.
2010: The 2010 M35x represents the final year of production for this generation and is generally regarded as the most dependable. With fewer reported issues compared to earlier models, it offers a more reliable ownership experience. Nevertheless, preventative maintenance remains essential to ensure the vehicle's longevity and performance. Regular oil changes, fluid checks, and inspections are crucial.
Understanding Common Issues
Oil Consumption: Some M35x models, particularly those from earlier years, have been known to exhibit oil consumption issues. This can be caused by worn piston rings or valve stem seals. Regularly check the oil level and be prepared to add oil between changes if necessary. Ignoring this issue can lead to engine damage.
Timing Chain Issues: The VQ35DE engine in the M35x is known for potential timing chain problems. Symptoms can include a rattling noise upon startup, rough idling, and decreased performance. Addressing this issue promptly is crucial to prevent catastrophic engine failure.
Fuel Sensor Issues: Faulty fuel sensors can lead to inaccurate fuel readings, potentially causing you to run out of gas unexpectedly. If you notice erratic fuel gauge behavior, have the fuel sensors inspected and replaced if necessary.
Transmission Issues: Some 2009 models have been reported to experience transmission problems. These can range from rough shifting to complete transmission failure. A thorough inspection by a qualified mechanic is essential before purchasing a 2009 M35x.
Catalytic Converter Problems: Catalytic converter failures can result in decreased performance, poor fuel economy, and a failed emissions test. If you notice a rotten egg smell coming from the exhaust or experience a check engine light related to emissions, the catalytic converter may need to be replaced.
Key Considerations When Buying a Used M35X
When considering the purchase of a used Infiniti M35x, several factors should be taken into account:
- Vehicle History: Obtain a comprehensive vehicle history report (e.g., Carfax or AutoCheck) to check for accidents, title issues, and odometer discrepancies.
- Maintenance Records: Review the vehicle's maintenance records to assess its upkeep. Regular oil changes, fluid checks, and timely repairs are indicators of responsible ownership.
- Pre-Purchase Inspection: Have a qualified mechanic perform a thorough pre-purchase inspection to identify any potential mechanical issues. This can save you from costly repairs down the road.
- Test Drive: Conduct a thorough test drive to evaluate the vehicle's performance, handling, and overall condition. Pay attention to any unusual noises, vibrations, or warning lights.
- Compare Prices: Research the market value of similar M35x models in your area to ensure you're getting a fair price.
Maintaining Your M35X
Proper maintenance is crucial for extending the life of your Infiniti M35x. Here are some essential maintenance tasks:
- Regular Oil Changes: Change the engine oil and filter according to the manufacturer's recommendations.
- Fluid Checks: Regularly check and top off all fluids, including coolant, brake fluid, power steering fluid, and transmission fluid.
- Brake Maintenance: Inspect the brake pads and rotors regularly and replace them as needed.
- Tire Maintenance: Maintain proper tire pressure and rotate the tires regularly to ensure even wear.
- Timing Chain Inspection: Have the timing chain inspected periodically, especially on earlier models, to catch any potential issues early.
Frequently Asked Questions
Which year of the Infiniti M35x is the most reliable? The 2010 model year is generally considered the most reliable due to fewer reported issues compared to earlier years.
Are timing chain issues common in the M35x? Yes, timing chain issues are a known concern, especially in earlier models (2006-2008).
What are some common problems with the Infiniti M35x? Common problems include oil consumption, timing chain issues, fuel sensor problems, and potential transmission issues in the 2009 model.
How often should I change the oil in my M35x? Follow the manufacturer's recommendations, typically every 5,000 to 7,500 miles, or every 6 months, whichever comes first.
Should I get a pre-purchase inspection before buying a used M35x? Yes, a pre-purchase inspection by a qualified mechanic is highly recommended to identify any potential mechanical issues.
Conclusion
While all model years of the Infiniti M35x offer a blend of luxury and performance, the 2010 model generally stands out as the most reliable. However, regardless of the year you choose, a thorough pre-purchase inspection and a commitment to regular maintenance are essential for a satisfying ownership experience. Consider your budget, desired features, and tolerance for potential repairs when making your decision.