The Infiniti Q70 positions itself as a sophisticated entry-luxury sedan, blending athletic performance with premium comfort. For potential buyers, understanding the long-term durability and ownership costs is essential before committing to the purchase. This analysis examines the real-world reliability of the Q70, looking at common issues, maintenance schedules, and how it compares to rivals in the segment.
Overview of the Infiniti Q70 Platform
Introduced as a core model, the Q70 is based on the well-established rear-wheel-drive FM platform shared with the Nissan M35 and later the Q50. This heritage provides a solid mechanical foundation, but the specific engineering choices for the Q70 impact its reliability. The lineup has historically offered a choice between a smooth V6 engine and a turbocharged four-cylinder, paired with either a traditional automatic or a continuously variable transmission (CVT) in certain years.
Engine and Drivetrain Considerations
Reliability concerns primarily center on the powertrain options. The 3.7-liter V6 found in earlier models is generally regarded as a robust and dependable unit, capable of delivering consistent power with minimal issues when maintained properly. In contrast, the 2.0-liter turbocharged inline-four engine generates more power from a smaller displacement, which introduces additional stress on internal components. While modern engineering has improved turbo reliability, these smaller engines can be more susceptible to oil consumption issues and carbon buildup on the intake valves compared to the naturally aspirated V6.
Common Maintenance and Known Issues
Proactive maintenance is the single biggest factor in ensuring a Q70 remains reliable over high mileage. Owners should adhere strictly to the factory service schedule, which emphasizes frequent oil changes due to the turbocharger's operating temperatures. Neglecting these intervals significantly increases the risk of premature engine wear. Beyond the engine, specific components have been noted across model years.
CVT Transmission: Models equipped with the CVT, particularly from 2014 to 2018, have reported instances of hesitation, shuddering, and premature failure, which can lead to costly repairs.
Infotainment and Electricals: Some owners have experienced glitches with the touch-screen interface, Bluetooth connectivity, and occasional malfunctions with power window sensors or the liftgate auto-open feature.
Suspension Components: Wear items such as lower control arm bushings and ball joints may require replacement before the 100,000-mile mark, leading to noticeable clunks or uneven tire wear if not addressed.
Long-Term Ownership Costs and Value
Calculating the total cost of ownership reveals important insights about the Q70's reliability as an investment. Repair costs can escalate if major components like the turbocharger or transmission fail. While parts are generally available, dealership labor rates for luxury brands can make even standard repairs expensive. Comparing the depreciation curve, the Q70 tends to hold its value reasonably well in the crowded luxury sedan segment, but potential buyers must factor in the possibility of higher maintenance costs as the vehicle ages past the 60,000-mile point.
Comparing to Competitors
When stacked against German rivals like the BMW 5 Series or Mercedes-Benz E-Class, the Infiniti Q70 often presents a mixed reliability picture. While the Q70 might offer more standard features for the price, the German brands typically benefit from newer engine technologies and dealer networks that inspire greater confidence in long-term durability. Japanese competitors like the Lexus ES provide a stronger reliability reputation, prioritizing bulletproof engineering over the sportier handling dynamics that define the Q70.
