When looking for a used Infiniti Q50, it’s important to be aware of common issues that tend to appear in specific model years, primarily affecting the steering, transmission, and electrical systems. The 2016-2018 model years, in particular, are frequently associated with a higher incidence of problems like rough shifting, rapid brake wear, and infotainment system glitches. While the Q50 offers a compelling blend of sportiness and luxury, understanding these potential pitfalls can help you make a more informed purchase decision and avoid costly repairs.

Pinpointing Problematic Q50 Model Years

The Infiniti Q50, especially in its earlier generations, has shown patterns of recurring issues that can impact its long-term reliability and ownership experience. Identifying these trends is key to navigating the used market.

2014-2015: First-Generation Concerns

The initial production years of the Q50, which debuted for the 2014 model year, saw several notable issues. A significant concern was the Direct Adaptive Steering (DAS) system, which could lead to a disconnected steering feel or unpredictable responses. Owners also reported issues with the 7-speed automatic transmission, often characterized by rough shifts and hesitation. Electrical problems, including glitches within the infotainment system and various sensor malfunctions, were also present.

2016-2018: A Cluster of Common Complaints

These model years are frequently cited as having a concentrated number of recurring problems. The DAS system continued to be a source of owner dissatisfaction, with some experiencing complete system failures. The 7-speed automatic transmission became a more prominent area of concern, with reports of harsh shifts, delayed engagement, and in some cases, premature failure. Accelerated brake wear was another common complaint, leading to the need for earlier-than-expected brake replacements. Infotainment system bugs, such as freezing screens and connectivity problems, were also prevalent during this period.

2019 and Beyond: Signs of Improved Reliability

Following the issues reported in the 2016-2018 range, Infiniti implemented revisions. Models from 2019 onwards generally demonstrate improved reliability. While no vehicle is entirely problem-free, the frequency and severity of the issues seen in earlier years appear to have diminished. Owners of these later Q50 models are less likely to encounter widespread transmission or steering system complaints.

Key Areas for Inspection on Any Q50

Regardless of the specific model year, certain components are more prone to problems and require careful inspection, whether you’re buying used or troubleshooting a current vehicle.

Direct Adaptive Steering (DAS) System

The DAS system, a steer-by-wire technology, has been a notable weak point for the Q50. Symptoms of a failing DAS system can include a loss of power steering assist, a feeling of vagueness or disconnect from the road, or even unexpected steering inputs. If the steering feels unusually heavy, loose, or inconsistent during a test drive, this is a significant warning sign.

Verification: A properly functioning DAS system should provide consistent and predictable steering feel across a range of speeds. If you notice any sudden changes in steering effort or a lack of feedback, it indicates a potential issue.

Transmission Performance and Longevity

The 7-speed automatic transmission in many Q50 models can be sensitive to maintenance and driving habits. Listen for any harsh shifting, clunking noises, or delayed engagement when shifting between gears or accelerating. A transmission that hesitates to engage or feels jerky during operation warrants thorough investigation by a qualified mechanic. Regular transmission fluid changes are crucial for its longevity.

Failure Mode: A common failure pattern involves the transmission not receiving timely fluid changes, leading to increased wear on internal components. This can manifest as slipping gears or a complete loss of drive. If the transmission fluid is dark and burnt-smelling, it’s a strong indicator that maintenance has been neglected.

Brake System Wear and Tear

Premature brake wear is a recurring complaint for many Q50 owners. If you notice excessive brake dust, squealing or grinding noises, or a spongy brake pedal, the brake pads and rotors may require immediate attention. This can become an expensive repair if left unaddressed.

Verification: Visually inspect the brake pads for thickness and the rotors for scoring or warping. During a test drive, ensure the brakes feel firm and responsive without any unusual noises or vibrations.

Electrical System and Infotainment Glitches

A variety of electrical issues can surface in the Q50, ranging from malfunctioning power windows and door locks to problems with the climate control system. The dual-screen infotainment system can also be a source of frustration, exhibiting freezing, unresponsiveness, or persistent connectivity issues.

Branching Decision: If the infotainment system freezes during a test drive, try turning the car off and on again to see if it resets. If the problem persists after a restart, it suggests a deeper software or hardware issue that may require professional diagnosis.

Essential Checks Before Purchasing a Used Infiniti Q50

When evaluating a pre-owned Infiniti Q50, a comprehensive inspection focusing on these common problem areas is critical.

• Thorough Test Drive: Pay close attention to the steering feel and transmission shifts. Drive in various conditions, including city streets and highways, to expose any potential issues. Listen for unusual noises from the engine, suspension, and exhaust.
• Review Maintenance Records: A vehicle with a consistent and complete maintenance history is generally more reliable. Look for evidence of regular oil changes, transmission fluid flushes, and any brake service.
• Inspect for Fluid Leaks: Examine the ground beneath the vehicle for any signs of fluid leaks, particularly around the engine, transmission, and cooling system.
• Verify Steering System Operation: Ensure the steering feels consistent and responsive. If possible, have a mechanic specifically inspect the DAS system for any signs of wear or malfunction.
• Examine Brake Components: Visually inspect the brake pads for thickness and the rotors for any signs of damage or excessive wear.

If significant issues are discovered during your inspection, especially concerning the steering or transmission, it may be wise to consider a different vehicle or factor in the estimated cost of potential repairs. For persistent or complex problems with your Q50, consulting a qualified Infiniti technician is always recommended.