Driving a 2006 Infiniti G35 offers a blend of responsive handling and luxurious comfort that remains appealing even today. However, like any vehicle approaching nearly two decades of age, specific mechanical and electronic concerns require attention from current and prospective owners. Understanding these issues is essential for maintaining the performance and safety this sporty sedan was designed to deliver.
Common Engine and Performance Concerns
The heart of the 2006 G35 is its smooth 3.5-liter V6 engine, but this powerplant is not without its specific vulnerabilities. While generally reliable, certain components within the valvetrain and fuel system can lead to decreased performance or warning lights if not addressed. Staying ahead of these maintenance items is key to preserving the driving dynamics the car is famous for.
VVT Solenoid Failures
A frequent point of discussion among owners is the variable valve timing solenoid. These components can fail over time, causing the check engine light to illuminate and potentially leading to a rough idle or hesitation during acceleration. Replacing these solenoids proactively can prevent more extensive damage to the variable valve timing system and maintain optimal engine efficiency.
Fuel Injector and Pump Issues
Another concern centers on the fuel delivery system. Some reports indicate that fuel injectors may leak or become clogged, resulting in poor fuel economy and misfires. In more severe cases, the fuel pump itself can fail, leading to a sudden loss of power or difficulty starting the vehicle. Regular use of high-quality fuel and addressing any vapor lock symptoms early can mitigate these risks.
Electrical System and Infotainment Challenges
The 2006 model year sits at a fascinating crossroads for automotive technology, featuring advanced navigation and audio systems that were cutting edge at the time. However, the age of these systems means that owners now face the typical challenges associated with aging electronics and wiring harnesses.
Navigation Unit Malfunctions
The in-dash navigation system, a hallmark of the Infiniti experience, can present significant problems as the car ages. The touchscreen may lose responsiveness, or the unit might fail to boot up entirely due to worn capacitors or degraded solder joints. Repairing these units can be costly, making aftermarket GPS units a practical alternative for many drivers seeking modern functionality.
Wiring Harness Degradation
Beyond the high-profile infotainment system, the wiring harness throughout the vehicle can suffer from brittle insulation and cracked connectors. This degradation can lead to intermittent electrical faults, such as flickering dashboard lights, malfunctioning power windows, or erratic sensor readings. A thorough inspection of the harnesses, particularly under the dashboard and near the engine bay, is a critical step in diagnosing mysterious electrical gremlins.
Suspension and Steering Wear
The G35's chassis was engineered for a sporty driving experience, but this handling precision comes at the cost of accelerated wear on certain suspension components. Owners who frequently drive on rough roads or enjoy aggressive cornering will need to pay close attention to the condition of these parts.
Strut and Bushing Deterioration
Over the years, the front struts and associated bushings are subjected to constant stress, leading to a decline in ride quality and handling. Worn struts can cause excessive nose-diving during braking, while deteriorated bushings result in clunking noises over bumps and a vague steering feel. Replacing these components with high-quality aftermarket or OEM parts can restore the car's original firm and responsive ride.
CV Axle Vulnerability
The constant velocity (CV) axles on the 2006 G35 are another common wear item. The rubber boots protecting the CV joints can tear due to age or road debris, allowing grease to escape and contaminants to enter. A failing CV axle will produce a distinct clicking noise when turning, and if left unaddressed, it can lead to complete joint failure, leaving the vehicle stranded.
