Replace Infiniti Q50 Ignition Plugs Replacement. Purchase Best Infiniti Q50 Combustion Plugs & Infiniti Q50 Spark Plugs. Explore Infiniti Q50 Ignition Plug. Maintaining the spark plugs of your Infiniti Q50 is crucial for optimal performance and fuel efficiency. Signs that it's time for a replacement include misfiring, reduced acceleration, and increased fuel consumption. To extend their lifespan, ensure your engine is tuned and avoid short trips that prevent the spark plugs from reaching optimal operating temperatures. When selecting new spark plugs, consider iridium or platinum types for their longevity and superior performance. For the Infiniti Q50, always opt for OEM-recommended plugs to maintain engine integrity and remember to apply anti-seize on the threads during installation for future ease of removal. Keep your ride smooth and your ignition system in top form with the right spark plugs from our extensive online selection.