Browse Toyota Corolla Iridium tipped spark plugs & Toyota Corolla Platinum spark plugs Purchase Toyota Corolla Spark plugs iridium. Maintaining optimal performance in your Toyota Corolla hinges on the condition of its spark plugs, a vital component for efficient combustion. To extend their lifespan, ensure your engine is tuned and your air-fuel mixture is correct; signs such as rough idling, misfiring, or a notable decrease in fuel efficiency often signal the need for replacement. When selecting new spark plugs, choose from iridium, platinum, or copper options—iridium and platinum boast longevity and performance, while copper is a budget-friendly choice that's ideal for older Corolla models. Always opt for OEM-quality materials to guarantee compatibility and ease of installation, ensuring your Corolla runs smoothly with every ignition.