Explore Toyota 4 Runner Ignition plug. Find Toyota 4 Runner Ignition Coil price. Browse Toyota 4 Runner Ignition plug wires & Toyota 4 Runner Ignition Coil Wire. Maintaining your Toyota 4Runner's spark plugs is crucial for optimal performance and fuel efficiency. To ensure longevity, regularly check for signs of wear such as difficulty starting, engine misfires, or poor fuel economy, which may indicate the need for replacement. Opt for high-quality materials like iridium or platinum for extended service life and improved conductivity. When choosing spark plugs, consider those specifically designed for your model to guarantee a perfect fit and hassle-free installation. By investing in premium spark plugs and adhering to a maintenance schedule, you'll keep your 4Runner running smoothly and reduce the likelihood of costly repairs.