Get Hyundai Elantra Spark Plugs & Best Hyundai Elantra Combustion Plugs. Explore Hyundai Elantra Ignition Plug. Browse Hyundai Elantra Ignition Plug Wires. Maintaining optimal performance in your Hyundai Elantra starts with keeping a close eye on spark plugs, as they are pivotal for engine ignition. Signs that demand their replacement include misfiring, rough idling, or difficulty starting your vehicle. Extend their lifespan by ensuring your engine is tuned and using high-quality fuel. When choosing replacement plugs, opt for iridium or platinum for durability and improved conductivity. Always select OEM-recommended plugs to guarantee compatibility and consider professional installation to ensure peak engine performance, as this simple switch can significantly boost your Elantra's efficiency and power.