Genuine OEM Jaguar Spark Plug, part number JDE41510. This vital component is responsible for igniting the compressed air-fuel mixture within the engine's combustion chambers, initiating the power stroke. It is installed directly into the cylinder head, typically one per cylinder. Weighing approximately 0.045 kg, this spark plug is engineered for precise heat range and electrode gap. Choosing a genuine OEM spark plug guarantees the correct thermal characteristics, electrode material, and precise fitment, which are crucial for consistent engine performance, fuel efficiency, and emissions control.