Genuine OEM Hyundai Timing Chain Tensioner, part number 244102M803. This component is crucial for maintaining the correct tension on the engine's timing chain, which synchronizes the crankshaft and camshafts for precise valve operation. It ensures smooth engine running and prevents chain slack that could lead to timing errors or damage. Located within the timing chain assembly, this genuine OEM tensioner provides the exact spring force and damping characteristics needed for reliable, long-term engine performance. It weighs approximately 0.122 kg.