The Iwis Camshaft Adjuster Timing Chain EA113 is an essential component used to link the cams together along with the camshaft adjuster/VCT unit. Over time, at higher mileage, these chains are known to stretch, which can lead to engine failure if not addressed. Proper functioning of the timing chain is crucial for maintaining precise timing between the engine's components, ensuring optimal performance and preventing potential damage. By replacing the timing chain with the Iwis Camshaft Adjuster Timing Chain EA113, you can address issues related to chain stretch and maintain the reliability of your engine.