How could I replace the camshaft sensor anyway someone could explain that to me on 2002 Volkswagen Jetta

Car won't start and I've already replaced the crankshaft sensor

Asked by for the 2002 Volkswagen Jetta
The cam sensor will NOT cause a no start condition. Have you checked fuel pressure, spark or timing?
Really I was told that the camshaft sensor an crankshaft sensor would cause no start but anyway I don't know much about cars trying to learn but I can tell you when it lost all power I pulled over and the ECM light came on and it wont start back but the fuel pressure is fine an if it was the timing wouldn't the belt look messed up
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the camshaft sensor should bolt and into the valve cover on top or side