Welcome to the Forum.
Consider refurbishing your headlights. Many of us have had good luck with progressively finer sand paper and polishing followed by a high quality clearcoat. A search should reveal quite a few results.
There are two camshaft position sensors. The one at the front left isn't hard at all. The one at the right rear requires that you remove the AOS to access it. Might as well replace the AOS while you are there. Are you certain that the problem is not worn pads on the cam chain tensioners?
Articles from the web site owner...
Engine sensors: https://www.pelicanparts.com/techarticles/Boxster_Tech/26-FUEL-Engine_Sensors/26-FUEL-Engine_Sensors.htm
Cam Chain Tensioner: https://www.pelicanparts.com/techarticles/Boxster_Tech/16-ENGINE-Camshaft_Swap_and_Chain_Tensioner/16-ENGINE-Camshaft_Swap_and_Chain_Tensioner.htm
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I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
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