ok guys well i know they say "if it aint broken why fix it?" but seeing as me VS v6 is nearing 90 000k's and basically has not had anything replaced on engine im thinking of changing some of the known problem sensors such as coolant temp, will look at O2 sensors etc but as for the CAS o have priced a Bosch on at local parts dealer for $75 or have found this one on ebay for 50...its a ac delco one , are they any good? or would the bosch one be better? V6 Holden VR VS VT VX VY Crank Shaft Angle Sensor NEW - eBay (item 260359115700 end time Feb-15-09 00:28:11 PST)
Much of a muchness id say. I personally i like acdelco, but bosh has a reputation for being reliable too. But id by the bosh one at the shop. Atleast you know it will be bosh and come in a bosh box, that one off ebay could be anything.
I personally believe it's not really a brand thing when it comes to sensors, they'll fail when they fail, each to there own but I would go with what ever you would feel comfortable in purchasing, experiance has led me to beileve that as your car get's beyond 150K the CAS typically has about a 50K life span, of course this differs from car to car...