I have an OEM oil pressure switch in the block as a coolant pressure switch. It failed. I’d never seen one of these fail before. I pretty much thought they were bullet proof.
My coolant pressure warning lights have been acting funny for a couple months and I finally got around to looking into it tonight. I figured that the problem would be the banks of LEDs that are my warning lights. To my surprise, the problem turned out to be the OP switch. I had several spares so it’s now replaced and working fine.
It would be a bummer if someone was still depending on the OEM OP switch as their sole indicator of OP. Then one day…Boom.