I am changing my oil pressure 'mushroom' sensor over so want to buy a new *small* copper seal.
I bought one several months ago, and according to my records I think I used part number: 16488
I did replace several at the same time so that may not be the correct number. Anyway, I have looked on servicebox to check part numbers and I have found the number 1170 09 as a PRSS SWTCH SEAL on a diagram which shows the 'mushroom'. I don't want to get confused and order the wrong one. I initially thought that may be the larger one for the actual stop light seal (same as a sump plug washer IIRC) - yet the picture clearly showed the 'mushroom'. It's NFP, so dashed my hopes.
I wondered if anyone has ordered the smaller copper washer for the 'mushroom' pressure sender recently or could confirm the correct part number.