Nussfjord
CEx California Exclusive LR HD, 1997 face up mod.
In my case the whole rod is about 42 cm. It is a GEMS sensor, part 010-0729 that measures the water level continuously as the float moves. According to T4-wiki.de (https://www.t4-wiki.de/wiki/Geber_G33…nd_Frischwasser)) this has vw partr 701070801A. The water tank is on the left rear. The rod must provide proper ohm values so that the central electronics provide the correct response to the water level. The rod must also be able to pass through the hole in the lid of the tank, and so that the bushing becomes waterproof.