when things get wet like wires over time it can eat its way all the way back to the pcb and damage that but if a new speed sensor dont sort it take it to a dealer.
try removing the other end and give it a clean if still not working u need a dealer to see if it can see what's wrong and if that dont sort it new controller pcb
https://www.e-bike-vision.de/product/e-bike-vision-battery-compatible-to-bosch-active-performance/en
Frame battery
17,1 Ah / 624 Wh
3,5 kg
Frame battery
17,1 Ah / 624 Wh
3,5 kg
last time i asked said no post to uk
this fit bit watch is $hit said i lost 2kcal today:( and it did track me even tho i said no.
smart phones are the virus n making ppl thick as a oak tree.