Speedo miles out, mileometer not working, temp gauge iffy

Hi. My speedo is way way out. Says I am doing 95mph when clearly I am not
Also the tacho or mileometer do not work and the temp gauge is up and down. Any idea what it could be..other than fubared?

sounds like the speedo needs to be replaced, you can swap that on its own if you want to keep the cluster. temp gauge could be dash fault, wiring fault or sensor fault