I have a 1998 Lexus GS400 and my speedometer just stopped working.. My rpms, temp, and gas guages are still working though. I think my gs might just need some electrical work because the outside temperature always reads waaaay higher then it should be. Anyways.. I was wondering if anybody can tell me the reason for this? Should I just take my car to the dealership?? I dont have much money or time so im trying to fix this issue the cheapest way possible. Thanks in advance..