Speedo problem

[xstorted2006]

Alright i'm trying to fix every little detail on my car and under the speedometer there is a miles per gallon little arm and it is stuck all the way at 40 "yeah Right" what tells the computer the miles per gallon and whats the easiest way to fix this just get a used cluster??:dunno: or replace the speedometer or can it be fixed???

[xstorted2006]

oops it's under the RPM gage duhh sorry all

[bmwrus]

Take the cluster out and make sure that all the wires in the back are connected and or wiggle them around a little see if that does it.

[bimmer dot info]

I think it gets it's signal from the OBC which gets it from the DME computer.

Are the rest of the gauges working properly? All OBC functions (including the hidden ones)?

[xstorted2006]

yes all computer and gauges work except the mpg under the rpm the obc work properlly and found out the hard way with how much miles is left till empty LOL computer was dead on

[bimmer dot info]

If the mpg under the obc works but the dash does not there could be a break in the wiring or the gauge could be bad.
I think you can change single gauges but it has been quite a while since I had mine apart and I cant really remember.

[attack eagle]

do the cluster test to see if the gauge works at all.

[xstorted2006]

how do i do the gauge test i've tried it from the link on bmwe34.com and i couldn't get it work i think my cars to old it's a 89 production of 10/88 :cry: but kinda rare since only 5% of 535's were stick in america

[bimmer dot info]

Does the right clear button work on your dash? Test it by clearing something that is displayed on the big LCD. If it does hold it down for a few seconds and turn the key to run.

[attack eagle]

if it doesn't work... then yes get a new cluster... after you take it out to see what color the plastic is.

example, mine is kind of a baby blue IIRC, so I could only use a cluster that was baby blue, and not another color.

there is more to it, but it is the easiest way to tell.