'02 M5 instrument cluster in '04 X5

[hbrezzi]

Hello guys,

I bought a used M5 instrument cluster to replace my ´04 X5´s that had dead pixels... The M5 cluster was supposed to work just fine, as I have read in other posts, but this one just doesn't...

1. Red RPM lights always on
2. Fuel indicator very erratic
3. Gear indicator does not work
4. DSC light always on
5. Original OBD module does not function at all... it only displays the time and radio station... No other functions
6. Service indicator does not work
7. It seems that the speedometer shows less than actual speed.

I put the old one back in and the OBD started working again.

Is the "new" cluster simply not compatible or is there anything else I should do to make it work?

Thanks in advance for any ideas!