Coding plug questions...

[motorsports_3]

I have been having cluster issues, and I think it may be coding plug related.

I am pretty sure all of my coding plugs are screwed up since I changed the cludter and added a 13 button OBC.

I have an m50 swap. Which coding plug should I have in the cluster. Once I find that one, I could find the proper one for the OBC.

[AndrewBird]

Pretty sure any coding plug from a 6 cylinder car will work.

[motorsports_3]

What would be the issue if the coding plugs are off, between the OBC and cluster?

[James Crivellone]

OBC Coding plug is basically only for the MPG rate. In terms of Instrument cluster any 6 Cylinder 7K Tach plug will work.

Unless you want an 8K tach, in that case go buy an E28 M5 coding plug and start soldering

[BMWManiac]

Coding plugs make a lot of difference, as I found out. My cruise didn't work with one coding plug (from a 88 325i) but worked with mine (from a 91 325i). I couldn't get the 13 button OBC to work correctly (only time/date would work) until I found the right combination. So, I would suggest you get a coding plug for the OBC that fits the coding plug for the cluster....same year is where I'd start.