Swaping the basic overhead check panel to the one with more options

[codyb]

I have a 91 318i sedan. It just has the basic overhead check panel, pretty much does nothing.

I would really like to install the one with more options that monitors your brake lights, etc. Would the wiring harness already be in place under the headliner?

[bmwman91]

Sadly, it is not possible to install the nice check panel & have it be functional without a ton of work. The main chassis harness needs all sorts of splices, and relay boxes installed i various places. I looked pretty far into this years ago, and the easiest way (I use the word loosely) would be to pull the entire chassis harness from a 325e/i and swap that into your 318.

[DesktopDave]

+1 on that.  And you'd never have the oil level functionality either - no float on our motors.

I always thought that'd be a great place to install a charging cradle for my smartphone though, or a Garmin GPS with an external antenna.