The "Check brake linings" message hit the OBC, and sure the rears were goners. So, I changed the rear disks & pads, but I kept the sensor.
After that, I tried erasing the message through the traditional method (key in pos II for +/- 45 sec, engine off), but it didn't work.
Do I need a new wear sensor in order to turn this message off? I thought this message will come on, once the exposed wires in the wear sensor are touching the disk and make a "short"? Even if the wires are exposed (barely) in the sensor that triggered the message, they don't touch anything.
Also, when I insert the key in pos II, I noticed the brake warning icon, turns from yellow to red after a few seconds, and stays red.

Do I need a new wear pad sensor, or is something else messing with me?

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Stable: e92is, e46 M54B25, e83 N52, e53 N62 - sold, e39 M54B30 R.I.P.