Use something like Bimmerlink to unlock the piston so you can unwind it. Or... you can just unbolt the parking brake motor from the side of the caliper, unwind the piston then reattach the parking brake motor.
The pistons aren't like the front calipers where they just slide in/out, they turn.
Yea, I'm not a fan of that new top. I am glad I got the last version. Also looks like the welds moved more into bubblegum territory with the new revision as well.
Took the daily M240i B58 out to Lime Rock. 4 seconds slower than my Supra but to be expected. Honestly, it was much more capable and faster than I anticipated it would be. Needs some more front negative camber and the spring rates are way soft for track use, but... NOT MY TRACK CAR. ;) . MPH...
Tuner Tools v1.1 released.
Some of you will probably very much appreciate the XML feature. ;)
https://norcalmotorsports.org/logapp/
Release notes: (Can also be found in the app by clicking on the info button in the top right)
v1.1 — April 24, 2026
Overall
- Release notes modal (this...