Picked up a new SGS3 a month or so ago, and wanted to try some cool apps. Came across one called Torque available on the android app stores, upon further investigation it required an OBDII to Bluetooth dongle.
So I had a new AA Green filter installed and bought the dongle and the day after, I got my first CEL 5500km into this stint with an HFC AA xpipe.
Torque is pretty easy to use, has useful logging capabilities (see pic below), can diagnose some codes. You can configure your own PID's and log and graph on the go. Had it all set up and running within a few minutes upon recieving the package.
ELM 327 BT-OBDII:
Torque:
M3 ECU apparently supports these sensors:
Naturally I was pretty blown away by this and figured I'd share it with the forum, see if anyone else might find this handy. The dongle and the app cost me $25.