I saw your post on the Facebook group. I still don't see how this could possible happen due to DSC.

1) Your spare was the correct diameter to prevent issues

2) If there was a mis-match that confused the DSC, it would simply shut itself off and give you a warning.

3) You must have been driving at high speed for a LONG time with other symptoms before the rotor simply exploded. You would feel the car pulling, you would feel firmness in the brake pedal, and if you slowed down in traffic you would smell the awful smell of burning brakes.

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