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      05-16-2013, 05:24 AM   #14
doughboy
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Drives: 2018 M2 Comp 6MT
Join Date: Jan 2009
Location: UK

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+1

The sensors wear in stages, so the car knows for a long while how the discs are wearing, probably it started wearing about 20000miles ago.

You'll see how thick a new sensor is compared to an old one.

It's not like the old system of metal-metal 'redlight' single stage warning.
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