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      07-31-2013, 07:25 PM   #4
jphughan
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Drives: 2011.75 M3 E92 6MT
Join Date: Mar 2011
Location: Austin, TX

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The sensor can be damaged by brake fluid, which can happen either when it's ejected from the reservoir during hard driving (if it was overfilled) or if some was spilled during a service. Unfortunately, this brake fluid-sensitive sensor is located directly under the brake fluid reservoir....

Happened to me too once. Now I just ask them to be extra careful about spillage and fill level during brake fluid service.
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