Quick question-does the brake pad wear sensor need to be attached to the brake pad to be part of the circuit?? I am getting a sporadic light/warning message and have already replaced one of them. They seem loose in the brake pad and trying to determine how they operate. Thanks for any input.

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Dave S.
Northeast
2003 4.6is
2005 E53 4.4
2003 E39 Msport(a REAL ONE!)
1959 Fiat 600