C63/C63S AMG
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Rear Brake Sensor

Old Aug 16, 2021 | 01:59 PM
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twernicke's Avatar
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C63S AMG Edition 1
Rear Brake Sensor

Hey all, has anyone experienced issues with the rear brake sensor not fitting into the slot in the pad? I installed EBC Red Stuff pads with a new sensor. But, when I went to put the caliper back in place it was obstructed by the sensor. I ground out the slot in the pad to get more space but it's still a very tight fit. Not sure if this is common or if this is an issue with the EBC pads. So far it's working but I'm concerned that the sensor will get damaged sandwiched in there.



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Old Aug 16, 2021 | 02:49 PM
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I've experienced "tight sensor fit" and, since I used EBC pads on my C63 S, I suspect it was with their pads.

FYI, the sensor is simply a closed electrical circuit (connected "wire") that's cut/broken when the sensor part that's inserted into the pad ultimately comes into contact with the rotor and is ground off. I.E., there's nothing sophisticated about it so, as long as there's a (waterproof) closed-circuit connection, it'll work.

The front EBC RP-X race pads I used (and are now for sale in the Marketplace section, since I replaced the C63 S) actually don't have a cutout for the sensor (likely because they know, as I do, that the sensor normally doesn't work when it's hit on the track ... for me, the vast majority of the time, the heat seemed to cause the sensor to melt/fuse into a closed circuit). For the RP-X pads, I just took an old sensor and shorted the wires near the connector, sealed it with heat-shrink tubing and used that. For track running, you should be checking your pads after each session, anyway.
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Old Aug 16, 2021 | 02:54 PM
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twernicke's Avatar
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C63S AMG Edition 1
Yeah that's what I figured. I was going to contact EBC to let them know but I doubt that they will do anything.
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