04-14-2015, 03:16 AM | #1 |
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Brake sensors
I bought some new pads (front & rears). BMW advised me that all the brake sensors have to be replaced following new pads installation.
Is this true? |
04-14-2015, 09:06 AM | #2 |
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Yes it is true. The old sensors will not work with the new pads. Dumb.
My sensors are no longer connected, no issues. I just keep an eye on the pads. Obviously the car won't tell me when they are worn but I swap them regularly enough to see if they are worn too far. |
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04-14-2015, 02:25 PM | #3 |
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11-04-2016, 12:54 PM | #5 |
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I know this is an old thread but I have a question relating to sensors.
I removed and reinstalled the sensors on my 135i. They just slip out of the little notch in the pads. (I just removed the sensor end from the pads, I didn't remove the sensor wire from it's connector.) One was kinda loose, it looked like it may have been missing a small bit of plastic....(?) So I just used a bit of super glue to hold it in when I reinstalled. I have no indication of any problem. There's no warning lights or anything lit up on my dash. Here's my questions: What happens to activate these sensors when the pads become worn? What kind of a warning message happens? It looks to me like the pads would have to be very badly worn in order for the sensor to actually touch anything. Does a bad / malfunctioning sensor send a warning message? (I think this is a crazy example of over-engineering and unnecessary expense. I check my pads at least once a year and I never wear them out.) (I just changed the front pads on my Acura TL and they had 108,000 km on them and were about 60% gone.) |
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11-04-2016, 06:14 PM | #6 |
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They start to wear when the pad thickness lets them contact the rotor, looks to be about the last 3-4mm of pad material. As long as the sensor is intact, you won't get a warning. My front one won't stay in place with the PFC pads I am using, so I have it secured to the strut. Like craina, I see the pads often enough that I don't need the sensor. You will have a constant warning light if you don't have an intact sensor plugged in, though.
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