11-20-2015, 12:11 AM | #1 |
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How reliable are our brake pad wear monitors?
Just reached 40,000 miles on my late build '14 435i and when I check the brake pad life I'm told that I have 70,000 miles left for front brake pads and 80,000 miles left for rear. Is this normal for the Msport brake pads or might something be wrong with the monitors? When the car was new it stated that I had 80K front and rear..Hard to believe that virtually none of the brake pads have been used with 40K miles of relatively hard driving.
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11-20-2015, 01:54 AM | #2 | |
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11-20-2015, 06:14 AM | #3 |
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Don't worry so much about the mileage, they do work.
Its a two stage system, here is how it works to the best of my knowledge: The pad wear sensor goes into the caliper and wears away along with the rest of the brake pad, inside the sensor are two metal connections that get made when the sensor material wears away enough, allowing them to make contact. When the first one goes off thats sorta of like an initial warning, when the the second one trips that means you are actually close to needing new pads.
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11-20-2015, 07:17 AM | #4 | |
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11-20-2015, 08:24 AM | #6 |
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People tend to overestimate their brake pad use.
Do a visual inspection, it's pretty damn easy. If the pad material is thicker than the backing plate, you're good. If it's less than the thicknes of the backing plate, do some more research and investigating. The E92 M3 I just did, the sensors where on the pads, not the calipers as smithf32 said. |
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11-20-2015, 08:31 AM | #7 | |
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11-20-2015, 08:40 AM | #8 | |
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11-20-2015, 08:55 AM | #9 |
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Yup, the sensor has a needle like trigger that is in your brake pads. First warning (yellow) is that you'll need them replace...2nd warning (red), you pads are done and needs replace asap
And for the idrive system, its just a guessimate and those are never accurate |
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11-20-2015, 11:25 AM | #10 |
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Ah right, I knew something sounded backwards about that. 7am answers haha.
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07-13-2023, 01:37 PM | #11 |
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I’ve got the red warning but I don’t have appointment before the end of the month, after you received the red warning. Can I drive another 1000km, what are the consequences with late replacement?
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07-13-2023, 04:32 PM | #12 | ||
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07-13-2023, 05:34 PM | #13 | |
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I am getting the red so I am inclined to believe that is stage 2. I made an appoint when I got the first warning but due to holidays they didn’t have time before the end of this month. Having one trip planned which is about 1000km. |
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07-13-2023, 05:43 PM | #14 | |
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Some models have 2 (Two) stage sensors. They have two data points at about 6mm and 4mm. My understanding either sensor type is indicated to trigger at about 4mm with a 3.7mm minimum. |
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07-14-2023, 02:24 AM | #15 | |
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Then I will survive most probably the end of the month and will try to drive more strategic in traffic and use the gear flippers I retrofitted in April If not, I probably will have them to replace the rotors aswell. |
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