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BMW 5-Series (G30) Forum Mechanical Maintenance - Break-in, Oil, Fluids, Servicing brake pad wear senson replacement

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      06-21-2024, 08:01 AM   #1
Mike 540
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brake pad wear senson replacement

I need a piece of advice - how does the brake pad wear sensor work? Does it start indicating a problem when it touches the brake disc due to pads being worn out ? Is it ok to use the existing sensor when changing pads not because they are worn, but because of poor braking performance (too hard)?
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      06-21-2024, 09:39 PM   #2
padresu
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you can reuse brake sensor - if you manage to take it off in one piece.
I never had such luck - always brakes apart hen removing.
Brakes sensor has metal contacts hidden under plastic casing - when plastic wears out due to thin pads, contacts short on rotor surface.
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      06-22-2024, 07:31 PM   #3
430Scud
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Quote:
Originally Posted by padresu View Post
you can reuse brake sensor - if you manage to take it off in one piece.
I never had such luck - always brakes apart hen removing.
Brakes sensor has metal contacts hidden under plastic casing - when plastic wears out due to thin pads, contacts short on rotor surface.
I'm at 50/50 luck on reusing the sensor. They experience a lot of heat, and the heat causes the plastic to crumble. Since I don't want to get one after the fact (because it breaks during removal or re-installation) and delay my brake service, I just buy a new one each time...they are pretty cheap online.

Last edited by 430Scud; 07-19-2024 at 05:48 PM..
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      06-27-2024, 08:30 PM   #4
antsgame
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About £4-5 pounds on AliExpress 👍

Search for your part number on the site.
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      06-30-2024, 09:15 PM   #5
Fngtobmdubs
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Do you guys do your own brakes? It seems quite easy. What do you guys use? I have used powerstop on previous cars and they worked amazing, I've use EBC also. Just not sure what you guys are using for pads and rotors. Thanks in advance.
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      07-19-2024, 02:19 PM   #6
jrstech
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Just replaced original pads & rotors with Brembo painted rotors and EBC Red stuff with great results and much reduced brake dust.
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      07-24-2024, 08:20 AM   #7
Mike 540
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I am reusing the original pad wear sensor and it seems to work fine. It was not even crumbled and there was no problem putting it back in place.
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