01-19-2020, 10:40 AM | #1 |
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Brake wear sensor
Hi all,
I noticed today (correct me when I'm wrong) that Idrive 7 doesn't show the state of the brakes. In my 1-series you can see when the brakes need replacement (shows remaining kms)... In my Z4 you can see when the brake-oil needs replacement and other service info but that's all... |
01-23-2020, 01:26 AM | #2 | |
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kv198034.50 Stevej231682.00 |
01-29-2020, 11:24 AM | #3 | |
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Garage List 2006 BMW Z4 M Roadster [8.81]
2016 BMW M4 Coupe ( ... [10.00] 2018 BMW M3 (Euro D ... [0.00] 2011 BMW 335is Coup ... [10.00] |
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Here's what happens though when you let the brake pads wear down enough to grind down the sensor and trip the the sensor circuit: I track my M4 and I use Pagid brakes pads for the track, which I swap back and forth with my stock pads for the street. I've gone through two sets of front pads, but the rear track pads have lasted for 3.5 years of occasional track usage. They were getting pretty thin though and I was planning to replace the entire set after the next track weekend. Long story short, on day 2 of a 3-day track weekend, I wore through the rear brake sensor and it tripped the brake warning, which was prominently displayed on the dash and in iDrive for the rest of the weekend and all the way home. I had to OK the message every time I started the car. I got home, swapped the track pads back to the street pads, replaced the rear brake sensor, reset the estimated mileage indicator and everything was fine. A couple of days later I get a text from my dealer indicating that my brakes needed replacement and to schedule the service. I replied, explaining the situation, and basically said, no worries. Then I got an e-mail and then a phone call. According to the woman who called, when the brake sensor tripped, the car sent a service request to the dealer for brake service. Since it was brakes, they were adamant that I had to come in for service. I explained to her that I was at the track, the rear track pads wore down, tripped the sensor, but were fine until I got home. I told them that I swapped in the stock pads, replaced and reset the sensor, and everything was fine. She seemed satisfied with that explanation, said that she would make a note that the brakes had been replaced and I haven't heard from them since. If the brake sensor gets tripped, the service for the brakes will now include the cost of a new brake sensor, about $25 for the rear sensor on the M4, about $40 for the front, plus probably about 0.5 - 1.0 hrs of billable shop time to replace the sensor. With the estimated range, people will at least know when their brakes need to be checked, rather than be faced with an immediate brake replacement. P.S. I just noticed that you have BMW Master Technician listed under your username, so you already know all of this!
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The Coupe: 2016 M4 | Sakhir Orange | Black Full Merino Leather | CF Trim | M-DCT | More | ED 5/13/16
The Sedan: 2018 M3 | San Marino Blue | Black Full Merino Leather | CF Trim | M-DCT | ZCP | ED 7/18/18 The Roadster: 2006 Z4 | Interlagos Blue | Black Extended Nappa Leather | Carbon Leather Trim | Purchased 7/19/12 |
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01-29-2020, 01:05 PM | #4 | ||
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It's better to just do the brakes when the brakes are due from the pad sensor being cut. When the pad sensor is cut it you could still go a couple thousand so it's not an emergency to get them replaced instantly. |
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01-29-2020, 01:18 PM | #5 | |
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Drives: M4 Coupe | M3 | Z4M Roadster
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Garage List 2006 BMW Z4 M Roadster [8.81]
2016 BMW M4 Coupe ( ... [10.00] 2018 BMW M3 (Euro D ... [0.00] 2011 BMW 335is Coup ... [10.00] |
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M3 production was done last October and M4 production is done in June this year.
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The Coupe: 2016 M4 | Sakhir Orange | Black Full Merino Leather | CF Trim | M-DCT | More | ED 5/13/16
The Sedan: 2018 M3 | San Marino Blue | Black Full Merino Leather | CF Trim | M-DCT | ZCP | ED 7/18/18 The Roadster: 2006 Z4 | Interlagos Blue | Black Extended Nappa Leather | Carbon Leather Trim | Purchased 7/19/12 |
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