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M40i brakes - design flaw uncovered
- Jim S
- Member
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- Joined: Mon Dec 26, 2016 9:59 pm
- Location: Ayrshire, Scotland
M40i brakes - design flaw uncovered
Sorry to hear that BigDave. Happened to me several times over the past three years of ownership. I am not aware of any solution and I know that 3-Series cars with MSport brakes are having exactly the same problem.
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M40i brakes - design flaw uncovered
I'm the latest (but won't be the last) victim of this issue. Drove to work this morning, halfway through, the noise appeared very loud and high pitch. Arrived at office car park and called bmw roadside assistant. They came and loose the disc to free the stone.
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- Member
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- Joined: Fri Nov 13, 2020 12:07 pm
M40i brakes - design flaw uncovered
Just been looking into this stone trapping issue, and did a bit of youtube,ing and found this video on how to swap out the brake pads on a MK5 supra, the same brakes as ours,,,
https://www.youtube.com/watch?v=wNK3Tp412Pg&t=322s
If you look closely in the vid it shows the top part of the backing plate,, and its the same as the BMW version, so obviously the answer to does the Toyota backing plate fit,, yes it most likely will, but it wont make any difference...
https://www.youtube.com/watch?v=wNK3Tp412Pg&t=322s
If you look closely in the vid it shows the top part of the backing plate,, and its the same as the BMW version, so obviously the answer to does the Toyota backing plate fit,, yes it most likely will, but it wont make any difference...
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- Lifer
- Posts: 11127
- Joined: Tue Feb 10, 2015 10:27 pm
M40i brakes - design flaw uncovered
Needs a 3D printed cover making for the top of the disc to run 40 odd degrees either side of top dead centre, but then that would invalidate the warranty on under 3yr old cars due to stupidity.....
M roady...OEM CSL’s, strut brace, Remus back boxes, ZHP
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
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- Newbie
- Posts: 5
- Joined: Fri Apr 14, 2023 11:17 am
M40i brakes - design flaw uncovered
Sat by the side of the road as I type with same issue waiting for roadside assistance….
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- Newbie
- Posts: 5
- Joined: Fri Apr 14, 2023 11:17 am
M40i brakes - design flaw uncovered
Sat by the side of the road as I type with same issue waiting for roadside assistance….
- Scubaregs
- Lifer
- Posts: 3187
- Joined: Thu Jul 01, 2021 7:36 am
M40i brakes - design flaw uncovered
Twice in a minute, that is unlucky........
Abstinence is fine, in moderation.
San Francisco red G29 30i.Kawasaki Ninja 1000sx 40th anniversary .
San Francisco red G29 30i.Kawasaki Ninja 1000sx 40th anniversary .
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- Lifer
- Posts: 11127
- Joined: Tue Feb 10, 2015 10:27 pm
M40i brakes - design flaw uncovered
Stop it.......
M roady...OEM CSL’s, strut brace, Remus back boxes, ZHP
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
MR2 MK 2
E89 35i project car...mapped 365bhp, M4 stoppers & wheels, KWV3’s, H&R front ARB, M3 front arms, strut brace Eisenmann cat back race exhaust, VRSF downpipes inbound
E89 35is
G29
- Argyll Andy
- Lifer
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- Joined: Mon Oct 21, 2019 10:16 pm
- Location: Argyll & Bute
M40i brakes - design flaw uncovered
Could this be payback time Peter?
Hopefully you’re not waiting too long. I carry a 9 inch screwdriver for such incidents, worked each time so far
G29 M40i Thundernight with Ivory interior, all option packs (here for a while, hopefully )
G29 M40i Misano Blue all option packs (Gone 26k of fun)
E89 35iS, Valencia Orange, Design Pure Traction pack (Gone)
E89 23i sDrive, Silver (Gone)
- Scubaregs
- Lifer
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- Joined: Thu Jul 01, 2021 7:36 am
M40i brakes - design flaw uncovered
You use a nine inch screwdriver on fat B'stards?Argyll Andy wrote: ↑Fri May 19, 2023 7:15 pm I carry a 9 inch screwdriver for such incidents, worked each time so far
Abstinence is fine, in moderation.
San Francisco red G29 30i.Kawasaki Ninja 1000sx 40th anniversary .
San Francisco red G29 30i.Kawasaki Ninja 1000sx 40th anniversary .
- Argyll Andy
- Lifer
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- Joined: Mon Oct 21, 2019 10:16 pm
- Location: Argyll & Bute
M40i brakes - design flaw uncovered
Ask no questions, I’ll tell you no liesScubaregs wrote: ↑Fri May 19, 2023 7:17 pmYou use a nine inch screwdriver on fat B'stards?Argyll Andy wrote: ↑Fri May 19, 2023 7:15 pm I carry a 9 inch screwdriver for such incidents, worked each time so far
G29 M40i Thundernight with Ivory interior, all option packs (here for a while, hopefully )
G29 M40i Misano Blue all option packs (Gone 26k of fun)
E89 35iS, Valencia Orange, Design Pure Traction pack (Gone)
E89 23i sDrive, Silver (Gone)
- r2uzenblot
- Member
- Posts: 291
- Joined: Fri Oct 22, 2021 9:39 am
- Location: Shropshire
M40i brakes - design flaw uncovered
I have learned to live with this. Drive back and forth a few times braking sharply as you stop to change direction. Should free it but not gauranteed.
2023 G29 20i M Sport Portimao Blue
2021 Triumph Tiger GT Pro
2008 Triumph Sprint ST
2020 Cube Hybrid
1954 Two feet
2021 Triumph Tiger GT Pro
2008 Triumph Sprint ST
2020 Cube Hybrid
1954 Two feet
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- Newbie
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M40i brakes - design flaw uncovered
Lol. Very nice chap named Charlie turned up within 20 mins, whipped the front wheel off and got two stones out from between heat shield and disc and I was on my way again within an hour.
Will be calling BMW tomorrow to log the issue as well though
Tried to post pic but failed :-/
Will be calling BMW tomorrow to log the issue as well though
Tried to post pic but failed :-/
- Jim S
- Member
- Posts: 405
- Joined: Mon Dec 26, 2016 9:59 pm
- Location: Ayrshire, Scotland
M40i brakes - design flaw uncovered
I know your pain all too well as the original poster of this issue.
- gwatson
- Senior Member
- Posts: 1276
- Joined: Tue Aug 21, 2007 1:23 pm
- Location: Aberdeenshire
M40i brakes - design flaw uncovered
Hi guys,
Hope everyone is well. I check back here now and again, was already great forum
Just to confirm since I now own a Supra, this has happened to me twice in 8 months over 3500 miles Brakes and suspension are all stamped with BMW logo and part numbers.
Both times the wheel had to come off, couldn't dislodge it by reversing. Super embarrassing, car turned into a head turned for all the wrong reasons
Car is on axle stands at the moment, so this reminded me to bend the stone protectors back a little.
Hope everyone is well. I check back here now and again, was already great forum
Just to confirm since I now own a Supra, this has happened to me twice in 8 months over 3500 miles Brakes and suspension are all stamped with BMW logo and part numbers.
Both times the wheel had to come off, couldn't dislodge it by reversing. Super embarrassing, car turned into a head turned for all the wrong reasons
Car is on axle stands at the moment, so this reminded me to bend the stone protectors back a little.
Current:
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E89 SDrive 30i M Sport - Manual
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Previous:
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ESS Stage 2 Supercharged E85 3.0