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M40i brakes - design flaw uncovered

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Jim S
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M40i brakes - design flaw uncovered

Post by Jim S » Sat Jan 20, 2024 4:53 pm

I keep a scissor jack, wheel nut spanner and socket, plus a long screwdriver in the boot and remove the stone myself if and when it happens. Been a while now. Seems like when the tyres wear a bit and lose their “stickiness” the problem occurs less frequently. :driving:

McHaggis69
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M40i brakes - design flaw uncovered

Post by McHaggis69 » Sat Feb 03, 2024 8:12 pm

For info

I had my car in at BMW for its MoT within the last two weeks and raised the matter with them.

"Its not something we've heard of and there are no recalls..."

I should have pointed them to this thread.
I've owned dozens of cars and this Z4 is the only one I've ever experienced stones getting trapped and its happened twice!
2020-2023 E89 Z4 sDrive30iM Sport
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ronk
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M40i brakes - design flaw uncovered

Post by ronk » Sat Feb 03, 2024 8:19 pm

McHaggis69 wrote: Sat Feb 03, 2024 8:12 pm
"Its not something we've heard of and there are no recalls..."
It sounds like they may have been previously employed by Thd Post Office !
You don't stop playing when you get old - You get old when you stop playing!
So I bought a 35is with all the toys to play with. :thumbsup:

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Jim S
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M40i brakes - design flaw uncovered

Post by Jim S » Sat Feb 03, 2024 8:32 pm

McHaggis69 wrote: Sat Feb 03, 2024 8:12 pm For info

I had my car in at BMW for its MoT within the last two weeks and raised the matter with them.

"Its not something we've heard of and there are no recalls..."

I should have pointed them to this thread.
I've owned dozens of cars and this Z4 is the only one I've ever experienced stones getting trapped and its happened twice!
They know very well about the problem. It happened to me 5 times in the first 1,270 miles of ownership in 2019. I even wrote directly to Mr Grieve, UK MD, and reported each occasion to my dealer who passed on photographs of the problem to their Technical Department in Germany HO. :headbang:

Poor show from BMW. :thumbsdown:

ori
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M40i brakes - design flaw uncovered

Post by ori » Sun Feb 04, 2024 6:01 pm

Jim S wrote: Sat Feb 03, 2024 8:32 pm
McHaggis69 wrote: Sat Feb 03, 2024 8:12 pm For info

I had my car in at BMW for its MoT within the last two weeks and raised the matter with them.

"Its not something we've heard of and there are no recalls..."

I should have pointed them to this thread.
I've owned dozens of cars and this Z4 is the only one I've ever experienced stones getting trapped and its happened twice!
They know very well about the problem. It happened to me 5 times in the first 1,270 miles of ownership in 2019. I even wrote directly to Mr Grieve, UK MD, and reported each occasion to my dealer who passed on photographs of the problem to their Technical Department in Germany HO. :headbang:

Poor show from BMW. :thumbsdown:
How did you write to me grieve? Can you pm me the email address? I wish to do something similar.

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Jim S
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M40i brakes - design flaw uncovered

Post by Jim S » Sun Feb 04, 2024 7:11 pm

ori wrote: Sun Feb 04, 2024 6:01 pm
Jim S wrote: Sat Feb 03, 2024 8:32 pm
McHaggis69 wrote: Sat Feb 03, 2024 8:12 pm For info

I had my car in at BMW for its MoT within the last two weeks and raised the matter with them.

"Its not something we've heard of and there are no recalls..."

I should have pointed them to this thread.
I've owned dozens of cars and this Z4 is the only one I've ever experienced stones getting trapped and its happened twice!
They know very well about the problem. It happened to me 5 times in the first 1,270 miles of ownership in 2019. I even wrote directly to Mr Grieve, UK MD, and reported each occasion to my dealer who passed on photographs of the problem to their Technical Department in Germany HO. :headbang:

Poor show from BMW. :thumbsdown:
How did you write to me grieve? Can you pm me the email address? I wish to do something similar.
I sent an email to:
[email protected]

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M40i brakes - design flaw uncovered

Post by ori » Tue Feb 06, 2024 5:54 pm

[/quote]

I sent an email to:
[email protected]
[/quote]

Did you get a response? I’m drafting an email now.

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Jim S
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M40i brakes - design flaw uncovered

Post by Jim S » Tue Feb 06, 2024 6:03 pm

ori wrote: Tue Feb 06, 2024 5:54 pm
I sent an email to:
[email protected]
[/quote]

Did you get a response? I’m drafting an email now.
[/quote]

Yes I did receive a response at the time from his assistant. 👍
Current: 2019 Z4 M40i (G29)
Previous BMW's (all new):
2017 520d MSport xDrive (G30)
2016 Z4 20i sDrive SE (E89)
2014 428i MSport Gran Coupe (F36)
2009 530d SE Gran Turismo (F07)
2007 525d SE (E60 LCI)
2005 523i SE (E60)
2002 320d SE (E46)
1982 520i (E28)

ori
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M40i brakes - design flaw uncovered

Post by ori » Wed Feb 07, 2024 6:34 pm

Thanks Jim, I have just emailed that address along with what I think is the new guys email address. ;)

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Jim S
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M40i brakes - design flaw uncovered

Post by Jim S » Wed Feb 07, 2024 6:45 pm

ori wrote: Wed Feb 07, 2024 6:34 pm Thanks Jim, I have just emailed that address along with what I think is the new guys email address. ;)
Good luck. Hopefully you will receive a positive response. Let us know how you get on. :driving:

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M40i brakes - design flaw uncovered

Post by hairyfrogowl » Tue Apr 02, 2024 8:16 pm

Has any kind of fix been found for this? Considering a Z and I have a shingle drive way!!

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