Then I wonder is the heat shield in the Supra different in design and can it be fitted to the Z4? If anyone has a friend with a Supra it might be worth looking in to.Jim S wrote: ↑Wed Mar 03, 2021 10:39 pmI have not heard that the Supra has the same problem. As far as I am aware it is only BMW and Mini that is affected, as the M Sport brakes in these models all use the same design of heat shield.TheGingerOneNI wrote: ↑Wed Mar 03, 2021 10:26 pm Is this also an issue with the Supra? If not is there a different heat shield on them?
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M40i brakes - design flaw uncovered
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M40i brakes - design flaw uncovered
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M40i brakes - design flaw uncovered
if the exhaust didn't get hit by the modified brake part flying off...Smartbear wrote: ↑Thu Mar 04, 2021 12:15 amIf you modified the disc shield i don’t think it would nullify the warranty for any other part of the car apart from the shield.Jim S wrote: ↑Tue Jan 05, 2021 10:24 amYes John, I can see that that might work but I would not want to void my warranty. BMW really should seriously consider designing a new front set of heat shields for the M Sport brakes, not only for the Z4 G29 but also for the several other series models where they are fitted. And they should retrospectively fit them to ALL affected models. I think the cost of recalling all the affected cars is what will prevent BMW from carrying this out. Shame on BMW as they are putting profits ahead of the extreme inconvenience that this is causing customers like me and several others that have been affected by this problem.
If the exhaust fell off for example, it would still be covered.
Rob
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M40i brakes - design flaw uncovered
The supra brakes look identical to me:TheGingerOneNI wrote: ↑Thu Mar 04, 2021 8:14 pmThen I wonder is the heat shield in the Supra different in design and can it be fitted to the Z4? If anyone has a friend with a Supra it might be worth looking in to.Jim S wrote: ↑Wed Mar 03, 2021 10:39 pmI have not heard that the Supra has the same problem. As far as I am aware it is only BMW and Mini that is affected, as the M Sport brakes in these models all use the same design of heat shield.TheGingerOneNI wrote: ↑Wed Mar 03, 2021 10:26 pm Is this also an issue with the Supra? If not is there a different heat shield on them?
I doubt there are many parts actually designed by Toyota on the Supra
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Onlineronk
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M40i brakes - design flaw uncovered
The backplates don’t look the same?
That’s where the problem starts I think.
That’s where the problem starts I think.
Last edited by ronk on Fri Mar 05, 2021 11:14 pm, edited 1 time in total.
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.
So I bought a 35is with all the toys to play with.
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M40i brakes - design flaw uncovered
Not conclusive as in the pictures they look different and the Supra lip looks to curve over the top of the discs whereas the G29 looks to taper out the way which I presume allows the stones in and become trapped.
What looks like the better news is on the OE website for both cars the plates looks the same, same pattern, mounting points etc so if the above is correct will possibly offer protection the BMW one doesn’t. So what we need is an M40i owner who has the time and inclination to order one (or take the punt it’s different and buy a pair) and compare them and do a like for like. If ok and they want keep and fit, if not return for a refund??
What looks like the better news is on the OE website for both cars the plates looks the same, same pattern, mounting points etc so if the above is correct will possibly offer protection the BMW one doesn’t. So what we need is an M40i owner who has the time and inclination to order one (or take the punt it’s different and buy a pair) and compare them and do a like for like. If ok and they want keep and fit, if not return for a refund??
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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)
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M40i brakes - design flaw uncovered
You need to compare them looking at a front view.
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M40i brakes - design flaw uncovered
That’s an open invite for stones and debris !
Good for airflow but nothing else.
The bottom of the backplate looks like a good way of preventing a stone dropping out
Good for airflow but nothing else.
The bottom of the backplate looks like a good way of preventing a stone dropping out
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.
So I bought a 35is with all the toys to play with.
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M40i brakes - design flaw uncovered
That is a shocking gap Jim, the stones can only go one way - in
I wonder if there a Supra forum to see if there’s any similar complaints or comparison pictures
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)
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M40i brakes - design flaw uncovered
And they get trapped at the bottom because the heat shield turns in at the track rod end closing the gap.Argyll Andy wrote: ↑Sat Mar 06, 2021 5:26 pmThat is a shocking gap Jim, the stones can only go one way - in
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M40i brakes - design flaw uncovered
Be better not having them than that backwards designJim S wrote: ↑Sat Mar 06, 2021 7:26 pmAnd they get trapped at the bottom because the heat shield turns in at the track rod end closing the gap.Argyll Andy wrote: ↑Sat Mar 06, 2021 5:26 pmThat is a shocking gap Jim, the stones can only go one way - in
Stupid question maybe but are they actually necessary?
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)
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M40i brakes - design flaw uncovered
I asked my dealer if I could have the heat shields removed as they are not really necessary unless you are on the race track or driving the car very hard, causing the disks to really heat up. The dealer was not too keen to remove them.
However, I told the dealer that if I keep getting stones trapped in the brakes that I might insist on having the shields removed. So far I have not reached that point yet, but I won’t discount that option in the future.
However, I told the dealer that if I keep getting stones trapped in the brakes that I might insist on having the shields removed. So far I have not reached that point yet, but I won’t discount that option in the future.
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Onlineronk
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M40i brakes - design flaw uncovered
I think I would be more tempted to go into a Toyota dealership and discuss your options with them ?Jim S wrote: ↑Sat Mar 06, 2021 7:53 pm I asked my dealer if I could have the heat shields removed as they are not really necessary unless you are on the race track or driving the car very hard, causing the disks to really heat up. The dealer was not too keen to remove them.
However, I told the dealer that if I keep getting stones trapped in the brakes that I might insist on having the shields removed. So far I have not reached that point yet, but I won’t discount that option in the future.
If the Toyota part is fitted and the stone trap problem goes away, you’ll have a big stick to hit them with!
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.
So I bought a 35is with all the toys to play with.
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M40i brakes - design flaw uncovered
I would want the work done under warranty.ronk wrote: ↑Sat Mar 06, 2021 8:03 pmI think I would be more tempted to go into a Toyota dealership and discuss your options with them ?Jim S wrote: ↑Sat Mar 06, 2021 7:53 pm I asked my dealer if I could have the heat shields removed as they are not really necessary unless you are on the race track or driving the car very hard, causing the disks to really heat up. The dealer was not too keen to remove them.
However, I told the dealer that if I keep getting stones trapped in the brakes that I might insist on having the shields removed. So far I have not reached that point yet, but I won’t discount that option in the future.
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Onlineronk
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M40i brakes - design flaw uncovered
Then think you are going to have to start banging the table.Jim S wrote: ↑Sat Mar 06, 2021 8:06 pmI would want the work done under warranty.ronk wrote: ↑Sat Mar 06, 2021 8:03 pmI think I would be more tempted to go into a Toyota dealership and discuss your options with them ?Jim S wrote: ↑Sat Mar 06, 2021 7:53 pm I asked my dealer if I could have the heat shields removed as they are not really necessary unless you are on the race track or driving the car very hard, causing the disks to really heat up. The dealer was not too keen to remove them.
However, I told the dealer that if I keep getting stones trapped in the brakes that I might insist on having the shields removed. So far I have not reached that point yet, but I won’t discount that option in the future.
There is an area visiting BMW tech guru - I suggest you ask for a meeting with him . I had a problem with my car albeit minor, he sanctioned a very agreeable compensation package.
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.
So I bought a 35is with all the toys to play with.