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Dreaded Run Flats / 326M alloys

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
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Zed Five
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Dreaded Run Flats / 326M alloys

Post by Zed Five » Sat Feb 25, 2017 12:02 am

ronk wrote:
Zed Five wrote:There is, but there is no obligation. My point is, noone can moan once out of warranty. :|
However goods do have to be fit for purpose and exhibit a quality that could be reasonably expected?
The warranty period is considered reasonable in the eyes of the law. Otherwise, i'd buy an old E30 and take is back to moan about the rust! :D
Why is it that people who can't take advice always insist on giving it? 

E89 35is | BMW S1000rr Motorsport Ed.

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Dreaded Run Flats / 326M alloys

Post by ronk » Sat Feb 25, 2017 12:36 am

But that wouldn't be reasonable to expect an old car with maybe dubious history to be free of rust? :D

It seems to me that cracked wheel claims are being rejected based on some very suspect hypothesis and certainly not based on any engineering or metallurgical analysis.
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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Dreaded Run Flats / 326M alloys

Post by BlackyBoy » Sat Mar 25, 2017 10:24 pm

More than sluggish response..apologies...'twas slow puncture on rear left. Both rears need replacing anyway so that will be circa £450 :( but on bright side this I'm hoping rules out any more drastic problems...

P.S roof down weather has arrived folks :)
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ronk
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Dreaded Run Flats / 326M alloys

Post by ronk » Sat Mar 25, 2017 11:19 pm

My guess was right!
I wish I could pick the lottery numbers as well :thumbsup:
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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Dreaded Run Flats / 326M alloys

Post by BlackyBoy » Wed Mar 29, 2017 12:45 pm

Hi does anyone know if replacing awful Bridgestone rft's with the Michelin run flats which have very positive reviews effects the idrive the pressure monitor? In other words will it still work normally? Can't see any reference or threads mentioning it..

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Dreaded Run Flats / 326M alloys

Post by willgill » Wed Mar 29, 2017 3:07 pm

My TPMS did nothing when this happened

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tyre was completely flat, had about 6mm left, as did the opposite wheel!

Good riddance RFTs....
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Dreaded Run Flats / 326M alloys

Post by Nictrix » Wed Mar 29, 2017 4:53 pm

willgill wrote:My TPMS did nothing when this happened

Image

tyre was completely flat, had about 6mm left, as did the opposite wheel!

Good riddance RFTs....
Was it set properly?
E89 2014 35i M Sport Black with Black leather :)

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Dreaded Run Flats / 326M alloys

Post by willgill » Wed Mar 29, 2017 4:57 pm

According to Ocean BMW the last time the RFTs were replaced at Sytner (not by me) the TPS was calibrated.

I'm not sure if the e89's TPS is based on rotational reduction or internal pressure, either way it should have pinged up regardless, the tyres were totally flat.
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Dreaded Run Flats / 326M alloys

Post by ronk » Wed Mar 29, 2017 5:31 pm

My previous Dec 2010 was by rotation the Sept 2016 has a tpms system - I don't know when tpms was introduced.
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Dreaded Run Flats / 326M alloys

Post by extrablatt » Wed Mar 29, 2017 5:44 pm

willgill wrote:According to Ocean BMW the last time the RFTs were replaced at Sytner (not by me) the TPS was calibrated.

I'm not sure if the e89's TPS is based on rotational reduction or internal pressure, either way it should have pinged up regardless, the tyres were totally flat.
Apart from the dealer calibration, were you also manually resetting the TPMS every time you fill your tyres? If not the tyres won't be set to the correct pressure.
2013 E89 35iS Mineral White
19" 326M | heated seats & wheel | pro nav & hifi | stubby

Gone: 2010 E89 23i Space Grey

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Dreaded Run Flats / 326M alloys

Post by willgill » Wed Mar 29, 2017 5:50 pm

extrablatt wrote:
willgill wrote:According to Ocean BMW the last time the RFTs were replaced at Sytner (not by me) the TPS was calibrated.

I'm not sure if the e89's TPS is based on rotational reduction or internal pressure, either way it should have pinged up regardless, the tyres were totally flat.
Apart from the dealer calibration, were you also manually resetting the TPMS every time you fill your tyres? If not the tyres won't be set to the correct pressure.
Never touched the tyres aside from a visual inspection for tread, probably done less than 1000 miles since I bought the car certainly never added any air to them. I can't think of any car I've owned that I've had to constantly add air too, what are you doing to warrant that?
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Dreaded Run Flats / 326M alloys

Post by mr wilks » Wed Mar 29, 2017 6:33 pm

willgill wrote:
extrablatt wrote:
willgill wrote:According to Ocean BMW the last time the RFTs were replaced at Sytner (not by me) the TPS was calibrated.

I'm not sure if the e89's TPS is based on rotational reduction or internal pressure, either way it should have pinged up regardless, the tyres were totally flat.
Apart from the dealer calibration, were you also manually resetting the TPMS every time you fill your tyres? If not the tyres won't be set to the correct pressure.
Never touched the tyres aside from a visual inspection for tread, probably done less than 1000 miles since I bought the car certainly never added any air to them. I can't think of any car I've owned that I've had to constantly add air too, what are you doing to warrant that?
So in your 1000 miles you never once checked all 4 tyre pressures other than visually :?
There is so little sidewall its very easy to have 3 tyres correctly pressured & 1 running say 15Psi ?
As i understand it you can reset the TPMS with 4 differing pressures & only if one of those 4 alters will it ping so you could well have covered your 1000miles whilst the tyre was technically running flat hence the outcome you pictured :cry:
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Dreaded Run Flats / 326M alloys

Post by Smartbear » Wed Mar 29, 2017 6:39 pm

ronk wrote:My previous Dec 2010 was by rotation the Sept 2016 has a tpms system - I don't know when tpms was introduced.
My Sep 13 car is also rotational & not pressure.
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e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si sold

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Dreaded Run Flats / 326M alloys

Post by willgill » Wed Mar 29, 2017 6:47 pm

mr wilks wrote:
willgill wrote:
extrablatt wrote:
Apart from the dealer calibration, were you also manually resetting the TPMS every time you fill your tyres? If not the tyres won't be set to the correct pressure.
Never touched the tyres aside from a visual inspection for tread, probably done less than 1000 miles since I bought the car certainly never added any air to them. I can't think of any car I've owned that I've had to constantly add air too, what are you doing to warrant that?
So in your 1000 miles you never once checked all 4 tyre pressures other than visually :?
There is so little sidewall its very easy to have 3 tyres correctly pressured & 1 running say 15Psi ?
As i understand it you can reset the TPMS with 4 differing pressures & only if one of those 4 alters will it ping so you could well have covered your 1000miles whilst the tyre was technically running flat hence the outcome you pictured :cry:
In the past I've probably knocked up 2k+ a week and aside from visual review I'd no more think about checking the tyre pressures than flying to the moon, granted most of the cars I owned had independent pressure monitors on them which should have pinged up any issues, but still it's not something I've done since the heady days of driving to cornwall as a young lad.

Onto the tpms discussion, when you reset it each sensor has its own value recorded and a drop of pressure (or rotation if you have a newer system) would ping an alarm for any and all tyres independently. So it will record one flat tyre after another until you replace them or they all go flat. It's not a one size fails all setup :)

I ordered four replacement sensors because the garage the car got stranded at didnt have an inpa/sss setup to read each value (they were just a hunter specialist)

End of the day I'm glad to see the back of the RFTs, utter garbage tyres. However, maybe I'll change my dependence on technology in the future.
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Dreaded Run Flats / 326M alloys

Post by mr wilks » Wed Mar 29, 2017 6:53 pm

I understand what you say above willgill but its possible (prior to your purchase ) the car had its TPMS reset when 3 tyres were ok & 1 wasn't :? Therefore no triggering would have occurred even though one could well have been running on low pressure for the 1000miles :?
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