taylorboosh
Member
Registered: 3rd Apr 07
User status: Offline
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Not sure tbh??? I just know to fix it properly it needs replacing
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Tomnova16
Premium Member
Registered: 21st Jan 06
Location: Gerrards Cross Drives: Porsche 911
User status: Offline
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It happens to the non m's too. I did an old 325 dog the other week.
http://www.lemass.co.uk/ for all your automotive/bodyshop needs
Located in Chalfont st Peter
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deanmcreynolds26
Member
Registered: 15th Sep 03
Location: E46 //M3
User status: Offline
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It's the rear axle carrier panel that cracks. Basically the part that the diff carrier/subframe connects to the car.
Old one out new one in and a resin injection to make it stronger. A few companies are also offering a strengthening kit which is basically a series of plates welded to the points that are known to crack.
If the car is over ten year old and hasn't had a new floor it can be be an expensive gamble. Luckily mines was done a few years ago.
Really nice looking LSB mate
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Skylined
Member
Registered: 27th Sep 05
Location: Sideways, Surrey
User status: Offline
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Can you tell if it's been done by looking or only by the service history?
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SVM 286
Member
Registered: 13th Feb 05
Location: pain
User status: Offline
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quote:
Originally posted by Adam-D
what is done to the subframe to make it good then?
It's not the subframe Adam. It's the body itself.
The boot floor actually tears at load bearing points where the suspension hardware and subframe attach.
Some have gone REALLY badly. There's footage on youtube of one example where the rear of the car is more or less on the verge of breaking off. (the drive-train, suspension and exhaust componentry were all helping to hold the car together)
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taylorboosh
Member
Registered: 3rd Apr 07
User status: Offline
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quote:
Originally posted by Skylined
Can you tell if it's been done by looking or only by the service history?
Mine looked brand new and also had receipts.. Bmw do a free check though
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Jambo
Member
Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
User status: Offline
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Z3's also suffer from a very similar issue.
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flybikeslee
Member
Registered: 2nd Jan 07
Location: Liverpool
User status: Offline
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Ben G
Member
Registered: 12th Jan 07
Location: Essex
User status: Offline
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Glad I've got a z4 then.
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SVM 286
Member
Registered: 13th Feb 05
Location: pain
User status: Offline
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http://www.youtube.com/watch?v=hvyfSpHpx6A
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mike56gte
Member
Registered: 23rd Jun 09
Location: Fife, scotland Drives: Audi S3
User status: Offline
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quote:
Originally posted by SVM 286
http://www.youtube.com/watch?v=hvyfSpHpx6A
Thats scary! 
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SVM 286
Member
Registered: 13th Feb 05
Location: pain
User status: Offline
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Such a shame too. Such lovely cars. And for BMW to make such a fundamental error in the body design and manufacture, just spoils the whole idea of the car and owning one.
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Adam-D
Member
Registered: 11th May 02
Location: Cheshire
User status: Offline
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kinda puts you off owning one
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Jambo
Member
Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
User status: Offline
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I had a Z3, and an E46 and neither had cracked 
That said, the E46 was only 7years old at the time so wasnt old or massively high miles.
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Graham88
Member
Registered: 16th Apr 07
Location: South East Kent Drives: E46 M3
User status: Offline
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Thing is you say BMW made an error, but most cars needing them replaced are 7-8 years old now and BMW will happily replace it if the car is standard which I think is pretty fair…if you've modified it then you've potentially sped up the process. I know so many that have never cracked but you only hear about the ones that have….
4k job is mostly labour through BMW and the replace the whole boot floor, a mates CSL has just had it done and his car is modified and tracked too, it's down to certain friendly BMW dealers.
The cheaper alternative is the injection resin but this just delays the problem rather than prevents it
The option I'd go for if it happened to me is drop the subframe and weld the cracks then you can buy plates you weld around the mounting points for about £150, there's no reason why it would ever crack again
It's a minor issue tbh I don't see why people make such a big deal out of it it's a pretty easy fix even more so if you don't mind getting your hands dirty as I'd do all the work myself
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taylorboosh
Member
Registered: 3rd Apr 07
User status: Offline
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I still think thats a bodge on a 5 sec to 60 and 155 mph car
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j10E W
Member
Registered: 30th Sep 04
Location: maidstone
User status: Offline
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Mine cracked it was a right cunt dealer i got it from fixed it luckily,
Kieran is ur pal local? Il keep an eye out for that it looks beautiful,
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John
Member
Registered: 30th Jun 03
User status: Offline
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I'd say the back falling off the car is a pretty major problem, which is why BMW normally fix/contribute.
If it wasn't a big deal they probably wouldn't even acknowledge it.
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Ian
Site Administrator
Registered: 28th Aug 99
Location: Liverpool
User status: Offline
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quote:
Originally posted by SVM 286
http://www.youtube.com/watch?v=hvyfSpHpx6A
Can't help thinking that should have been attended to well before it to go that point.
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Tomnova16
Premium Member
Registered: 21st Jan 06
Location: Gerrards Cross Drives: Porsche 911
User status: Offline
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Mine was fine. 2001 car too
http://www.lemass.co.uk/ for all your automotive/bodyshop needs
Located in Chalfont st Peter
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Kieran
Premium Member
Registered: 12th Sep 08
Location: Kent
User status: Offline
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quote:
Originally posted by j10E W
Mine cracked it was a right cunt dealer i got it from fixed it luckily,
Kieran is ur pal local? Il keep an eye out for that it looks beautiful,
Yes mate lives in Maidstone and is always about of a evening
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N16K
Member
Registered: 4th Oct 04
Location: Belfast, NI Drives: Corsa D SRi, Tuned Cooper S, B
User status: Offline
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I love / hate that blue.
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corb
Member
Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
User status: Offline
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saw this Saturday night on my stagger home from moons, going past the old cinema and thought 'oooh, I love this colour' !
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Graham88
Member
Registered: 16th Apr 07
Location: South East Kent Drives: E46 M3
User status: Offline
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quote:
Originally posted by taylorboosh
I still think thats a bodge on a 5 sec to 60 and 155 mph car
190*
Not a bodge at all. A bodge is just injecting resin. Dropping everything and welding the cracks properly is hardly a bodge.
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taylorboosh
Member
Registered: 3rd Apr 07
User status: Offline
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Well it is because not only the metal around the cracks but every join on the panel is weakened
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