1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Cracks in BMW Alloys

Discussion in 'Motors' started by Hamish, 14 Apr 2016.

  1. Hamish

    Mobster

    Joined: 14 Apr 2003

    Posts: 4,955

    Location: Deepest Yorkshire

    So frustrating!
    About a year ago I took my 2007 BMW 330i touring in for MOT and found that both rear wheels had cracked. Got them both welded and put back on.

    6 months later one of them had cracked again, so replaced it with a refurbished, never repaired BMW MV3 alloy.

    3 months later, take it in for MOT again today and find that not only has the previously repaired wheel cracked, but the new one has cracked again!

    Now I'm looking at having to spend £400 each for some new wheels from BMW, or £200 for refurbished ones which might do the same again :mad:

    Not a happy bunny!
     
  2. tom_e

    Man of Honour

    Joined: 26 Dec 2003

    Posts: 27,510

    Location: Shropshire

    Stop putting BMW wheels back on? Complain to BMW as that doesn't seem right? Stop driving a warp speed over potholes and small children?
     
  3. MacRS4

    Wise Guy

    Joined: 15 Dec 2008

    Posts: 2,457

    Location: London

    Take it to BMW. I had a couple replaced on my old 2006 E46 even though it was well out of warranty.
     
  4. Hamish

    Mobster

    Joined: 14 Apr 2003

    Posts: 4,955

    Location: Deepest Yorkshire

    Well unless I want to replace the fronts as well and have a car with aftermarket alloys which will make it difficult to sell then I have no choice.
    And I live in the countryside so potholes are unavoidable.
     
  5. [TW]Fox

    Man of Honour

    Joined: 17 Oct 2002

    Posts: 156,932

    This is an incredibly well known issue and was a major thing on watchdog about 5 years ago. The reality is that on a 9 year old car BMW will not be interested. Avoid 19 inch wheels and runflats seems to be the right approach.

    With the extra sidewall compliance of a non rft the MV3 should be ok but they are cheap on eBay now anyway.
     
  6. xs2man

    Mobster

    Joined: 21 Jul 2008

    Posts: 4,846

    Yep, well known issue for BMW wheels running RFT's. As fox said, stick to 18's with non-RFT rubber.
     
  7. Finglonga

    Wise Guy

    Joined: 20 Aug 2008

    Posts: 1,812

    Location: Stafford

    I just ditched the run flats and had zero problems.
     
  8. Will Gill

    Don

    Joined: 18 Oct 2002

    Posts: 56,145

    Location: Cornwall & Sail.Number: GBR 3936

    Ditching runflats = ditching cracks, worked for me anyway
     
  9. Sanchez

    Mobster

    Joined: 20 Oct 2002

    Posts: 2,681

    So far only one of my MV3s has cracked and this was prior to me owning it. The style 225 and 313 are horrendous for it. I run funflats on mine and just avoid potholes. I'll be ditching them when they need replacing though.
     
  10. Evo8

    Hitman

    Joined: 29 Aug 2014

    Posts: 709

    Location: Glasgow

    What does the onboard computer say about not fitting RFT? Does it not flag something up?
     
  11. [TW]Fox

    Man of Honour

    Joined: 17 Oct 2002

    Posts: 156,932

    How exactly does the onboard computer know whether the tyre is an RFT or not? :p
     
  12. Evo8

    Hitman

    Joined: 29 Aug 2014

    Posts: 709

    Location: Glasgow

    Does it not warn you when you have a puncture? I'm not sure, never owned a BMW.
     
  13. mrk

    Man of Honour

    Joined: 18 Oct 2002

    Posts: 87,161

    Location: South Coast

    Tyre pressure monitoring is done via the wheel speed sensor. So if a wheel is letting out air it will not be rotating at the same speed as the others and the TPM system will flag it up as such.
     
  14. [TW]Fox

    Man of Honour

    Joined: 17 Oct 2002

    Posts: 156,932

    It does but it does this irrespective of tyre type.
     
  15. Finglonga

    Wise Guy

    Joined: 20 Aug 2008

    Posts: 1,812

    Location: Stafford

    The only thing I was told was BMW recovery will not come out if it was for a puncture. I carried a can of foam and compressor around in the boot.
     
  16. acemastr

    Mobster

    Joined: 29 May 2010

    Posts: 4,721

    Location: Tampa, Florida

    You sure? The past 2 vehicles I've had with TMPS are on the inside of the valves within the wheel
     
  17. [TW]Fox

    Man of Honour

    Joined: 17 Oct 2002

    Posts: 156,932

    There are two systems, most BMW's with flat tyre monitoring simply do that - monitor for a flat tyre. They do this in conjunction with the wheel speed sensors and as a result do not give you tyre pressure information - simply an indication that the pressures are either 'ok' or 'not ok' in each wheel.

    Some BMW's do have the more complex system that gives you an actual pressure reading but it's often an expensive option. When fitted, this system uses special valves, but his E90 3 Series will be fitted with the simpler system.

    Stick to Toyota's ;)

    (Come on, I couldn't resist that :D)
     
  18. acemastr

    Mobster

    Joined: 29 May 2010

    Posts: 4,721

    Location: Tampa, Florida

    Ah you did read my post ;)

    Knowledge absorbed! (looks at his nice tire pressure read out)