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7 Series - F01 / F02 (2009 - current)
The new re-designed 7 series F01 / F02 leads off the BMW Fxx chassis code!

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  #1  
Old 11-18-2012, 07:41 PM
negealum negealum is offline
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Location: Calgary
 
Join Date: Nov 2012
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Mein Auto: 750i
Premature tire wear on rear wheels 2012 750i

Hi All,

I am wondering if anyone else has had an issue similar to mine. Recently upon switching out my tires to winter tires, I noticed that both rear wheels on the inside (from the inside of the tire to about 2.5 inches) the tread had worn down to the steel. I have about 12000 miles or 21000km on the car. I made note of this and had the dealer ( Calgary BMW ) look at the tires during my most recent service. They told me that I had probably gone over a pothole and bent the suspension of the car and even maybe the frame the estimated cost of repair would be anywhere from $2000 x 2 for changing the suspension parts on each wheel and alignment and then if changing the subframe is needed then from $6000 to $10000. Of course, I do not believe this is plausible hat going over a pothole could cause this kind of damage. I suspect there is a suspension issue but they are saying they need to keep changing out parts until they solve the problem and of course, I am on the hook for all the costs because as they say "BMW does not sell bent cars". I am at a loss as to what I should do to further pursue the cause of this problem other than either paying them an exorbitant amount of money or trying to get a lawyer on the case to get their attention. IM hoping some of your can give me some advice on this.

ALso, I will say that both my front goodyear run flat excellence tires have already developed bubbles and I am also at a loss as I drove a 2008 BMW 750i through the same roads , driveway, etc and never had any issues even close to this with tires and wheels. Mine is a 2012 750i M sport with the technology package etc fully loaded and I paid $140000 for the car - I am very disappointed that my local dealer will not pursue the issue. Clearly if I had caused the problem I would own up to this and pay, but it leaves a very bitter taste in my mouth to pay this kind of money for a car and then have to pay another $15000 within 8 months to fix issues which I am certain i did not cause. I was very close to buying a bentley but went back to BMW because I had good service with them in the past with my 2008 750i - now I am regretting not stepping up getting the continental GT. Any advice on these issues would be greatly appreciated.

Thanks in advance!

Ritchie
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  #2  
Old 11-18-2012, 08:55 PM
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joyism5 joyism5 is offline
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Location: USA
 
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Mein Auto: '99 740IL, K75RT
Is the car equipped with approved tire and wheel size? Often people put oversized wheels/tires without knowing how that can affect the suspensions geometry.I had a similar problem with mine, and in my case this issue went away after I replaced the rear control arms(AKA whishbone, wheel carier?). #17 in this diagram http://realoem.com/bmw/showparts.do?...44&hg=33&fg=30
The joint was worn and aloud the wheel to stay at an angle, where the tire was making contact with the road more on the inside. I would take the car to an alignment shop and tell them to print out the initial values. On the print out it can be seen exactly how bad are the wheels sitting on the ground. I would not suspect a bent subframe (the frame must be a joke) unless the car has been dropped from an helicopter.
A friend of mine had a similar issue with an X5 and got it a corrected by a specialized shop in BMW alignments.
PS.: not all dealers are BMW specialists. But they sure know how to ripp off people.
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Old 11-18-2012, 08:58 PM
negealum negealum is offline
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Location: Calgary
 
Join Date: Nov 2012
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Mein Auto: 750i
Thanks! The tires are the original OEM 21 inch m sport rims and tires... I still couldnt believe that something be bent or worn out liek that after 8 months on the road - thanks for you advice tho
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Old 11-19-2012, 11:52 AM
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joyism5 joyism5 is offline
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Mein Auto: '99 740IL, K75RT
wohooo...21" is not the right size, but I just realized that you were asking about a 2012 750 not an E38 750. This is a E38 section (1995-2001 7 series section). So disregard the link above with the diagram. Even so, If I were you, I would still take the car to an alignment shop.
PS. If you post this, in the right section (F01) you might get a better answer.
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Last edited by joyism5; 11-19-2012 at 11:53 AM.
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