Quote:
Originally Posted by nthretourNAFTW
There is a leaked official B failure rate % from BMW. Don't try to ask me where I got it from, I cannot reveal it. So don't ask, i won't answer.
It's 2-4% including all supercharged and tuned cars (which are evidently more susceptible to engine failure). If you remove SC and tuned cars it's even smaller.
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Just to play devils advocate here. Your "very reliable source" couldn't narrow down the number between 2%-4%? Don't you think if you had that information you could say to the decimal place how many engines had blown? 2-4% is a huge range when it comes to defects in cars. Also, what do you think the average mileage is across all M3's? If you include 2012's and 2013's, probably around 30k-40k? At 10k miles/year an 2008 would have around 60k miles, and a 2013 would have 10k, so I think this is a pretty reasonable guess. That fact that as many as 4% of engines with an average of 30k miles have already failed is bad news for those looking to get 100k out of the car. That could mean a failure rate as high as 12% by 90k miles.
I get these are "worst case" numbers but lets not pretend that 2-4% range is fixed. It will only continue to go up as these cars age.