I have 85K on my 01' 4.4. I plan to keep it for several more years and hopefully another 80K miles. It still looks and drives like new. As for major repairs, transmission, suspension, electronics, etc, I'll repair them as necessary and still be ahead of the cost of a new E70 which will be the eventual replacement. As for depreciation, when I'm done with the 01' I'll give it away. It's hard to live without a SAV (SUV) in the family.

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2013 X5 3.5i M Sport
2004 M3 cabriolet SMG