[michaelalex3]

Hi all, I've recently started looking into E70 X5Ms as I can't find a nice E61, and I can't find an F15 35i with DHP. I had considered an E70 35i for awhile, but I've changed some priorities with spending (going to spend less on a sports car), so an E70 X5M is well within my budget.

However, I have one really big concern, and that's engine failures. It looks like there are many S63s seizing around 50k-80k miles, and with little warning. While spending ~$15k or so to get a rebuilt engine wouldn't ruin me, it would really suck lol. Plus, I don't want to drive around constantly worried the engine is going to randomly seize. So my question is, are there any known ways to avoid the common failure modes of the S63? Rod/main bearing preemptive replacement? Frequent oil changes? Low temp tstat? Reliable aftermarket warranty (if such a thing even exists)? Any input is greatly appreciated, thanks!