I bought my 06 4.8IS about a year ago at this point with 25k on it. My advice would be to get a warranty with it. They typically price warranties off of the miles on the car (more than year). Since the miles are low the cost really isn't that bad. So far I have had over $10,000 worth (at dealer prices) work done on the truck utilizing my warranty. Its nice to be able to be really picky about stuff and have it all fixed

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2006 X5 4.8is