The 3.0i's are virtually impossible to find in the UK. Yes, the inline 6's are more reliable, but they are gutless and worse economy then the V8's.

The aforementioned problems aren't guaranteed. I know of a 4.4 that has 200,000 on it and hasn't had anything done engine wise apart from coolant stuff and the gearbox.

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BMW X5 4.4 2004