No. I don't think they have any more problems than the others. If there are any problems, they are common to all X5's. They all use the same crappy window regulators, final stage resistors, oxygen sensors, etc. I have not heard of any problems unique to the 3.0 I6 engine. Actually, I think it's quite solid.

Very weak? That's relative. I have the 3.0 and it has been fine for me. I don't tow anything so the 4.4 wasn't necessary. Are there times I'd like a little more power? Of course but don't we all?

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