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The concerning thing is BMW touting 15k mile oil changes and lifetime drivetrain fluids so they can advertise a lower cost to maintain. So if followed, this one may have only had 8 or so oil changes when IMHO, it should have had double that. As well, the drivetrain fluids may have never been touched, when they should be coming up on their 2nd change, especially the trans/transfer case/front front diff. Review the maintenance records to determine the fluid change intervals, the lifeblood of the drivetrain.
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