Why a history check matters on a BMW X5
G05 X5 (2018+) M50i has documented N63B44 V8 timing-chain guide wear at 100,000km — a $14k repair. Verify dealer service stamps; non-BMW oil voids the warranty silently. The xDrive transfer-case actuator on E70/F15 examples (used market) is a known $3k failure.