@Ricky Bobby - though I don't know what an "extended Driveshaft" is (other than a euphemism) I certain we only managed the chain.

@jgerry2002 - symptom: when accelerating especially from a stop, the car made a sound like rapid fire small caliber gun or another in the family thought of mechanical farting. From outside the car, the sound emanates from below the drivers seat area (LHD). In reality, the chain is stretched and is skipping over the splines that drive the front wheels. Our was bad enough to be an embarrassment.

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2003 X5 3.0 - Original Owner