BMW Repair: Chain and bearings on BMW 330i A/T 2007 model, bmw 330i, wheel bearings

Question
After what mileage do I need to change the chain and the wheel bearings on the BMW 330i A/T 2007?

Answer
There isn't a normal mileage interval for either.If you think there is a problem with the chain I would suspect the plastic guides that do wear out but at over 200k.The wheel bearings are a sealed unit and most times it is replaced when it is either noisy or has play at the wheel.