Rattle of 2009 BMW X5.
Instead of the commonly suggested workaround of deactivating the control system of the butterfly valve.
This developed over night on my 2002 x5 4.4i auto sport. Its got 135k Miles on it. This sounds gets faster with.
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Are you sure it's a "heat shield" rattle and not the "normal" direct injection cold start sound? BMW direct injection engines tend to make high .