The worst situation is if the camshafts are faulty...grooved camshaft bearing ledges causing VANOS codes.
When that happens the camshafts and a bunch of stuffs have to be replaced + labour to replace + labour to reset timing = $$$
Symptom would be misfire + Engine malfunction code + reduce power!
Luckily I had that job completed by BMW through goodwill but that's not guaranteed after warranty is up.
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