BMW Turbo Charger Rattle Problems N54 Engine (BMW Extended Warranty For Turbo's)
This video has an example of a turbo charger that is rattling so you can hear the noise and includes some diagnostic checks you can perform to determine if your N54 engine has this problem. BMW has increased the warranty on turbo chargers to 8 years 82,000 miles on all N54 engines which would be on the 135, 335, and 535 vehicles.
This video also shows a turbo and demonstrates one failure of the pivot bearing causing the rattling.
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