** I now do turbo rebuilds or will buy your car outright! Contact me for inquiries - [email protected] **

BMW N54 twin-turbo engines are notorious for "wastegate rattle." This occurs when the wastegate flapper shaft becomes loose in its bore and doesn't close fully. This video is taken with the turbos out of the engine for clarity.

DIY for rebuilding turbo wastegates: http://www.e90post.com/forums/showthr...

2007 BMW 335xi with 99k miles