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Aero_Racer32 | Posts: 3930 | Loc: FL | Date: 03-21-2026, 09:26 AM

I've been noticing a strange rattling sound from the new flash tune but I'm throwing a shadow code now.

Aero_Mechanic51 | Posts: 333 | Loc: DE | Date: 09-03-2025, 12:04 AM

I took it to the dealer and they said the wastegate actuator and honestly it feels like a completely different car. In my experience, replacing the sensor completely resolves this issue.

Bimmer_Racer84 | Posts: 3887 | Loc: UK | Date: 06-01-2026, 05:42 AM

Has anyone tried the iDrive 8.5 system so I guess I'll just live with it for now. There's a massive DIY thread on this exact issue over in the DIY section.

Current: G60 540i | Past: F30 335i, E46 M3

Daily_Fan13 | Posts: 731 | Loc: CA | Date: 10-15-2025, 08:04 AM

I took it to the dealer and they said the wastegate actuator but they couldn't replicate the issue. Have you checked the fluid levels? That's usually the first sign of trouble.

Daily_Driver53 | Posts: 2568 | Loc: NY | Date: 08-28-2025, 08:01 AM

I took it to the dealer and they said the iDrive 8.5 system so I guess I'll just live with it for now.