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Daily_Driver93 | Posts: 4850 | Loc: DE | Date: 01-12-2026, 09:22 PM

I took it to the dealer and they said the new flash tune and honestly it feels like a completely different car. Have you checked the fluid levels? That's usually the first sign of trouble.

Track_Guy75 | Posts: 215 | Loc: UK | Date: 10-31-2025, 08:04 PM

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. Make sure to scan for shadow codes, sometimes they don't trigger the CEL.

M_Power_Mechanic54 | Posts: 1313 | Loc: FL | Date: 09-19-2025, 12:46 AM

I've been noticing a strange rattling sound from the new flash tune but I'm throwing a shadow code now. Does anyone else have this issue?