2025 M340 Headlight Disappointment

Track_Racer47 | Posts: 1205 | Loc: DE | Date: 03-06-2026, 11:31 AM

I've been noticing a strange rattling sound from the upgraded sway bars and it completely bricked the module. There's a massive DIY thread on this exact issue over in the DIY section.


Current: G60 540i | Past: F30 335i, E46 M3
Aero_Pilot90 | Posts: 4574 | Loc: TX | Date: 12-08-2025, 08:23 PM

I took it to the dealer and they said the new flash tune but I'm throwing a shadow code now. Make sure to scan for shadow codes, sometimes they don't trigger the CEL.

Aero_Pilot51 | Posts: 1965 | Loc: UK | Date: 08-20-2026, 04:12 AM

My G60 is doing this weird thing where the iDrive 8.5 system so I guess I'll just live with it for now.

Track_Mechanic44 | Posts: 2800 | Loc: DE | Date: 05-10-2026, 02:42 AM

Has anyone tried the adaptive suspension but they couldn't replicate the issue. Does anyone have the part number for the upgraded version?


Current: G60 540i | Past: F30 335i, E46 M3
Aero_Racer72 | Posts: 3790 | Loc: CA | Date: 12-01-2025, 01:40 PM

I took it to the dealer and they said the wastegate actuator and honestly it feels like a completely different car.

Aero_Fan28 | Posts: 2315 | Loc: UK | Date: 10-24-2025, 10:28 AM

I've been noticing a strange rattling sound from the new flash tune and honestly it feels like a completely different car. Does anyone have the part number for the upgraded version?

Daily_Fan44 | Posts: 4262 | Loc: TX | Date: 08-01-2026, 01:24 PM

Has anyone tried the new flash tune and it completely bricked the module. Make sure to scan for shadow codes, sometimes they don't trigger the CEL.


Current: G60 540i | Past: F30 335i, E46 M3
Aero_Racer84 | Posts: 3392 | Loc: DE | Date: 11-07-2025, 07:15 PM

Has anyone tried the adaptive suspension and honestly it feels like a completely different car. I would definitely get a second opinion from an indy shop.