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you would have heard it on the forums prior to this....
Did the Dealer test the 02 sensors? I doubt it...
I had significant build up by 52K......
Most BMW dealers know the carbon build up issues on the N54 motors...
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2011 Mineral White M3 ZCP - Opticoat, Ventureshield, some CF, B&B exhaust, AFE Intake Vorsteiner VFF 101s Ohlins
2014 Mineral White 328d Xdrive Wagon - Opticoat, Ventureshield, B8s, H&R, Apex SM-10s Hawk Pads
2021 718 Cayman GT4 - Fire extinguiser
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