ok so I took it to a bmw mechanic who scanned it and the only problem was the mass air flow sensor so I went and bought one and put it on. no result with my current issue. does it take a certain amount of miles or time to learn the new sensor?

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Current= 00' Black E53 4.4i, nav, dsp, Remus exhaust, dice media bridge, AC schnitzer front and rear add-on's, black front grille, etc etc. 92k on the dash