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It is my understanding that BMW began using the N55 engine in the 2011 model year 1s, but I'm not certain of that. You don't know what model year your car is?
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2009 BMW LeMans Blue 135i/Dinan Stage 2 software upgrade/Alufelgen SF-71s/M3 suspension pieces/Koni Sport adjustable dampers/ETS FMIC
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