Try to find one with the least miles possible. These S85B50 engines are notorious for VANOS failures as they approach the 100k mile mark. I myself experienced problems with my transmission after the 50k mile mark and ultimately had to replace the clutch and hydraulic actuator prior to selling the car. To be honest my old E63 M6 is probably my favorite car I've owned but easily was the least reliable.
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2015 BMW i8 in Matte Metallic Grey:
H&R Springs
21" ADV.1 ADVNL2 MV2 CS Wheels
Coming Soon:
2016 BMW M4 GTS De-Winged and Bagged on 22s
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