Update: I finally installed INPA on my laptop and scanned it. P1093 is equivalent to BMW code 236 which shows up as Oxygen Sensor control upstream bank 2. Any ideas?

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2006 X5 3.0i: Jet Black with Truffle Brown Interior, Auto, Navi, Xenon, Premium
2007 335xi: Black Sapphire Metallic with Black Interior, Manual, Xenon, Premium, Sport, Cold Weather