Started after the downpipes I believe. I was careful with the sensors marked them so I knew where to put them back in at. I'm picking up a new Bosch bank two sensor from pep boys today. I'll see if it makes a difference. My last car had never ending issues too. Mostly because of a cracked valve cover. This once's brand new so it shouldn't be that. But I might have to smoke test it to make sure
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Black 09 335xi coupe 6MT
Down pipes, Charge Pipe, DCI, JB4, 2 Step, BEF, 3.5 Bar,
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