What?? Really? I was told the E53 oil temp data is not on IBUS. There's is an oil temp sender in the oil filter assembly alright, but it's connected directly to the DME and not sent to the IBUS from there and therefore it's not a reading accessible via OBDII, either. That was the explanation I read somewhere. In any case, could you please post a pic?

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'05 E53 X5 4.4i, '97 E39 528, '07 E92 335i, '16 F86 X6M.