Can't answer your specific question, but I put an Android head unit in my wife's Toyota... Also thought the same, for £9 I can get OBD info on the screen. Bought the Bluetooth thing, plugged it in and the engine started spluttering, idling rough.
I'm sure you can get them to work properly, but I didn't think it would affect the engine's ECU. So I binned it.
And relieved when everything went back to normal.
. Cheers, Greg
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2011 Vogue SE 4.4 with lots of toys in Stornaway
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