Quote:
Originally Posted by TheDurk
Again, BMWs are where that problem is. The cig plugs are always hot. I had an inverter that would kill a BMW battery fast if left connected.
The BAFX definitely does constitute a parasitic drain. The OBDII plug power pin is always hot. I have left mine in for extended period of time, but never without driving every few days. It would be easy enough to measure if anyone really needed to know.
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I have noticed that my girlfriend's BMW Z3 Roadster battery will drain down after sitting for around 3 weeks and it happened on a very new battery because I replaced it not too long before leaving for a trip. It could have a parasitic draw somewhere but I need to see if she keeps anything plugged into the cigarette plug. My 4runners can sit for that long no problem without totally draining the battery.
