Quote:
Originally Posted by jgold47
TL;DR
you need a new battery.
BMW's do all kinds of crazy shit when the battery gets low.
good flow chart
is my batter older than 1 year -> yes -> is my car doing crazy shit -> yes -> is my car an i-bus BMW (38/39/46/53) ->yes -> buy a new battery.
For 100 bucks at walmart - start there, then move onto $500 tow's.
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Now that we are back to civilization, the battery has been a steady 12.3-12.4V. It is just another of the many things I plan to check on a regular basis, and especially before a big trip.
The battery is only 18 months old that I replaced due to electrical gremlins which I know well. With this battery, no weirdness of any kind until the failure. There were no weird errors, no hard to start problems, no long cranking to start - NOTHING. Even if there had been a Walmart in the woods with a whole shelf of brand new Group 49 batteries, that would not have fixed the situation without another key.
Next time, I'll take my compact battery charger, spare gel type battery that I have, all my keys, and a shiny new AAA card.