Quote:
Originally Posted by Master Deep
Most modern regular production cars should be able to go 2-3 weeks and still start up.
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"Should be able," is right.
The car did actually start (slowly) despite this problem, which was amazing since the car didn't have enough juice to even maintain the clock time setting.
What is the official cutoff off point of a problem or not a problem? Is this up to the dealer's subjective opinion?
The battery may be failing, but I think it's also possible that the car's "systems" are drawing too much power while the car is off or not shutting down fast enough after the car is turned off and that may be what needs to be fixed.
If the car is so smart that it has all the these computer systems that need to "go to sleep," or else they will drain out all the battery power, then it should also have one that monitors the battery or monitiors how many minutes have passed since the car was turned off and forces everything drawing power to power off before the battery charge gets too low.
If it's only the battery failing prematurely, then that would be a quick fix.
They would have to look at the car to test this, but if it takes 5 or 6 days for it to drain, I'm not sure if they will do that.
In case this is normal, are there aftermarket batteries that fit in the designated space in the e90 that have significantly more reserve power than the stock BMW battery?