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      09-17-2012, 04:15 PM   #1
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330i not starting - battery issues?

Was hoping I'd never have to post on any forum to say my car won't start

I've had the "low battery" warning quite often since I bought the car in June. It's not a daily driver and had been parked up in the garage for 7 days before I tried to start it on Sunday morning - it's last trip out had been a good 150miles+ run. I'd been in and out of the car since then testing various USB sticks and I (now) guess that drained the battery.

Car wouldn't start on Sunday - it turned over very slowly then died completely. Further pressing of the starter button produced nothing.

I stuck my trickle charger on and left it til tonight (approx 36hrs). Tried again. It's now turning over (sounding reasonably healthy) but failing to catch/start. I have to press the starter button again to stop it turning over, and that coincides with/brings up DSC/ABS failure messages on the screen.

Please tell me it's not totally f**ked!

I tried locking it, leaving it for an hour with it back on trickle charge (it's all I have), then trying again but it's the same result - no start and DSC/ABD failure messages.

I'm picking up a new battery tomorrow and hoping it'll start OK tomorrow with that, but I'm very concerned it's something worse - electrical? Please reassure me it's not?!!?

Any advice/suggestions welcome. Car is a 2007/57 330i 258ps manual. Stupidly I don't have any breakdown cover at the moment...
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      09-17-2012, 04:21 PM   #2
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Sounds like it's the battery that's screwed. Low batteries can often cause the other electronic systems to go haywire so i really wouldn't worry about the DSC/ABD failure messages just yet.

If you put in a brand new, charged battery tomorrow and it still does the same thing - then it's time to worry In all honesty though, it sounds like the battery has been on the way out for a while and the cells are slowly degrading to the point where it just can't hold charge any more. A bit like when the battery on your laptop becomes crap after a few years. Start up places a lot of stress/load on the battery, so it is the most likely time for the battery to show it's weakness and fail.
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      09-19-2012, 03:20 PM   #3
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Thanks for your suggestion.

But no joy

Replaced battery tonight, still won't start. Engine turns over normally upon pressing the start button, but it just fails to start. Fuel pump appears to come on (I guess that's the humming noise you hear when you switch on the ignition). I suspect electrical...

The first time it failed to start (at the weekend when I first discovered this problem...) could the low charge left in the battery have created any knock-on problems for the electrical systems?

Any suggestions where to start?
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      09-19-2012, 03:34 PM   #4
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If you have breakdown cover, maybe call them out and see if they can get if going/ identify the issue?
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      09-19-2012, 03:36 PM   #5
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Quote:
Originally Posted by gchild View Post
If you have breakdown cover, maybe call them out and see if they can get if going/ identify the issue?
Don't have any at the moment - lapsed without me realising...
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      09-20-2012, 07:44 AM   #6
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Nobody at all?

Please, even if you just have suggestions I'd be keen to hear them so that I can investigate. I'm totally at a loss here without a working vehicle other than my bicycle (and yes, it's raining today...)
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