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07-15-2009, 05:39 AM | #1 |
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Battery flat............
Since getting the M3 I have hardly driven the 135i over the last 3 weeks (once in fact - about a week ago). Anyway, jump in there today to blow out the cobwebs and up comes the "battery low" warning and then the time and date resets.
Something must be drawing a bit of power when the car is "dormant" - certainly enough power to drain the battery after a week or two. |
07-15-2009, 05:47 AM | #2 |
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07-15-2009, 05:49 AM | #3 |
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Yes that doesn't sound right. Should be able to sit idle for a lot longer than that. Maybe you might have a dud battery.
BTW I would be unfaithful to my 1er as well if I had a M3 mistress
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07-15-2009, 06:04 AM | #4 |
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Back in 1990 I had an '86 Magna that sat idle for 5 months (thanks mum and dad ) while I went to Europe. When I got home it started first time....but it had awesome flat spots on the tyres!!
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07-15-2009, 06:11 AM | #5 | |
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I agree. Have just come back not too long ago from a month long trip and the 135 started up first go! |
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07-15-2009, 06:13 AM | #6 |
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My neighbour purchased a new 320i sedan about 4 months ago, drove it around for 1 week, and hasn't driven it for the past 4 months..Its parked alongside my 1er in the carpark absolutely covered in dust...
Be interesting to see if it starts on his return from China, whenever that is.. |
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07-15-2009, 06:14 AM | #7 | |
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I find that in my X5 if I forget to lock the car then after 1 week of not driving it there would be a high battery drain message. As I understand it, if you do not lock the car then the ECU will not shut down fully. I also find that the CD/DVD drive would mysteriously start spinning at random intervals as well. If I lock the car then there seems to be no problems. Have you experimented with this? |
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07-15-2009, 06:16 AM | #8 | |
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Another story: When my previous Land Rover was about 3 months old, my car would occasionally fail to start for no reason at all. Turned out that it was a dud battery installed at the factory. So maybe that's what you've got
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07-15-2009, 07:35 AM | #9 |
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I'm sure X5mad is one the right track. I have had problems with the battery in my E91 and the dealer has asked me to make sure I lock the car at night so it can 'go to sleep'. I assume it could be worse if you have comfort access and leave the key within range of the car.
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07-15-2009, 08:48 AM | #10 | |
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Whilst on the topic of batteries and charging, I was under the impression that when you drive a car the battery re-charges. Is this so or do you have to drive from Perth to Sydney to top up a flat battery??!! |
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07-15-2009, 04:47 PM | #11 |
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ank2912, just curious. Do you have Comfort Access? I wonder if that feature has to keep 'polling' (ie checking to see if the key fob is in range) when the car is parked (locked or unlocked) and potentially put a drain on the battery over time?
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07-15-2009, 04:52 PM | #12 | |
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BMW also replaced my battery with a larger one and reprogrammed the car so it would start charging at a lower temp.... thus far no issues. |
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07-15-2009, 04:55 PM | #13 | |
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Last edited by BMW86; 07-15-2009 at 07:33 PM.. |
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07-15-2009, 07:04 PM | #14 |
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If BMW's after sales is a good a Lexus you should get a new battery. My wife had a Lexus for just under 4 years when the battery died, they replaced it under warranty. Good thing as the genuine battery was about $900.
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07-15-2009, 07:19 PM | #15 |
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my MY02 WRX was the worst ... with the keypad immobiliser thing it had the battery would be dead after about 2 days of not driving it. I used to have to keep a jump charger battery kit in the boot! saved me a few times.
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07-15-2009, 07:25 PM | #16 | |
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07-15-2009, 08:06 PM | #17 |
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I recently went away for two months to South America. During that time, my 135i was parked at home. Dad took it out once just over a month into my holiday and it started just fine. When I came home, a month later, it also started fine. Sounds like something wrong with your battery.
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07-15-2009, 08:30 PM | #18 | |
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The battery was charged overnight and when I restarted it there was no "Battery Low" warning. I'll lock it this time and see what happens. BTW - When I leave the car unlocked the key fob is not left in the socket. If I get another flat battery issue I'll just get BMW Roadside Assistance to sort it out - maybe they'll put in a new battery.... |
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07-15-2009, 08:32 PM | #19 |
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But..... when you got home the tyres were bald.
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07-15-2009, 09:44 PM | #20 | |
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BTW, does anyone have a problem with their seats not reclining all the way
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07-15-2009, 11:30 PM | #21 |
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TimMc does your car have comfort access? This has to be active even when the car is locked and it is always 'looking' for a key. I am sure this has something to do with the problem.
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07-15-2009, 11:51 PM | #22 |
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yee ole mans new SS had a "software" issue where it would keep the computer running while it was turned off and would cuase the battery to drain overnight.
a quick firmware upgrade and it was all good :P the ss seats didnt recline all the way though, going to have to ask the dealer about that.
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