BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      05-25-2015, 01:28 PM   #133
wnta135
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May 08 build, 104K, original battery.
I'm looking here trying to figure out how long I shoulg go.
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      05-25-2015, 02:18 PM   #134
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Replace it now. Mine lasted 6 1/2 years and still started OK. But the dash computer started acting goofy. Your due.
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      06-21-2015, 07:19 AM   #135
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Well im still on the original battery 08 135i but today even though it was plugged into a tender it would barely crank but it started. Then after a few miles i let it idle and then it started to misfire and then I turned it off and then it would not crank anymore. Seems like if I let it idle it would discharge. Is this a sign that the battery is going south? Same with my 08 128 feels like cranking is weak this too has the origiinal battery.
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Last edited by Guam135i; 06-22-2015 at 03:33 AM.
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      06-21-2015, 09:34 PM   #136
avosough
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Original battery '08 with 59000 miles.
Car starts fine but every couple of days will show a DSC/brake failure control message for ~3 seconds on first start. I also have a stumbling idle that comes up about once a week when stopped and in neutral that I can't routinely repeat.

According to the hidden menu my voltage when driving for about 30 minutes is 12.8 - 13.0 V. Is it worth replacing my battery preemptively? I've heard voltage while running should be 14.5 V or so...
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      08-07-2015, 04:31 PM   #137
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Original '08 107K here. I use a tender if it sits for more than 3-5 days. No issues thus far, knock on wood.

Personally, I'm gonna milk it for as long as it'll go as I have the tool to register a new one when that time comes, and I have another car to use in the interim.

If this is your only car and/or you need to rely on it for a long trip, maybe it's time to replace it. But if you can deal with a no-start one day and replace it pretty quick, I'd run it till it dies.

That's just me though.
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      08-08-2015, 11:38 AM   #138
spfdenhugh
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I am still on the original. 2/08 build and 43k miles. As you can surmise, it is not driven daily and may sit for 2 weeks or more and starts up every time. My e46 went thru 3 batteries in 7 years. Either their supplier has improved or perhaps BMW electronics are better.
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      08-08-2015, 02:17 PM   #139
bmw1racer
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Quote:
Originally Posted by spfdenhugh View Post
Either their supplier has improved or perhaps BMW electronics are better.
Maybe neither: My 2012's battery tanked after three years, while my E36 went through two batteries in 18 years.
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      08-30-2015, 09:58 PM   #140
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'08 with original battery 110000 miles so far
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      08-30-2015, 10:15 PM   #141
PA135i
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Mine went at 88K after 6 1/2 years back in January. The battery still started the car fine but the computer was displaying incorrect infomation. Dealer tested it and the voltage was low and was causing the problem. But, 6 1/2 years is not bad even if the battery and install was $400 at the dealer.
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