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      05-04-2015, 08:53 AM   #1
gimpm3
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This can't be good...my dash lit up like a Christmas tree




My car is a 2010 E90 M3 and just started to exhibit indications that the battery is dying (i.e. message on the screen and certain functions not working). I've hooked it up to a battery tender and those issues have since gone away. I'm going to drop it off to the dealer as soon as I can get an appointment.

Anyone have these error messages come up?
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      05-04-2015, 09:34 AM   #2
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why is the fuel reserve light on when you have a full tank
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      05-04-2015, 09:40 AM   #3
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This has happened to me on 3 different BMW's I have owned. On my 550, M3 and X5 and it was all related to battery. Your car is 5 years old and it is a good chance the battery will not hold sufficient charge to fully power all systems to full. The 550 had a bad alternator and the M3 and X5 just worn out batteries due to our unfavorable driving styles. (Short low speed drive times.
The M3 threw a lot of errors when the throttle body actuators wet going but not that many
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      05-04-2015, 09:49 AM   #4
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Quote:
Originally Posted by WingZeroX5 View Post
why is the fuel reserve light on when you have a full tank
Good observation WingZeroX5. One pic is before fill up...the one right after. Literally minutes apart.
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      05-04-2015, 10:01 AM   #5
gimpm3
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Quote:
Originally Posted by MRV99 View Post
This has happened to me on 3 different BMW's I have owned. On my 550, M3 and X5 and it was all related to battery. Your car is 5 years old and it is a good chance the battery will not hold sufficient charge to fully power all systems to full. The 550 had a bad alternator and the M3 and X5 just worn out batteries due to our unfavorable driving styles. (Short low speed drive times.
The M3 threw a lot of errors when the throttle body actuators wet going but not that many
Thanks for your input MRV99...I hope it's just the battery. If it's anything more serious it's a good thing the car still has warranty.
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      05-04-2015, 10:07 AM   #6
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      07-07-2015, 12:59 PM   #7
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Update -

The dealer diagnosed it as faulty throttle actuators. Both were replaced under warranty and she's good to go. Had the battery replaced as well as it was low.
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      07-07-2015, 01:10 PM   #8
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Quote:
Originally Posted by gimpm3
Update -

The dealer diagnosed it as faulty throttle actuators. Both were replaced under warranty and she's good to go. Had the battery replaced as well as it was low.
Phew. Could have been a rod bearing ...
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      07-07-2015, 02:56 PM   #9
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sounds like a potentially expensive dealership visit if it wasn't under warranty. nice.
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      07-07-2015, 03:34 PM   #10
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I want to say there was a very similar post a few weeks ago and it was a faulty battery.
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