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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #1  
Old 06-23-2013, 05:17 PM
GThg3zx GThg3zx is offline
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Mein Auto: 2004 BMW 330Ci
Replaced Battery... Still Problems?!? Help!

Hey guys - So I was driving my 2004 BMW 330Ci and it started "hesitating"... the battery light (RED) would flash on and off... felt as if the car was going to turn off. I made it to a parking lot and it went dead. I purchased a new battery, replaced it without problem, and drove off. About 5 minutes into the drive it all started happening again...!?! Could it be connected incorrectly? Not tight enough?

Any suggestions/advice I would really appreciate!!!!!!! Thanks!!

Jim
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  #2  
Old 06-23-2013, 05:32 PM
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Fast Bob Fast Bob is offline
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Continuing to drive on a weak/failing battery will sometimes stress the alternator to the failing point. In the E46 Wiki you`ll find a tutorial on using your car`s "hidden" OBD functions to check the electrical system.
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  #3  
Old 06-23-2013, 07:14 PM
GThg3zx GThg3zx is offline
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Thanks Fast Bob - I remounted the connectors and tightened things more this time... Seems to be running fine now... I hope it stays this way!!!!
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  #4  
Old 06-23-2013, 07:41 PM
GoForthFast GoForthFast is offline
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I'll bet you still have problems. Hope not, but don't ignore. Better to find the problem and fix it rather than 'hope'.
Use the OBC hidden func to monitor voltage while driving when you go somewhere.

I think your original problem is partly due to a failing alternator. Unless you had a very loose connection somewhere.

See attached and learn to use function #9
Attached Files
File Type: pdf OBC Hidden Functions.pdf (47.3 KB, 23 views)
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  #5  
Old 06-24-2013, 09:32 AM
GThg3zx GThg3zx is offline
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No continuing problems! As I said earlier I believe the connectors were not tight enough. Drives fine now, but yes I agree GoForthFast... I'll keep my eyes open.
Now I know I need to have my computer reset. I've called a few local shops and is a $60-$80 charge accurate for a simple reset? I'd appreciate your advice guys.

Thanks!!

Jim
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  #6  
Old 06-24-2013, 09:42 AM
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Fast Bob Fast Bob is offline
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Quote:
Originally Posted by GThg3zx View Post
.
Now I know I need to have my computer reset. I've called a few local shops and is a $60-$80 charge accurate for a simple reset? I'd appreciate your advice guys.

Thanks!!

Jim
Bulldinky ! The only thing that needs to be reset is the clock, which you can do yourself in about 10 seconds....
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  #7  
Old 06-24-2013, 10:04 AM
GThg3zx GThg3zx is offline
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Really? ... I've been told by the people who sold me the battery, reading up on this process and others that a computer reset is mandatory after replacing the battery because although it'll seem to work fine, the computer has not registered the new battery and it'll continually push power to make things run correctly... instead of working "normally"...

I'm not saying you're wrong, but now you have me thinking
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  #8  
Old 06-24-2013, 10:29 AM
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Fast Bob Fast Bob is offline
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Originally Posted by GThg3zx View Post
Really? ... I've been told by the people who sold me the battery, reading up on this process and others that a computer reset is mandatory after replacing the battery because although it'll seem to work fine, the computer has not registered the new battery and it'll continually push power to make things run correctly... instead of working "normally"...

I'm not saying you're wrong, but now you have me thinking
Do your homework, Skippy !

E46s do not require "Battery Registration"....
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  #9  
Old 06-25-2013, 05:20 PM
GThg3zx GThg3zx is offline
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...and you're right! A BMW rep came out within minutes and said "Your car doesn't need a battery reset"! What could it be... what could it be It freaked out on me today with RED battery flashes and acted worse than I've experienced since the beginning of this mess... It's at the shop now...

GoForthFast - You called it...! Still problems...
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  #10  
Old 06-25-2013, 10:29 PM
mofunk mofunk is offline
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wow I was gonna say the only thing you need to do is reset the clock. My battery died last week. I had a friend pick me up and we took the battery out the car. I know we were gone for over an hour. Plopped the new battery in, and it started right up. On my car, I didn't have any lights flashing on the dash though. Good luck. I hope it's just something loose
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Old 06-26-2013, 11:38 AM
Tommy D Tommy D is offline
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Mein Auto: '05 BMW 330i
Replaced Battery... Still Problems?!? Help!

My guess is the shop will tell you the alternator needs replacing.


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