Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)

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

Reply
 
Thread Tools Display Modes
  #1  
Old 02-01-2013, 08:26 AM
dvation dvation is offline
Registered User
Location: CT
 
Join Date: Feb 2012
Posts: 8
Mein Auto: 2005 BMW 325xi
Disconnected Cable by Battery

I swapped out the battery on my 05 325xi last night only to find that 1) the previous owner didn't connect the vent on the old battery (yikes) and that 2) there seems to be a cable of some kind that was hanging loose behind the battery and I have no idea what it belongs to.

Any thoughts?
Reply With Quote
Ads by Google
  #2  
Old 02-01-2013, 08:55 AM
SJBimmer's Avatar
SJBimmer SJBimmer is offline
Living Life At The Beach
Location: In This Place
 
Join Date: Feb 2007
Posts: 3,810
Mein Auto: 2004 325 Convertible
Quote:
Originally Posted by dvation View Post
I swapped out the battery on my 05 325xi last night only to find that 1) the previous owner didn't connect the vent on the old battery (yikes) and that 2) there seems to be a cable of some kind that was hanging loose behind the battery and I have no idea what it belongs to.

Any thoughts?
I am almost certain that it connects to the tilt sensor for cars that have the factory alarm.
Reply With Quote
  #3  
Old 02-01-2013, 09:00 AM
dvation dvation is offline
Registered User
Location: CT
 
Join Date: Feb 2012
Posts: 8
Mein Auto: 2005 BMW 325xi
My vehicle doesn't have the factory alarm, does that help to confirm or deny your suspicion?
Reply With Quote
  #4  
Old 02-01-2013, 10:32 AM
Fast Bob's Avatar
Fast Bob Fast Bob is offline
Keeping it surreal
Location: Here, there, everywhere....
 
Join Date: Jun 2004
Posts: 34,362
Mein Auto: 2004 330Ci ZHP 3 pedals
Quote:
Originally Posted by dvation View Post
My vehicle doesn't have the factory alarm, does that help to confirm or deny your suspicion?
It doesn`t "confirm or deny" anything, but don`t lose any sleep over it....BMWs are pre-wired for lots of things that may or may not currently be in your vehicle.
__________________
The road goes ever onward....
(R.I.P. Jever)

*Please support the Wounded Warrior Project*

When faced with choosing between two evils, always go with the one you`ve never tried before....
Reply With Quote
  #5  
Old 02-01-2013, 10:57 AM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,082
Mein Auto: 02 BMW 525i M54 auto 130K
The owner has what looks like the same replacement battery I wrote about for my battery replacement DIY:
- Pictorial discussion of charging, testing, removing, & replacing the bimmer battery



EDIT: Presumably you re-connected the vent.

Here's what reputedly can happen if you don't:

__________________
Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need

Last edited by bluebee; 02-01-2013 at 11:01 AM.
Reply With Quote
  #6  
Old 02-01-2013, 11:21 AM
dvation dvation is offline
Registered User
Location: CT
 
Join Date: Feb 2012
Posts: 8
Mein Auto: 2005 BMW 325xi
Quote:
Originally Posted by Fast Bob View Post
It doesn`t "confirm or deny" anything, but don`t lose any sleep over it....BMWs are pre-wired for lots of things that may or may not currently be in your vehicle.
Great, thanks. Nothing appears to be out of order so I'll just tuck it back in.

Quote:
Originally Posted by bluebee View Post
The owner has what looks like the same replacement battery I wrote about for my battery replacement DIY:

EDIT: Presumably you re-connected the vent.
I did reconnect the vent but didn't take notice on whether I crushed the hose when clamping down the battery - I'll check that now. Thanks for the tip!
Reply With Quote
  #7  
Old 02-01-2013, 04:28 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,082
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by dvation View Post
I did reconnect the vent but didn't take notice on whether I crushed the hose when clamping down the battery - I'll check that now. Thanks for the tip!
Wow. I'm heartened. Someone actually read the link referenced!

Thanks!

Here's a picture from another DIY showing the hose most clearly for that battery in a bimmer.
The danger is the hose can EASILY become crimped by the heavy battery against the fenderwall.
__________________
Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
Reply With Quote
  #8  
Old 02-02-2013, 07:55 AM
G. P. Burdell's Avatar
G. P. Burdell G. P. Burdell is offline
Rambling Wreck
Location: Southeastern U.S.
 
Join Date: Jan 2006
Posts: 1,767
Mein Auto: E46
Quote:
Originally Posted by SJBimmer View Post
I am almost certain that it connects to the tilt sensor for cars that have the factory alarm.
The tilt sensor actually uses a six-pin connector. That's most likely one of the two "mystery connectors" DIYers tend to find. This one was supposedly used to disconnect the battery during shipping. The other is located below the rear seat cushion and was used to monitor the battery condition while the car was shipped from the factory.

Last edited by G. P. Burdell; 02-02-2013 at 09:36 AM. Reason: Left a word out.
Reply With Quote
  #9  
Old 02-02-2013, 08:30 AM
SJBimmer's Avatar
SJBimmer SJBimmer is offline
Living Life At The Beach
Location: In This Place
 
Join Date: Feb 2007
Posts: 3,810
Mein Auto: 2004 325 Convertible
Quote:
Originally Posted by G. P. Burdell View Post
The tilt sensor actually uses a six-pin connector. That's most one of the two "mystery connectors" DIYers tend to find. This one was supposedly used to disconnect the battery during shipping. The other is located below the rear seat cushion and was used to monitor the battery condition while the car was shipped from the factory.
Good to know! Thanks for the info! I tend to believe that alarms are almost useless anyway, so I never installed one in my car.
Reply With Quote
  #10  
Old 02-02-2013, 08:43 AM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,082
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by G. P. Burdell View Post
two "mystery connectors" DIYers tend to find.
Now THAT is interesting!

We have a "mystery connector" in the E39 (inside the driver's side front door) that I've been trying to track down - which might have something to do with the factory.

How DID you find this information out about the 'factory mystery connectors' (which is a new topic to me)?

Is there a list of them somewhere?

__________________
Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
Reply With Quote
  #11  
Old 02-02-2013, 09:40 AM
G. P. Burdell's Avatar
G. P. Burdell G. P. Burdell is offline
Rambling Wreck
Location: Southeastern U.S.
 
Join Date: Jan 2006
Posts: 1,767
Mein Auto: E46
Quote:
Originally Posted by bluebee View Post
How DID you find this information out about the 'factory mystery connectors' (which is a new topic to me)?

Is there a list of them somewhere?
There's no list, but forum members are constantly starting new threads about them. Folks usually find (and post about) the connectors when they change the battery, replace the fuel level senders, or install aftermarket stereo equipment.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E46 (1999 - 2006)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 04:46 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms