Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-04-2019, 08:33 AM
Member
 
Join Date: Apr 2019
Location: Buffalo
Posts: 29
E53blue4.8is is on a distinguished road
Bad alternator or battery???

Hey guys, I have a 2006 4.8is that I've had for a couple of months. Its had an intermittent issue that when driving all of a sudden, the dsc off, 4x4, and brake lights come on all at once. The radio screen would also go blank and I'd lose radio sound too. After all that, it would kick into trans failsafe mode. It's been starting to do it pretty every time I drive now. And if I shut it off while the lights are on, the battery is dead and I'll have to jump it. I'm not sure if it's the alternator that isn't charging, or there's a bad cell in the battery or something. Both were new in November and only have about 5000 miles on them. The previous owner had them installed at a midas location. Thoughts??
Reply With Quote

Sponsored Links

  #2  
Old 07-04-2019, 08:39 AM
EODguy's Avatar
Member
 
Join Date: Jun 2018
Location: Saudi Arabia/Philippines/USA
Posts: 881
EODguy is on a distinguished road
What does your hidden menu say that voltage is while running?

Sent from my SM-A730F using Tapatalk
__________________
"When the Team Chief said.... You're trapped in a hole with nothing but a goat and a slinky, what do you do? Stubby said, I'm not sure but it won't end well for the goat...." ~(Overheard) Last day, Phase 3, Q Course
Reply With Quote
  #3  
Old 07-04-2019, 08:55 AM
Member
 
Join Date: Apr 2019
Location: Buffalo
Posts: 29
E53blue4.8is is on a distinguished road
It doesn't stay on long enough to tell. It always kicks off to tell me myself leveling air suspension is inactive.
Reply With Quote
  #4  
Old 07-04-2019, 10:45 AM
crystalworks's Avatar
Member
 
Join Date: Jun 2014
Location: SA, TX
Posts: 3,919
crystalworks is on a distinguished road
Alternator. And if the battery has been flat multiple times without being trickle charged back up... it might be dead again too. Midas probably used a rebuilt or aftermarket alternator that isn't performing.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
Reply With Quote
  #5  
Old 07-04-2019, 10:56 AM
Member
 
Join Date: Apr 2019
Location: Buffalo
Posts: 29
E53blue4.8is is on a distinguished road
That's what I was figuring too. Just wanted other people's input before i dropped the money on it since they aren't cheap.
Reply With Quote
  #6  
Old 07-04-2019, 11:30 AM
crystalworks's Avatar
Member
 
Join Date: Jun 2014
Location: SA, TX
Posts: 3,919
crystalworks is on a distinguished road
Quote:
Originally Posted by E53blue4.8is View Post
That's what I was figuring too. Just wanted other people's input before i dropped the money on it since they aren't cheap.
Monitoring your voltage is the best way to definitively diagnose it. But that's my guess and where I'd put my money.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
Reply With Quote
  #7  
Old 07-05-2019, 12:00 AM
Member
 
Join Date: Oct 2011
Location: NYC
Posts: 4,735
SlickGT1 is on a distinguished road
I don’t know. Mine was voltage regulator. Like $40 from bmw. Car was doing some
Stupid shit too. Trans failsafe, susp inactive, brakes light would turn on. Navi reboot. Guess what. Overvoltage. Not Under voltage.

I would scan it. Inpa will pick up a code if it’s low bat or over voltage.
__________________
2006 4.8is, Black on White.

"The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain

Unlock OBC post 5
Reply With Quote
  #8  
Old 07-05-2019, 08:40 AM
Member
 
Join Date: Apr 2019
Location: Buffalo
Posts: 29
E53blue4.8is is on a distinguished road
Quote:
Originally Posted by SlickGT1 View Post
I donít know. Mine was voltage regulator. Like $40 from bmw. Car was doing some
Stupid shit too. Trans failsafe, susp inactive, brakes light would turn on. Navi reboot. Guess what. Overvoltage. Not Under voltage.

I would scan it. Inpa will pick up a code if itís low bat or over voltage.
You don't happen to have a part number, do you?
Reply With Quote
  #9  
Old 07-05-2019, 10:31 AM
crystalworks's Avatar
Member
 
Join Date: Jun 2014
Location: SA, TX
Posts: 3,919
crystalworks is on a distinguished road
Quote:
Originally Posted by SlickGT1 View Post
I donít know. Mine was voltage regulator. Like $40 from bmw. Car was doing some
Stupid shit too. Trans failsafe, susp inactive, brakes light would turn on. Navi reboot. Guess what. Overvoltage. Not Under voltage.

I would scan it. Inpa will pick up a code if itís low bat or over voltage.
It probably is the VR. When mine failed it would have both under and over voltage issues. I consider a VR failure an alternator failure and just replace the whole thing but, like yourself, many here have just replaced the VR and been back in business.
__________________
2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)


2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)
Reply With Quote
  #10  
Old 07-05-2019, 10:55 AM
andrewwynn's Avatar
Member
 
Join Date: Jun 2015
Location: Racine, WI
Posts: 4,831
andrewwynn is on a distinguished road
i rebuilt my alternator with a $20 kit (for Valeyo). vs $325 for whole alternator.
__________________
E53 / M54 2001 3.0i gas LHD (pair of them: his & her)
Reply With Quote
Reply

Bookmarks

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 06:30 AM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.