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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 10-07-2012, 08:48 AM
rlsmead rlsmead is offline
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Location: vancouver washington
 
Join Date: Oct 2012
Posts: 8
Mein Auto: 2002 bmw 745li
Unhappy help with charging problem

i just bought a 02 bmw 745li about a week ago and it is already turning into a nightmare. love the car its beautiful but im stuck. my battery gets so hot it smell the whole cabin with that acid smell. figured the alternator was overcharging so i put a new alternator in it and the problem is still there. my battery and alternator both test fine and appear to be charging correctly but when i drive more than about 20 miles it seems to be overcharging still. is there any ideas of what problem may be i thought about taking it to bmw but no it will be a several hundred dollar trip and they may or may not find the problem. it seems to charge fine when we test it and battery tests good and dynamic control inactive pops up. the weird thing to me is that yesterday i drove 40 miles and it didnt do it but did it earlier in the day driving 20 miles
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  #2  
Old 10-07-2012, 09:01 AM
chrisrees chrisrees is offline
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Location: Colorado
 
Join Date: May 2012
Posts: 99
Mein Auto: 02 745li
How many miles. Also it is a problematic car, just look at my signature..
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Repairs 2012
wishbone & steering rack
Rfmd hydro steering gea
combination nu
Ball Joint
Tension strut with hydr
Switch unit steering column
Coils 5&7 and new spark plugs
Faulty DSC Control Module
Fuel Gauge
Leaking Crank Case Vent Valves
Power Steering pump, washer pump and grommont,
Crank Shaft position sensor
Total $13,481.37 in one year my mechanic swears all these parts are re engineered to work better than the originals lol
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  #3  
Old 10-07-2012, 09:03 AM
rlsmead rlsmead is offline
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Location: vancouver washington
 
Join Date: Oct 2012
Posts: 8
Mein Auto: 2002 bmw 745li
i read yours and really wish i would have put a little more thought into it before buying it has 108,000
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  #4  
Old 10-07-2012, 09:09 AM
chrisrees chrisrees is offline
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Location: Colorado
 
Join Date: May 2012
Posts: 99
Mein Auto: 02 745li
Quote:
Originally Posted by rlsmead View Post
i read yours and really wish i would have put a little more thought into it before buying it has 108,000
I would highly recommend getting an extended warranty through carchex. Those repairs below were covered by the warranty. including when my tranny goes out soon which tends to go out around 80,000 miles.
__________________
Repairs 2012
wishbone & steering rack
Rfmd hydro steering gea
combination nu
Ball Joint
Tension strut with hydr
Switch unit steering column
Coils 5&7 and new spark plugs
Faulty DSC Control Module
Fuel Gauge
Leaking Crank Case Vent Valves
Power Steering pump, washer pump and grommont,
Crank Shaft position sensor
Total $13,481.37 in one year my mechanic swears all these parts are re engineered to work better than the originals lol
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  #5  
Old 10-07-2012, 09:11 AM
rlsmead rlsmead is offline
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Location: vancouver washington
 
Join Date: Oct 2012
Posts: 8
Mein Auto: 2002 bmw 745li
how long have you had yours 13k in a year thats sad i didnt pay that for the cari will be in a world of hurt if repairs end up half that my alternator was $1000
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  #6  
Old 10-07-2012, 09:12 AM
rlsmead rlsmead is offline
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Location: vancouver washington
 
Join Date: Oct 2012
Posts: 8
Mein Auto: 2002 bmw 745li
what do the warranty's run $$
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  #7  
Old 10-07-2012, 09:13 AM
chrisrees chrisrees is offline
Registered User
Location: Colorado
 
Join Date: May 2012
Posts: 99
Mein Auto: 02 745li
I've had mine since January, it's been in the shop every month except October (because I wont drive it this month) and July. I'll have a brand new car by mid next year as all components should be changed by then. Serious extended warranty for 208 a month for 18 months to get full coverage for 4 years isn't a bad investment.
__________________
Repairs 2012
wishbone & steering rack
Rfmd hydro steering gea
combination nu
Ball Joint
Tension strut with hydr
Switch unit steering column
Coils 5&7 and new spark plugs
Faulty DSC Control Module
Fuel Gauge
Leaking Crank Case Vent Valves
Power Steering pump, washer pump and grommont,
Crank Shaft position sensor
Total $13,481.37 in one year my mechanic swears all these parts are re engineered to work better than the originals lol
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  #8  
Old 10-07-2012, 09:14 AM
Khabar Khabar is offline
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Location: Virginia
 
Join Date: Mar 2009
Posts: 574
Mein Auto: 745i 2005
check if vent tube on battery maybe it is bad and make sure u have right battery AGM possible that previous owner could install wrong type of battery.
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  #9  
Old 10-07-2012, 09:20 AM
wayne86 wayne86 is offline
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Location: CA
 
Join Date: Sep 2012
Posts: 40
Mein Auto: 7 series, '08
Quote:
Originally Posted by rlsmead View Post
what do the warranty's run $$
3-4K. But be aware, youll only get a max payout of the warranty based on the value of the car when you get the warranty. In your case max payout might be only $7K based on NADA Guide. Thats said, if you get more then you pay for the warranty it probably worth it for these cars. Review the Carchex warranty contracts they have online and read the fine print and call them to be clear on what is covered and the limits of payout. Im sure they would not cover preexisting problems. Also you have to wait like 30-60 days before the warranty takes effect......this to help limit people from claiming preexisting problems on the warranty.
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  #10  
Old 10-07-2012, 09:22 AM
rlsmead rlsmead is offline
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Location: vancouver washington
 
Join Date: Oct 2012
Posts: 8
Mein Auto: 2002 bmw 745li
i checked it and it hadnt been hooked up but that still doesnt make sense for it to get so hot. and it is a bmw battery i believe it is agm
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  #11  
Old 10-07-2012, 09:40 AM
Khabar Khabar is offline
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Location: Virginia
 
Join Date: Mar 2009
Posts: 574
Mein Auto: 745i 2005
change the battery and register it first
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  #12  
Old 10-07-2012, 09:48 AM
First_745Li's Avatar
First_745Li First_745Li is offline
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Location: South FL
 
Join Date: Jun 2012
Posts: 2,216
Mein Auto: '03 745Li
Quote:
Originally Posted by Khabar View Post
change the battery and register it first
+1
Since you changed the alternator already, like Khabar said, I would change the battery and have it registered (very important part). Maybe the previous owner failed to do so which can result in over/under charging and reducing the life of the battery. You can get the batteries online for around $200-$250. Then find a good independent shop (aka INDY) to register it.
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'07 Audi A8 (w/ 20,000 miles)
'03 745Li (sold)
'03 Acura TL-S
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  #13  
Old 10-07-2012, 09:49 AM
chrisrees chrisrees is offline
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Location: Colorado
 
Join Date: May 2012
Posts: 99
Mein Auto: 02 745li
Quote:
Originally Posted by wayne86 View Post
3-4K. But be aware, youll only get a max payout of the warranty based on the value of the car when you get the warranty. In your case max payout might be only $7K based on NADA Guide. Thats said, if you get more then you pay for the warranty it probably worth it for these cars. Review the Carchex warranty contracts they have online and read the fine print and call them to be clear on what is covered and the limits of payout. Im sure they would not cover preexisting problems. Also you have to wait like 30-60 days before the warranty takes effect......this to help limit people from claiming preexisting problems on the warranty.


They valued mine at 17,000 you can ask before you purchase.
__________________
Repairs 2012
wishbone & steering rack
Rfmd hydro steering gea
combination nu
Ball Joint
Tension strut with hydr
Switch unit steering column
Coils 5&7 and new spark plugs
Faulty DSC Control Module
Fuel Gauge
Leaking Crank Case Vent Valves
Power Steering pump, washer pump and grommont,
Crank Shaft position sensor
Total $13,481.37 in one year my mechanic swears all these parts are re engineered to work better than the originals lol
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  #14  
Old 10-07-2012, 09:56 AM
rlsmead rlsmead is offline
Registered User
Location: vancouver washington
 
Join Date: Oct 2012
Posts: 8
Mein Auto: 2002 bmw 745li
ill put a new battery in today and see where that puts me i suppose. hopefully i can get it worked out iv never owned a bmw and this is such an odd problem
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  #15  
Old 10-07-2012, 09:59 AM
Khabar Khabar is offline
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Location: Virginia
 
Join Date: Mar 2009
Posts: 574
Mein Auto: 745i 2005
register it also otherwise no point of replacing it.

Last edited by Khabar; 10-07-2012 at 10:00 AM.
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  #16  
Old 10-07-2012, 10:00 AM
rlsmead rlsmead is offline
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Location: vancouver washington
 
Join Date: Oct 2012
Posts: 8
Mein Auto: 2002 bmw 745li
ya ill do that for sure. maybe its as simple as that. hoping that fixes it
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  #17  
Old 10-07-2012, 10:02 AM
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First_745Li First_745Li is offline
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Location: South FL
 
Join Date: Jun 2012
Posts: 2,216
Mein Auto: '03 745Li
Quote:
Originally Posted by rlsmead View Post
ill put a new battery in today and see where that puts me i suppose. hopefully i can get it worked out iv never owned a bmw and this is such an odd problem
Putting it in is 1/2 the task, you need to get it registered. My 7 is my first BMW as well. When I first bought it, it needed a battery. I have to admit this forum does scare the newcomers but also is a big help. I come here everyday, for a laugh, chime in with my two cents, or for help. Either way the folks here are awesome always willing to help. I would like to welcome you and together we all get thru our "issues" together.
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'11 328i
'07 Audi A8 (w/ 20,000 miles)
'03 745Li (sold)
'03 Acura TL-S
'02 Infiniti QX4 (sold )

For those like that love INK checkout join
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  #18  
Old 10-07-2012, 10:06 AM
rlsmead rlsmead is offline
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Location: vancouver washington
 
Join Date: Oct 2012
Posts: 8
Mein Auto: 2002 bmw 745li
absolutely i been reading for about an hour thinking i bought a 5,000pound beautiful paperweight but this is allot of help do you no the difference in the agm battery and the typical
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  #19  
Old 10-07-2012, 10:56 AM
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First_745Li First_745Li is offline
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Location: South FL
 
Join Date: Jun 2012
Posts: 2,216
Mein Auto: '03 745Li
AGM is more stronger, durable, better for power hogs (like our 7's).. I'll have to look for a better description.
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'11 328i
'07 Audi A8 (w/ 20,000 miles)
'03 745Li (sold)
'03 Acura TL-S
'02 Infiniti QX4 (sold )

For those like that love INK checkout join
Myinkedspace.com with my referral code and enjoy

http://myinkedspace.com/?ref=REF65900
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