2002 BMW M3 battery light

Tiny
NRINGER
  • MEMBER
  • 2002 BMW M3
  • 6 CYL
  • 2WD
  • MANUAL
  • 47,000 MILES
The battery light just came on this morning on my drive to work. It filckered for a minute and then came on. I noticed no loss of power nor dimming of my lights etc. The car worked fine otherwise. Do I expect to just need a new battery? Or am I looking at replacing the alternator? If so, how much do I expect to spend on this? Thanks.
Do you
have the same problem?
Yes
No
Friday, September 11th, 2009 AT 8:59 AM

2 Replies

Tiny
IMPALASS
  • EXPERT
Hello -

Well, you may have an alternator problem and the car is running off just the battery so it may soon die. For now when you drive it keep the radio and all other things off.

Please go to Auto Zone (AZ) or O'Reilly's (OR) and for FREE they can pull the codes to the car. Most important: Once they check your codes, if they find something and you don't get it fixed and need to get back with us, please make sure you tell us exactly what the code was, number and all. Example, if the code was E0568 O2 Sensor bad. Then make sure you give us all of that. While there for FREE also they can bring their tester out and check your battery and alternator.

Now I am suggesting to check the codes too, but the main thing here is for free they can check your alternator and battery and how they are working together and separate for free.

My estimate from say a dealer may be about $650 or so and probably $750 to $800 if you need the battery.

If it is an alternator it looks like AZ has one for about $195 and if you need the battery maybe about $140 for that.

My suggestion is get it checked out, let me know what you find out and if this is the problem try to do it yourself and safe a bunch.
Was this
answer
helpful?
Yes
No
Friday, September 11th, 2009 AT 1:24 PM
Tiny
DR. HAGERTY
  • MEMBER
47k is premature for most alternator failures, there may be something else going on there.
Was this
answer
helpful?
Yes
No
Saturday, September 12th, 2009 AT 9:28 AM

Please login or register to post a reply.

Recommended Guides