2002 BMW X5 WHISTLING NOISE AND BATTERY

  • Tiny
  • Michelleva
  • 2002 BMW X5

Engine Performance problem
2002 BMW X5 6 cyl All Wheel Drive Automatic 80500 miles

Hello,

I just replaced the battery in my 2002 BMW X5. After sitting overnight, it would not start. Jumped the vehicle and it started but barely. It is also making a whistling noise when the engine revs.

A friend suggested it might be the alternator because it is still sluggish in starting.

Thank you for your help.

Sunday, January 18th, 2009 AT 5:01 PM

1 Answer

  • Tiny
  • Dr. Hagerty
  • Expert
  • 9,705 posts

Your friend is possibly correct. Check the voltage at the battery and lift the hood and listen for the whistling noises source. Battery voltage should be about 13.8 - 14.2 volts with the engine running and the lights on.

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Monday, January 19th, 2009 AT 4:52 PM

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