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2001 BMW 740

Tiny
S NICHOLS
  • MEMBER
  • 2001 BMW 740
  • V8
  • 2WD
  • AUTOMATIC
  • 86,000 MILES
Since I replaced the battery(was dead for 6 mos.) As soon as I turn the key(to ACC or run position), a very loud deep hum is heard through the speakers. Nobody I talked to has ever heard of this befors, even our dealer. They want to see the car for a diagnostic check. Can anyone shed some light on this for me? When I parked the car 6 mos. Ago, all was quiet. Thanks
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Tuesday, March 17th, 2009 AT 11:06 AM

1 Reply

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
I have had these issues with E-38 cars in the past, it sometimes shows up as a faulty amplifier, the battery dying probably had nothing to do with it. The fault is an internal issue and requires replacement.
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Tuesday, March 17th, 2009 AT 2:16 PM

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