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#1 (permalink) Old 11-30-2004, 09:26 AM
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I just renently bought my wife a clean low mile (100,000) 94 540i. Most everything on the car works but when you put the heat or AC on high there is a slight vibration. Has anyone every experienced this? Also I heard that there is a filter for the system and watned to know where it was located to replace it.

<span style='color:red'>1990 325ic Sliver Sold</span>
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<span style='color:blue'>325i 4door Sliver</span>
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#2 (permalink) Old 11-30-2004, 09:55 AM
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In regards to the vibration. When the AC is on, the aux fan begins to run. This fan is notorious for causing vibrations. Often times it is out of balance and shakes. Check it out and see if any of the blades are chipped or badly scratched.
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#3 (permalink) Old 11-30-2004, 10:04 AM
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I willl check it again but the vibration only happens on High. I would think if it was the aux fan it would be any time the ac is on not only on high.

<span style='color:red'>1990 325ic Sliver Sold</span>
<span style='color:blue'>Love my e30</span>
<span style='color:red'>1999 528i (wifes car)</span>
<span style='color:blue'>325i 4door Sliver</span>
<span style='color:red'>1987 325 is</span>
<span style='color:blue'>2006 f150 Super Crew 6.5' bed (The work horse)</span>
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