Does it appear to be coming from the rear edge of the passenger door? Sound more like a resonance issue (a sympathetic vibration rather than the source of the vibration)? If so, it may be related to the door handle hardware. The low RPMs you mention are about the same vibration level as the music I can use to induce the same noise in my car dependably. The fact that when you change the RPMs even a little bit it stops sounds very much like a resonance problem. It is way louder than you'd expect and has a "thick stiff wire buzzing in a bushing" sort of sound to it. Might be the hum you're encountering. I've yet to take the door apart to fix it (I just avoid that CD now

) but it should be an easy fix as it just needs to be modified slightly to change the resonance point.
Quote:
Originally Posted by tifosi00
Hello,
Can anyone help me with this? I have explained it to the dealer numerous times, only for them to tell me they don't hear anything. I have a 2000 base boxster that has been lowered with aftermarket rims. I get a loud humming noise when in either 2 or 3 gear around 3,000 rpm coming from the passenger side. When it starts to happen, if I either rev the engine more or take my foot off the gas it will stop. It has actually been happening for a couple years now, before and after I lowered the car, through 2 different sets of tires, so it's not the tires. I am thinking it's a bearing, but that wouldn't really explain why it goes away when I either step on the gas more or let off the gas.
Any help would be greatly appreciated.
Thanks!
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