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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 06-13-2011, 11:42 AM   #1
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Join Date: Jun 2011
Location: IdaHO
Posts: 5
My Ride: 325XIT

just bought a 2001 325xit 5 speed w/ 160k. Coolant system looks fresh, looks like new parts. Has a wierd harmonic at idle. Goes away with throttle advancement. Sounds like some kind of exhaust vibration. Slight vibration at highway speeds, thinking about tire balance and needs struts/shocks.

A great car and am already in love. What should I look at to really keep it in great shape. Axels, cv joints, ect.? Any advice for a newbie would be great. Thanks

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Old 06-13-2011, 01:14 PM   #2
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Join Date: Oct 2010
Location: Minnesnowta
Posts: 3,672
My Ride: 4cyl of fury
Sounds like your idle control valve needs a cleaning if you are experiencing idle vibration. Also, do you have an auto or manual? The auto box transmission has some weird vibration related to it that I'm not sure was ever resolved. Do some searching.

CV joints/axles would create vibration under acceleration at all speeds, if you aren't experiencing this or are only experiencing it at certain speeds, then I would look more towards tires/wheels.
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Old 06-14-2011, 01:09 PM   #3
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Join Date: Jun 2011
Location: IdaHO
Posts: 5
My Ride: 325XIT
Thanks for the response! It has a 5 speed manual. No vibrations that I detect from cv/axels, still feels like tire balance and need for struts/shocks. The harmonic noise is just at idle and comes and goes. Just shounds like a shroud or cover has comes a little loose, hope that is it. Should I take it to Boise BMW and have them just inspect the car?
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Old 06-14-2011, 02:32 PM   #4
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Join Date: Apr 2011
Location: Brussels, Belgium
Posts: 24
My Ride: '98 Volvo V70 AWD M
At that mileage it probably needs some new engine mounts/bushings. That may account for some of the not-so-good vibrations. Shouldn't be too big of a deal.
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