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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 02-08-2011, 12:43 AM   #1
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Join Date: Apr 2010
Location: Missouri
Posts: 460
My Ride: 2002 330xi

Unfortunately i am having a couple problems with my 330xi again. I think i know what the solution is on some of them, but would like some input. First i have noticed my ride getting harsher and more bouncy after a bump. Also, when i get to the end of my driveway when backing out, when my front left tire goes down the bump there is kind of a clunk. Am i in need of new suspension? Also, i have noticed that sometimes when i first let off the brake it kind of grinds/clunks as well, suspension or brake issue? Another thing i have noticed is i have been idling extremely low, ie about 500 rpms? In addition i cant glide as well or when im going really slow speeds like backing out of parking spots i have to use my gas a lot more. I used to not have to at all. Hopefully its just the cold weather, but unfortunately i rather doubt it. Still having the whistlng problem, havent gotten a chance to try anything to fix that because of the weather. Last thing, in need of new tires very soon. The continental extreme contace are highest on my list but would love peoples input (yes i have read many reviews on here but would like the opnion of xi's because ours are very different)
Tia for the info
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Old 02-08-2011, 12:46 AM   #2
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Join Date: Apr 2010
Location: Missouri
Posts: 460
My Ride: 2002 330xi
Forgot to add that i have about 75500 miles on the car and i believe original shocks and possibly belts, dont know for sure on the belts
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Old 02-08-2011, 11:35 AM   #3
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Join Date: Oct 2010
Location: Bloomington, IN
Posts: 75
My Ride: 2004 325iT SMG1
Same Clunking in my XI, only front right. I just pulled the wheel off last night and checked everything, seems that everything is tight and right, must be the strut as I have 100K now.
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Old 02-08-2011, 12:06 PM   #4
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My Ride: 2003 325xi
Jack up the wheels and shake them to check all the ball joints.

Bouncy ride sounds like struts- push down on each corner a few times to see if they rebound ok.

Clunking is probably ball joints or sway bar end link.

Low idle could be a lot of things- how is your gas mileage? I would search for the videos that show you how to check the DISA valve.

The AC and serpentine belt should probably be changed- check the inside for small cracks in the grooves. I would throw a waterpump and possibly a thermostat at it with new belts and change your coolant as well. brake fluid and the 4 driveline fluids should be changed too.

Last edited by Kubica; 02-08-2011 at 10:17 PM.
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Old 02-11-2011, 07:18 PM   #5
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Join Date: Apr 2010
Location: Missouri
Posts: 460
My Ride: 2002 330xi
thanks for all the info, my gas mileage has dropped, but i know that that is also due to the cold weather. and im planning on getting new belts, just havent had the time or weather to do it.
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Old 02-11-2011, 09:19 PM   #6
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Location: Madison, AL
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My Ride: 2001 330xi
I had similar issue with some clunk/rattle pulling out of driveway and going over small bumps. Replaced the sway bar links and that care of the issue.
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Old 02-12-2011, 11:43 PM   #7
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Location: Beavercreek, OH
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My Ride: '01 330xi
For the low idle, check that your O2 sensors are functioning properly, check for air leaks, and do vanos seals if they've never been done.

When my fuel economy tanked (15 mpg driving conservatively), I did all this and I cleaned the DISA, fixed the air leak around the DISA, cleaned the ICV, and the throttle body. Collectively, all of that fixed my low idle / bouncing idle / rough idle and got my fuel economy back where it needed to be.
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Old 02-16-2011, 03:21 AM   #8
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Old 02-16-2011, 12:37 PM   #9
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Location: Richmond, VA
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My Ride: White '08 STI
Replacing your suspension will not get rid of that clunk! Ask me how I know...

Check your bushings. That seems to be the consensus.
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Old 02-16-2011, 05:54 PM   #10
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Join Date: Jan 2010
Location: Albany, NY
Posts: 533
My Ride: 2003 BMW 325xi
The whistle/low idle will be fixed by replacing your lower intake boot. The boot rips and changes the air flow into the engine past the MAF.

As for the clunk, I replaced my upper strut mounts and solved the problem.

Sent from my DROIDX using Bimmer App
2003 BMW 325xi
2010 BMW M3 Sedan
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