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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 03-27-2013, 06:22 PM   #21
djbradle
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So SamDoe1, you believe this is purely an intake issue? I must clarify that I have no idle issues at all. I used to last year when my intake camshaft position sensor went and then my exhaust camshaft position sensor followed suit. Crankshfat was done before those. All oem brand. This vibration is really only mechanical in nature.

Last edited by djbradle; 03-27-2013 at 06:26 PM.
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Old 03-27-2013, 06:28 PM   #22
djbradle
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Now I do have a loose as a goose upper U-joint on the Lower joint assembly of the steering column. The double universal is good though. Seems built really well.
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Old 03-27-2013, 06:32 PM   #23
E46er75
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Quote:
Originally Posted by djbradle View Post
Do you mean the Intake air temp sensor o-ring? 13621739510 . . . no part number for the DISA o-ring that I can find.
I have some extra disa o-rings I ordered from the website jfoj recommeded. They don't make a replacement OEM o-ring. Your old disa o-ring is a bastard to get off.

Last edited by E46er75; 03-27-2013 at 06:34 PM.
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Old 03-27-2013, 06:35 PM   #24
E46er75
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Too be honest, I'm doubtful that this will fix your issue.
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Old 03-27-2013, 07:28 PM   #25
DavidDee
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I have the exact same problem as OP. But for me I normally only notice it during the cold weather. When I put the car into neutral the vibration goes right away. I do have a slight rough idle so once I take care of that I can see what else I can do.
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Old 03-27-2013, 09:30 PM   #26
djbradle
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Sadly I tend to agree that it won't fix the issue. If only there was that acme part that I could throw at it to wash the problems away. Vibration type issues have been the bane of this car since I bought it at 91k. Control arms, half shafts, bent rims, brakes, . I have never had another vehicle that did this. Even my B5 S4 never had this issue . . (except for the snow packed into the rims when doing spins)
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Old 03-27-2013, 09:39 PM   #27
djbradle
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So has anyone ever contronted the transmission mounts? When my indy shop did my engine mounts two summers ago they said the tranny mounts were solid. I tend to think that somehow these are the culprit since of course only in drive or reverse while idling does it do this. Once the power is transferred to the driveline the vibration is nullified.
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Old 03-27-2013, 10:05 PM   #28
E46er75
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Originally Posted by djbradle View Post
So has anyone ever contronted the transmission mounts? When my indy shop did my engine mounts two summers ago they said the tranny mounts were solid. I tend to think that somehow these are the culprit since of course only in drive or reverse while idling does it do this. Once the power is transferred to the driveline the vibration is nullified.
There is a couple threads on this issue. I suggest looking through them. Mounts have been the target in many debates, but once again probably not the fix considering the amount of fanatics that all have the same issue.
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Old 03-28-2013, 09:53 AM   #29
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Change O2 sensors, clean the MAF, clean the intake air temp sensor, replace IAT sensor o-ring, clean ICV, replace DISA o-ring.

That should fix your troubles.
^ Has everyone with this problem done the above?

Like I said, this problem is not exclusive to the E46 or even BMW as a whole. I've had the same issue on my old Passat (clean MAF and clean IAT fixed the issue) and my current Expedition (clean ICV and fix leaky vacuum hose) and the problem went away.

Vibration or rough idle in D and R is a result of the engine computer not getting the right information on what's going on, not the result of your engine mounts or trans mounts being bad.
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Old 03-28-2013, 10:34 AM   #30
djbradle
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Wouldn't the vibration continue as forward or backward movement progresses from idle position if it was indeed intake issues and/or O2 sensors? As soon as the power is transferred the vibration stops. I'm not doubting you. I just don't fix things without understanding what's in error. As a PM it's a good idea but I've dumped some cash already this year into the oil pan, ccv, and front struts/mounts.
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Old 03-28-2013, 10:41 AM   #31
djbradle
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Then again maybe this is completely normal? I have seen this does affect almost all makes/models of awd vehicles. Certainly if I hold the brake and gas it the vibration does go away slightly so this would preclude the idle rpm's being the culprit, say 600-800.
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Old 03-28-2013, 11:46 AM   #32
E46er75
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Originally Posted by SamDoe1 View Post
^ Has everyone with this problem done the above?

Like I said, this problem is not exclusive to the E46 or even BMW as a whole. I've had the same issue on my old Passat (clean MAF and clean IAT fixed the issue) and my current Expedition (clean ICV and fix leaky vacuum hose) and the problem went away.

Vibration or rough idle in D and R is a result of the engine computer not getting the right information on what's going on, not the result of your engine mounts or trans mounts being bad.
Yup, I replaced, cleaned, triple checked and even had a local BMW shop recheck and still no change..
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Old 03-28-2013, 12:49 PM   #33
SamDoe1
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Originally Posted by djbradle View Post
Wouldn't the vibration continue as forward or backward movement progresses from idle position if it was indeed intake issues and/or O2 sensors? As soon as the power is transferred the vibration stops. I'm not doubting you. I just don't fix things without understanding what's in error. As a PM it's a good idea but I've dumped some cash already this year into the oil pan, ccv, and front struts/mounts.
The engine computer uses the idle control valve and the fuel system to control the amount of air/fuel going into the system based on the readings it gets from the MAF, the O2 sensors, and the intake air temp sensor. This is just like the throttle body off idle. If any of these is wrong, there is less error at low rpm, it can give a rough idle.

Quote:
Originally Posted by djbradle View Post
Then again maybe this is completely normal? I have seen this does affect almost all makes/models of awd vehicles. Certainly if I hold the brake and gas it the vibration does go away slightly so this would preclude the idle rpm's being the culprit, say 600-800.
I wouldn't say it's normal at all. It affects all makes and models of almost every car. Like I said, I've experienced it and I've fixed it. In terms of cost (minus labor), the fixes I've given you would cost less than $20 with the exception of the O2 sensors. On the other hand, you should replace those anyway if you are over 100k.
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Old 03-28-2013, 03:06 PM   #34
djbradle
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Fair enough. I'll try the icv and iat sensor and see where we are.
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Old 03-28-2013, 03:17 PM   #35
BoomerwithBimmer
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I had this rough idle in R. After $2K of troubleshooting by dealer, a battery die out. Replaced battery a miracle no more rough idle.
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Old 03-28-2013, 04:56 PM   #36
E46er75
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I had this rough idle in R. After $2K of troubleshooting by dealer, a battery die out. Replaced battery a miracle no more rough idle.
You replaced the battery and it fixed your rough idle

I guess low voltage could create some issuses but highly doubt this is the solution to the OP and others including myself.

BTW, the temp hit 55 today and guess who's car starting to idle better...
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Old 03-28-2013, 10:33 PM   #37
dmarshE46
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Mounts

I had bad vibrations when idling in D or R, with foot on the brake (namely in D at stop lights).....
Horribly annoying.
My shop replaced two motor mounts, and the transfer case bushing.
Made it all go away. Perfect fix (for this problem).....
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Old 03-30-2013, 05:29 PM   #38
djbradle
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and the transfer case bushing.
^This is what I'm thinking at this point. Once in D or R the transfer case already is taking the power from the tranny. Holding the brake while a T-case bushing is bad could be the very cause when idling.
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Old 03-30-2013, 05:30 PM   #39
djbradle
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E46er75- Have you every replaced this?
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Old 04-05-2013, 08:01 AM   #40
djbradle
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How about the Center Support Bearing? Has any Xi'er had this as the culprit?
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