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Go Back   E46Fanatics > Tuning & Tech > Suspension & Braking

Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 05-10-2009, 05:58 AM   #1
oliverreed
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Join Date: Apr 2009
Location: ireland
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My Ride: 318i
Angry loose ,bump steer,wandering,constant correction, steering

after 3 racks,inner,outer ties,2 front tyres,3 alignments,balancing,cabs,i finally called it a day withh my 00 .A question ,ARE THESE CARS GOOD OR BAD TO DRIVE OVERALL,ive kept my 03 step car,but still same issues,i mostly use my astra for driving anywhere ,just keep bm to look at and wash and wax it,
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Old 05-10-2009, 06:03 AM   #2
EDawg
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maybe the balljoints on your control arms are bad. that seems like the only thing you haven't changed. other than that, depending on mileage, your struts and strut bearings can be bad. or maybe you're just not accustomed to the fact that the e46 provides a lot of front end feedback, and you are mistaking that with sloppy steering.

Last edited by EDawg; 05-10-2009 at 06:06 AM.
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Old 05-10-2009, 07:15 AM   #3
grafiksguy
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Oliver, I can sympathize with your frustrations. I've had a twitch (for lack of a better word) that I've documented here and have been chasing for the better part of two years. Symptoms are a slight yank of the steering wheel when you hit a bump on one side or the other and the steering wheel will twitch/jerk to that side. It's not really a bump-steer because the car doesn't change direction, but I doubt this what BMW intended as "feedback". To recap I've changed: Struts, strut bearings, sway bar bushings, steering links, control arms and CA bushings, flexible steering coupling, 1 tierod, 1 tierod end, and probably something I've forgotten here, and had the car aligned (2X) and had two qualified indy's certify that everything seems in order. Car tracks straight, no noises, just this damn twitch,which by the way, it does with two completely different sets of tires/wheels so I know it's not that, oh, and seems to be a bit worse on the right side. In my case I've decided it's an idiosyncrasy of my particular car and I've come to an grudging acceptance of it. Whenever I read a thread like this however, the Mr. FixIt in me gets wondering again.
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Old 05-10-2009, 02:57 PM   #4
oliverreed
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thanks for your input,but having the same probs with 2 cars (2000 and 2003) at the same time,makes you think about bmw
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Old 05-30-2009, 01:55 PM   #5
jai_c
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Anyone have a answer for this yet? It's driving me insane. I'm about to put my H&R cupkit in but I hear lowering the car may make it worse. I think mine is pretty bad already, I'm constantly wandering into other lanes. It's crazy because my steering wheel is straight but my wheels are all over the place.
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Old 05-30-2009, 02:28 PM   #6
TxZHP04
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Have you guys replaced your RTABs?
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04 IR 330i ZHP | ESS TS2+ SC | MagnaFlow "headers" | KMS 3.64 LSD | AST 4100 550/650| APEX ARC-8 18x9 | H&R front sway bar | Vorshlag camber plates, RTAB limiters | TMS subframe & swaybar reinforcements | UUC SSK & DSSR | UUC TM & TME | BW motor mounts | Dinan strut & shock tower bars | vaio 4-bolt oil pump
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Old 05-30-2009, 02:56 PM   #7
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I haven't.
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Old 06-28-2009, 02:45 PM   #8
jai_c
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Just changed my my rtabs and installed my cupkit. definite improvement!!!
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Old 06-29-2009, 03:58 PM   #9
Richy_Boy
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I have this on mine and am about to put M3 RTABs on there to see if it helps. My other thought is shock absorbers once the usual culprits are ruled out. So far I have done the front wishbones & bushes and had it aligned - might go for tie rods next (both inner and outer sections).

I also contacted BMW about my flexi steering coupling, yet it seems as my car is RHD I have a very different part, twice as big, twice as strong and twice the price! The BMW parts guy said he's only ever sold two of them - both from accident damage.

..the hunt goes on!

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Old 01-03-2010, 09:37 PM   #10
Ecoloqua
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Not to revive a thread that may be long dead but I have the same type of "wandering" on bumpy roads since I bougt my M3. It is an 04' and I bought it with only 24K miles on the clock. I took it in to the dealer for an alignment and they said that my rear bj's were worn and they wanted over 1k to replace them. My head exploded in rage because I could not understand how a car with only 24k miles would already need sus. componenets replaced. Long story/short....I took it to one of the most respected susp. shops in town to have it looked at and they said it was fine. I suspect that it is just the way BMW M3s are made. Espcially after reading the great lengths that some of you go chasing down this perceived problem. I have owned just about every sports car imaginable...including 3 Ferraris, a couple of Vipers, Acura NSX, Porsche 930, several 911's.. etc. All were stock suspension and some had more mileage than my M3. None of them exhibited this sort of "bump steer" effect. I think it is just the design.

Last edited by Ecoloqua; 01-03-2010 at 09:40 PM.
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Old 01-04-2010, 01:46 AM   #11
323i matt
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ive got a 323i se and it does the same thing

ive narrowed it down to the top mounts on the shocks being worn and the bearings so movement in the suspension making the car not as it should

maybe worth checking on yours ?
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Old 01-04-2010, 10:25 AM   #12
CBell330
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my 01 330ci has bump steer...its alot better if your going faster....idk why. ill see if my rear control arm bearings are the culprit. Mine is in the shop for basicaly new right rear ca's wishbone etc. ill tell ya on the 9th(HOPEFULLY)
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Old 01-27-2013, 08:11 AM   #13
yannis4ny
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i am having the same problem. car wandering around after it hits a bump. i know this is quite old thread, but i was wondering if anyone has figure this out? I was quoted 1100 for changing all shocks and struts but i don't feel that this is the problem. Also my right strut tower is deformed just a bit(mushroom). I have a feeling that it might be the strut mounts and this "mushrooming". thanks
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Old 01-27-2013, 08:32 AM   #14
DHK
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Bad RTABs, and FCABs can lead to wandering steering.

Also on rutty shitty roads, certain tires will tramline like crazy. My summer tires tramline a lot but my winters dont.
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Old 01-27-2013, 08:56 AM   #15
yannis4ny
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Thanks for the reply, FCABs replaced, RTABs told are good! Asked to change the struts and shocks $1100. maybe they would do the RTABs for free!

Last edited by yannis4ny; 01-27-2013 at 09:29 AM.
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Old 01-27-2013, 10:10 AM   #16
BMWCaptain
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Should replace your steering guibo. Common problem and cannot tell with just looking at the steering joint. Cost about $50-60, but well worth replacing.
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Old 01-27-2013, 12:07 PM   #17
yannis4ny
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guibo that was done 15k ago with oem. There is no clicking in my steering wheel.

The car has a sport package and doesn't bounce around when i press down on the front or rear. This is how i eliminate the shock strut problem. there is a little mushrooming on the right shock tower though?
what i have done:
FCABs
stabilizing links/sway bar endlinks
control arms are OEM good

I want to run a poll:
A)who thinks it's the RTABs?
B)the mushrooming effect?
C)the struts?
D) all of the above?

thanks

Last edited by yannis4ny; 01-27-2013 at 12:22 PM.
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Old 01-28-2013, 09:57 AM   #18
BMWCaptain
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check your ball joints

Quote:
Originally Posted by yannis4ny View Post
guibo that was done 15k ago with oem. There is no clicking in my steering wheel.

The car has a sport package and doesn't bounce around when i press down on the front or rear. This is how i eliminate the shock strut problem. there is a little mushrooming on the right shock tower though?
what i have done:
FCABs
stabilizing links/sway bar endlinks
control arms are OEM good

I want to run a poll:
A)who thinks it's the RTABs?
B)the mushrooming effect?
C)the struts?
D) all of the above?

thanks
Get under your car and check your ball joints. Also check your your strut mounts from above by removing the dust cap.
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Old 01-28-2013, 02:22 PM   #19
Mobil
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I have a 330ci that is doing the same thing. It has become progressively worse over the last year so I started replacing things and have NOT found the major contributor yet.

So far I have replaced:
Front control arms and bushings
Front wheel bearings
Steering flex coupler (guibo)
Rear trailing arm bushings

All of the above items were showing signs of major wear or damage, improvements inhandling were noticable but none of them were the culprit of the wandering...

I am now more convinced that the shocks/struts and mounts etc are the likely offender. I will investigate their condition this weekend maybe.

So I vote Struts, strut mounts...


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Last edited by Mobil; 01-28-2013 at 06:03 PM.
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Old 01-28-2013, 02:28 PM   #20
WDE46
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My car still tramlines quite a bit. I believe that is what you guys are experiencing. It wanders a little too. I think my struts may be bad. I'm only at 75k miles but I believe the PO's location had crap roads. My steering is vastly improved after RTABs, FCABs, control arms, and a steering guibo. It's not perfect yet. I'm going for some coilovers or H&R for new suspension components. If that doesn't work, I'm getting a new steering rack.
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