Suspension knocking noise

[tinovittee]

Hi guys... I've noticed a slight knocking noise at low speed over bumps that seems to be coming from the front left suspension. The wheel alignment is fine and I've driven at highway speed (and beyond) and the car still rides smooth and straight. I did some reading and someone with a similar sounding issue found that it was some suspension bushings or something to do with the anti-roll bar mounts. Anyone exerience anything similar?

The car is still under 'plan, would it be covered by that?

 

[Peejay]

Yep. Seems like a worn lower control arm bush.

 

[SP33DYV]

It's probably lower control arm bushes. :dunno:

 

[tinovittee]

And cost/effort to replace those?? Do you reckon motorplan would sort it out?

 

[moranor@axis]

its under motor plan book the car in and have them fix it...

 

[SP33DYV]

And cost/effort to replace those?? Do you reckon motorplan would sort it out?

M/P will cover it. Just insist they have it fixed.

 

[cOlDFuSiOn]

MP will cover it.. just complain and if possible take the workshop manager out with the car so that they can also hear it! :thumbs:

 

[tinovittee]

Cool... thanks guys! was starting to worry a bit, but yeah I'm sure they'll sort it out under MP. :ty:

 

[OppositeLockMT]

We have a knocking noise on our E60 as well, unfortunately we don't have motor plan so it's a bit of a trial and error situation. Let us know what ends up being replaced in the end:thumbs:

 

[tinovittee]

We have a knocking noise on our E60 as well, unfortunately we don't have motor plan so it's a bit of a trial and error situation. Let us know what ends up being replaced in the end:thumbs:

Will do! :thumbs:

 

[tinovittee]

Just want to say :ty: !! It was the front control arm bushes. Booked into Auto Alpina, they sorted it out under MP. They usually issue an invoice to show you how much it would have cost but I didn't get 1 this time. The car's handling so much better now... much more feel on the steering wheel, and the knocking noise is gone. :thumbs:

 

[SP33DYV]

Just want to say :ty: !! It was the front control arm bushes. Booked into Auto Alpina, they sorted it out under MP. They usually issue an invoice to show you how much it would have cost but I didn't get 1 this time. The car's handling so much better now... much more feel on the steering wheel, and the knocking noise is gone. :thumbs:

Good news! :thumbs:

 

[Maximus03]

Hey guys,

I just had my steering rack changed on thursday due to some power steering issues but now i noticed that when driving on the N1 today and going over joins in the roads(slight bumps at around 130km/h) the car feels like a big truck passed closely and the back seems to sort off "twist". The main feeling however is like a big truck passing you on a windy day.
Any ideas?

Thanks in advance :=):

 

[Philip Foglar]

Just want to say :ty: !! It was the front control arm bushes. Booked into Auto Alpina, they sorted it out under MP. They usually issue an invoice to show you how much it would have cost but I didn't get 1 this time. The car's handling so much better now... much more feel on the steering wheel, and the knocking noise is gone. :thumbs:

Glad you got this sorted out! As far as I know, the Z4 chassis is very much based on the E46, so this is a relatively common thing to happen, and at this stage there are plenty of out of motorplan third party options available for future that are not too terribly expensive.

:thumbs:

 

[tinovittee]

Just want to say :ty: !! It was the front control arm bushes. Booked into Auto Alpina, they sorted it out under MP. They usually issue an invoice to show you how much it would have cost but I didn't get 1 this time. The car's handling so much better now... much more feel on the steering wheel, and the knocking noise is gone. :thumbs:

Glad you got this sorted out! As far as I know, the Z4 chassis is very much based on the E46, so this is a relatively common thing to happen, and at this stage there are plenty of out of motorplan third party options available for future that are not too terribly expensive.
:thumbs:

Good to know! Thanks!

---

Hey guys,

I just had my steering rack changed on thursday due to some power steering issues but now i noticed that when driving on the N1 today and going over joins in the roads(slight bumps at around 130km/h) the car feels like a big truck passed closely and the back seems to sort off "twist". The main feeling however is like a big truck passing you on a windy day.
Any ideas?

Thanks in advance :=):

I had the same thing after I changed the rear tyres on my 1er... know exactly what you're talking about! I actually sold the car before sorting that out though, but my guess is that it's something small... maybe just wheel alignment or something?

 

[Turbo6]

Or it could be the rack that has too much end play. Did you fit a new steering rack of refurbed one?

 

[Reddy]

Hey guys,

I just had my steering rack changed on thursday due to some power steering issues but now i noticed that when driving on the N1 today and going over joins in the roads(slight bumps at around 130km/h) the car feels like a big truck passed closely and the back seems to sort off "twist". The main feeling however is like a big truck passing you on a windy day.
Any ideas?

Thanks in advance :=):

Hi there,
I have the same problem. But mine started after I changed my rear tyres (19inch 265). Did you find the fault?

 

[MikeR]

:thumbs: MP will do it

 

[Reddy]

Hi MikeR,

Not sure if you are referring to motorplan? Mine is out of motorplan.

 

[tinovittee]

Have you checked your wheel alignment? Maybe do that before checking other big expensive causes...