Z4 E85 2006 3.0SI with M Sports Suspension - Koni vs Bilstein

H

HJBondar

Member
Hi all - I just picked this car up yesterday knowing it needs new struts and shocks. My wife will be the 50% driver so I am looking for a suspension refresh that offer the most compliant possible rise given the nature of it having the M Sport set-up.

Aside from OEM's which are not candidates, the only two options I have found are Bilstein B6's and Koni Sports(yellow). The input I have received is that the Koni Sports, being adjustable, can be dialed in to be a bit softer than the non-adjustable Bilstein's.

Does anyone have experience and/or feedback on this?

Much appreciated - Z4 newbie:)
 
Hello if it’s a 2006 car then it can only an E85 or E86?

Which model as ride height (AFAIK) varies by model?

Would help folks if you describe your current or intended wheel/tyre combo as well?
 
Welcome aboard.
Are you two related??

The quickest and easiest way to get some idea of what we're talking about is through a few pictures of your new Z.
 
I can’t comment on the bilstein shocks but I have koni shocks all round with eibach springs and have found them to be excellent. On a recent run out with some other forum members I went down a country road I’d normally avoid as it’s very bumpy. The car rode so much better than any of my previous zeds,I was very impressed.
 
Dave1971 said:
I can’t comment on the bilstein shocks but I have koni shocks all round with eibach springs and have found them to be excellent. On a recent run out with some other forum members I went down a country road I’d normally avoid as it’s very bumpy. The car rode so much better than any of my previous zeds,I was very impressed.
Click to expand...

Dave - can you tell me which Eibach springs you have and whether your Z came with the Msport suspension or not? Thx - Harvey
 
HJBondar said:
I am looking for a suspension refresh that offer the most compliant possible rise given the nature of it having the M Sport set-up.
Click to expand...
Sachs non-m sport springs and B4 shocks is an option.

Or get coilovers, set high and soft.
 
HJBondar said:
Dave1971 said:
I can’t comment on the bilstein shocks but I have koni shocks all round with eibach springs and have found them to be excellent. On a recent run out with some other forum members I went down a country road I’d normally avoid as it’s very bumpy. The car rode so much better than any of my previous zeds,I was very impressed.
Click to expand...

Dave - can you tell me which Eibach springs you have and whether your Z came with the Msport suspension or not? Thx - Harvey
Click to expand...


These are the springs that are fitted.
https://www.ebay.co.uk/itm/EIBACH-PRO-KIT-LOWERING-SUSPENSION-SPRINGS-30-30-MM-4-PCS-BMW-Z4-E85-/383606462478?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=710-127635-2958-0

This kit was fitted when I purchased the car although it will have had m sport suspension when new. I’ve had another 3.0si with m sport suspension and the new one has a much better ride, much less crashie and skittish on bumpy roads.
 
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