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Suspension & Braking Forum by BimmerWorld
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Old 03-07-2012, 04:31 PM   #1
ecco123
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Join Date: Mar 2012
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My Ride: BMW E46 330xd
Help with 330xd suspension

Hi everyone. (I don't know if this post is best placed here or in the xi forum)

I'm new in the forum and already asking questions.

My 330xd has covered 205.000 km (about 130.000 miles) and the shocks have never been replaced so it's maybe time to do it. I haven't done it before cause the suspension felt perfectly firm (I believe the stock X versions have firmer stock shocks) and it still is firm, but it makes some tiny bouncing when driving harsh surfaces and it doesn't hold as well as before when driving fast in bends (for quiet driving is still fine).

Anyway, I've decided to replace the shocks and I want to mantain the stock comfort, so I decided to go with the stock shocks, but the problem is that they are way dearer than Bilsteins :

OEM: ( 750 - about $ 990) / Bilstein B6 Sport Heavy Duty ( 520 - about $ 690).

So extra $ 300 is quite a lot specially considering that OEM has 12.000 km warranty and Bilsteins lifetime warranty!

The problem with the x-drive E46's is that you can only choose between OEM, Bilstein Sport os even Koni Sport adjustable that are cheaper than Bilsteins (what I discard cause I've been told are harsher than Bilsteins even adjusted in the softest position).

So, would you say the comfort loss would be noticiable if I fit the Bilsteins? Last years I've been driving mostly in long highway trips at moderate speed so I think a Mercedes S-Class would suit me more, but I love my 330xd!

I've read opinions of people saying that bilsteins are progressive and they are even softer than the OEM's until you push them hard, but I talked with the guy that sells the Bilsteins and he never heard about that. Moreover, nothing about progressive technology appears on Bilstein website.



There's something else I'd like to ask you: I've read that is good to take the chance and install new shock mounts and bump stops.

I agree about the bump stops, but is it really neccessary to replace the mounts? I never heard that shock mounts can wear but last years my car is wearing the tires so mach in the interior side, no matter how many times I allign steering so maybe a worn front shock mount could affect the camber and produce this?

Also, is it worth to go with OEM mounts and bump stops? I've seen this in Ebay at a great price (about 1/4 of the price BMW dealer would ask me: http://www.ebay.com/itm/BMW-E46-FRON...#ht_3344wt_901) Would you mount that or go with OEM?

Thanks a lot in advance.

Last edited by ecco123; 03-07-2012 at 04:33 PM.
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Old 03-09-2012, 08:15 PM   #2
Stinger9
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Have you considered KONI FSD's?
better ride than stock, better handling than stock
lifetime guarantee
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Old 03-10-2012, 08:54 AM   #3
ecco123
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Quote:
Originally Posted by Stinger9 View Post
Have you considered KONI FSD's?
better ride than stock, better handling than stock
lifetime guarantee
Thank you.

Yes, I've considered them and they'd be perfect for what I want, but they don't make it for xi / xd versions, just for RWD.
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Old 03-10-2012, 10:03 AM   #4
Stinger9
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Originally Posted by ecco123 View Post
Thank you.

Yes, I've considered them and they'd be perfect for what I want, but they don't make it for xi / xd versions, just for RWD.
Ah, that's too bad!

I had looked them up on KONI site, but thought I had seen them. Wonder why they don't do them?
What is different about the configuration that makes them not fit the xi? Or is it the valve settings?

Last edited by Stinger9; 03-10-2012 at 10:10 AM.
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Old 03-15-2012, 01:36 PM   #5
deadwood83
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Quote:
Originally Posted by Stinger9 View Post
Ah, that's too bad!

I had looked them up on KONI site, but thought I had seen them. Wonder why they don't do them?
What is different about the configuration that makes them not fit the xi? Or is it the valve settings?
Everything except the top of the strut tower is different on the front of an xi.

Kubica ran Bilstein HD fronts and Bilstein Sport E36 M3 rears on his stock springs. Might want to send him a PM. I'm having the same Bilsteins installed on my car as I type this, but also with Eibach springs.

Whatever you do, remember that new components need a month or two to reach optimum comfort. Even if you threw on new Sachs today it would feel a bit harsher than 'stock.' (or better, depending on the wear level of your current components)

The only way to keep the same ride feel though is to go OEM. Anything else will change it a little.

For mounts do Meyle or Rogue rear shock mounts (Rogue is best, but budget is always a concern) and OEM front mounts.
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Last edited by deadwood83; 03-15-2012 at 01:37 PM.
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Old 03-16-2012, 06:33 PM   #6
ecco123
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Thank you guys.

I've been told that Bilstein actually made the stock E46 XI shocks, unlike the RWD versions made by Sachs.

That sounds very weird to me. Have you ever heard BMW using Bilstein as original equipment?

I took pictures of one of my rear shocks label, if that helps to clarify it:




Last edited by ecco123; 03-16-2012 at 06:35 PM.
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