BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

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      09-11-2008, 08:33 PM   #1
UpstateNYBMW
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Replicating 128 sport suspension

Does anyone know, for certain, if the 135 springs are the same as the 128 sport springs. If I put a set of 135 springs on my 128i (not sport) would that be the equivalent of the sport suspension? Or would I also need to replace shocks or other parts?

I would love a bit stiffer suspension and having the car lowered a half inch or so. Installing 135 springs sounds perfect, if I don't have to buy a bunch of other parts.

Thanks to you experts for making this a great site. It just makes owning a great car that much better to have a resource like this!:thumbup:
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      10-24-2008, 05:55 PM   #2
NoZSP
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Quote:
Does anyone know, for certain, if the 135 springs are the same as the 128 sport springs.
I'm pretty sure they are the same.

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If I put a set of 135 springs on my 128i (not sport) would that be the equivalent of the sport suspension?
No, there are more parts that are different.

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Or would I also need to replace shocks or other parts?
To have it be the same as the stock ZSP, yes. Whether it would be possible and safe to replace just the springs as you suggest, and how well it would work in terms of ride and handling, is a good question. Can anyone else help us out on this?
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      10-24-2008, 06:28 PM   #3
mikeo
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Springs, strut/shocks, and swaybars at a minimum. Don't know if bushings are different or not.
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      10-24-2008, 08:45 PM   #4
Guibo
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Originally Posted by UpstateNYBMW View Post
Or would I also need to replace shocks or other parts?
According to RealOEM.com, you would need to replace the struts/shocks and swaybars (though swaybar bushings appear to be the same). The standard 128i struts/shocks and swaybars have different part numbers from those on the 135i, but the 128i sport suspension share the same numbers with the 135i. They don't have enough info on the springs, but I'd guess you'd need to replace those too.
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      10-24-2008, 09:03 PM   #5
marius
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why not upgrade to "performance" suspension?
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      10-25-2008, 01:48 PM   #6
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The rear track of the 128i sport and 135i is 20mm wider than the standard 128i.
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      10-26-2008, 09:22 PM   #7
UpstateNYBMW
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Thanks, still might just get springs

Thanks so much for all the information and assistance. That's what makes this site (and Series 1 folks in general) the best.

At this point, it seems like a lot more extensive than I was originally hoping for. I'm probably not going to go all the way to new shocks, bars, etc. But I'm guessing that if guys like H&R have springs that work with the stock shocks, bars, etc, then the stock 135 springs should be similar. A little stiffer, a bit shorter, sounds like a mild upgrade like the H&R OE Sport Spring.

Now I just have to find a local shop that can do a spring install for a reasonable cost. So far, the dealer has quoted me $1,000 installation, while one local shop wanted $700+. Is this something I could have the local Goodyear or Firestone shop do, then have my dealer just do the alignment?
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      10-28-2008, 01:01 PM   #8
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keep us posted on your progress, upstate. I've got non-sport suspension on mine too and i'd love to upgrade at some point. I've been looking at BMW Performance Suspension kit myself...
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