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      05-16-2015, 03:25 PM   #1
NTTY
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Hydrobearing replacement with M3 one

Hi Everyone,

Has anyone tried to replace the front hydrobearing (in traction strut) using the M3 one?

I know the rear axle of the X1 can be upgraded using M3 parts (including subframe bushings), but the front axle is quite different and we can't swap parts. That said, it seems to me the M3 hydrobearing could fit the traction struts of the X1. So i'm curious if someone here has tried.

Hydrobearing of the X1 (green):


And the same part on a E82, on which the M3 hydrobearing fits:


Thank you.
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      05-18-2015, 07:28 AM   #2
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The 335xi and 335i part numbers are different. This at least leads me to believe that the M3 bearing won't be a direct fit.

But to help your search, search for posts on the E90 forum regarding 335xi bushing/control arm replacement options. As a general rule, our chassis is pretty much all 335xi.
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      05-18-2015, 11:08 PM   #3
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Thank you for your reply, but I searched before posting here and I failed finding someone who has tried this.
Anyway, I ordered the two parts, the X1 and M3 hydrobearings, so I'll be able to compare them. Crossing fingers now.
Cheers.
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      05-19-2015, 08:57 AM   #4
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Keep us posted I guess!
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      05-19-2015, 01:52 PM   #5
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Sure, I will
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      05-19-2015, 02:04 PM   #6
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I don't see why you'd bother, unless your original bushings are worn. Even then. OTOH, since most manufacturers use a process to increase commonality of small components, maybe it'll fit. GL
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      05-19-2015, 02:17 PM   #7
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Quote:
Originally Posted by zeevette View Post
I don't see why you'd bother, unless your original bushings are worn. Even then. OTOH, since most manufacturers use a process to increase commonality of small components, maybe it'll fit. GL
Don't agree there.

While I don't think it will fit (again the 335i part isn't the same as the 335xi part), that bushing (along with the rear subframe bushings) is one of the biggest contributors to the soft/rubber-bandy nature of non-M E80/90 chassis. Big changes to the handling at the limit replacing that one and a couple in the rear on other cars.
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      05-19-2015, 02:24 PM   #8
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Lots of guys run these, instead of doing full M3 arm swaps on their E82s and E90s...

http://www.hpashop.com/product.sc?pr...categoryId=175

Nice improvement.
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      05-19-2015, 02:25 PM   #9
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OP: Not sure you can trust it...

http://www.e90post.com/forums/showthread.php?t=588035

But post #20 claims they won't fit. But maybe that's because they didn't try and just went by part number.
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      05-19-2015, 03:13 PM   #10
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That's my guess. Other possibility is that those of the M3 would need some work to fit. I'll be sure when I have them.

PS: I changed all bushings of my 135i for those of the M3 or Motorsport when M3 ones did not fit. Amazing improvements...
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      05-19-2015, 03:17 PM   #11
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Quote:
Originally Posted by zeevette View Post
I don't see why you'd bother, unless your original bushings are worn. Even then. OTOH, since most manufacturers use a process to increase commonality of small components, maybe it'll fit. GL
The original bushings are way too soft. M3 ones should be a minimum since they don't generate more noise and make the car much sharper and enjoyable.
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      05-19-2015, 04:53 PM   #12
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OK, makes sense. I don't drive mine aggressively, so I don't have the same priorities. I like strong acceleration, but I won't make mine into a road racer.
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      06-20-2015, 12:01 PM   #13
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Hi everyone,

Update here, they fit

Stock hydrobearing:



And M3 bushing:



The M3 one is 4mm longer, so my mechanic had to shorten it by 2mm on each side. Diameter is the same when pressed for insertion.

Note that stock hydorbearing hole is eccentric (not sure it translate) while M3 one is not. It is the same story on non-xDrive car, though. Here below the hydrobearing of an E8x/E9x non-xDrive:



This means that the caster is changed a bit, but it has no significative impact behind the wheel (it had more impact on my 135i). In addition, note the tension strut is bigger on the X1 than on a M3, so you have to center the M3 bushing inside:



See the difference with the M3 arm (and the additional bushing I've put on the X1):


It is a pain to fit it in. My mechanic had to build a specific tool, but I guess BMW should have that kind of tool. Anyway, they went on my car, with other mods I'll talk about soon, and the difference is the same I felt on m 135i when going M3 arms, better precision of the front axle, especially when braking hard. And talking about brakes, by the way, M3 front pads fit on my X1 20i (same brakes on the 28i I believe), so I went with the new Pagid RSL pads, and that makes an amazing combination...
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      06-20-2015, 03:35 PM   #14
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Do you have the link and part number for the m3 brake upgrade? I've been looking to upgrade my brakes somehow.
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      06-20-2015, 04:50 PM   #15
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Hi,

Sure, but no real link to provide you with. The references for Pagid are:
- 8053 (those of the M3 E9x) for front axle
- 8035 for rear axle (will fit a lot of BMW)

Pagid makes those pads in different friction for road and track. I wanted the RS29 that I have on my 135i but they seem to be out of stock everywhere, so I went with the newer RSL1, still from the yelllow (endurance) line. They do a heel of noise though, so I hope they'll be quiet soon.

Note that we had to perform minor adjustments to make them fit. Nothing major, and nothing a good mechanic can do easily.

So basically, if you can't find a specific pad for the front axle of the X1, you can safely go with those of the M3 from whatever brand you want.
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      08-24-2015, 10:40 PM   #16
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I am going to be trying this next week. I think my stock bushings are shot. Are you still happy with this? There are some other bushings available that are poly by strongflex, trying to decide between those and the M3 ones.
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      08-25-2015, 09:54 PM   #17
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I decided to go with these bushings over the M3 ones - they are a bit more expensive but should deflect less and have an option specifically made for the xdrive cars. I am hoping they fit with no modification as the part number on the X1 is shared with the 335i xdrive.

I also ordered the M3 Strut Tower Brace kit from HPA Autosport.
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      08-26-2015, 05:47 AM   #18
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Quote:
Originally Posted by paradoxical3 View Post
I decided to go with these bushings over the M3 ones - they are a bit more expensive but should deflect less and have an option specifically made for the xdrive cars. I am hoping they fit with no modification as the part number on the X1 is shared with the 335i xdrive.

I also ordered the M3 Strut Tower Brace kit from HPA Autosport.
Link to the bushings?
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      08-26-2015, 08:33 PM   #19
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Quote:
Originally Posted by PrematureApex View Post
Link to the bushings?
Ah sorry about that

http://www.rogueengineering.com/rogu...E-TAB-E9X.html
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      08-26-2015, 09:54 PM   #20
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BTW if you track your X1 I highly recommend upgrading your OEM ones...LOL
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      08-27-2015, 06:46 AM   #21
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Really pisses me off in general. Is the average customer in any way offended by the bit of increase in road feel decent FCA bushings add to the car?

There was absolutely no reason that the regular E90s needed different front bushings vs. the M3. They really junked up the handling of the car when hustling...so much windup/rebound/deflection it's ridiculous.

The E36 and E46 never had these issues. No damn reason for it.
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