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Fitting M3 Control Arms

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tiglon
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Fitting M3 Control Arms

Post by tiglon » Mon Sep 13, 2021 4:36 pm

I bought some E90 M3 control arms to fit to my Z4, thinking I'd just call up my local BMW indy and get them to install them. I've tried 3 local BMW specialists and none seem keen. Two offered to have a look but weren't confident on the headlight levelling sensor issue. The third refused to fit supplied parts due to insurance, but quoted for supplying themselves and fitting - more expensive and I'd need to sell or return the parts I already have. He did seem very relaxed about the sensor issue, but I think that might have been because he stopped listening when I said I'd already got the parts.

Has anyone had this done previously and can recommend somewhere? Happy to travel a bit.
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Argyll Andy
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Fitting M3 Control Arms

Post by Argyll Andy » Mon Sep 13, 2021 4:42 pm

I’m sure John-E89 has them on his 35i. Don’t know if there’s differences between that an the iS.
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    Fitting M3 Control Arms

    Post by tiglon » Mon Sep 13, 2021 5:35 pm

    Thanks Andy, as far as I'm aware the 35i and 35is are exactly the same in this respect.
    2014 E89 35is orange (current)
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    Ed.Straker
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    Fitting M3 Control Arms

    Post by Ed.Straker » Mon Sep 13, 2021 7:41 pm

    I'm looking at this too.

    The eponymous pbondar on this forum did this himself..if you search you should find a write up.

    The issues are that the headlamp leveling is on the opposite side to that on the M3..so the bobble that the self leveling arm connects to has to be cut off from its location on the old arm and fixed somehow to the new arm.

    A chap in the States did it with tie wraps and looked pretty horrible.

    I believe pbondar used aerospace glue to fix his.

    Because the linkages are not identical a full 4 wheel alignment will be required post fitment.

    That is if you do the rear bearing mods too.

    I would imagine that any cutting and shutting will have the average dealer running for the hills.
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    Fitting M3 Control Arms

    Post by tiglon » Mon Sep 13, 2021 9:55 pm

    Thanks, I've read a couple of write ups but I just don't have the space/tools to do it myself. One indy suggested they might drill a new hole in the other control arm, but it really doesn't sound as complicated as that. I'll keep searching for somewhere that seems a bit more confident, otherwise get one of the local guys to have a look.
    2014 E89 35is orange (current)
    2005 E85 20i manual silver
    2011 E89 30i manual grey

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    Fitting M3 Control Arms

    Post by Ed.Straker » Tue Sep 14, 2021 11:15 am

    Drilling a hole in a steering linkage I think is an exceptionally bad idea..if it was OK why didn't BMW do it?
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    Fitting M3 Control Arms

    Post by tiglon » Tue Sep 14, 2021 2:18 pm

    Ed.Straker wrote: Tue Sep 14, 2021 11:15 am Drilling a hole in a steering linkage I think is an exceptionally bad idea..if it was OK why didn't BMW do it?
    That was my thought, hence definitely not using that particular garage.
    2014 E89 35is orange (current)
    2005 E85 20i manual silver
    2011 E89 30i manual grey

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