WARNING! All owners with lowering springs or modified suspension. ACTION REQUIRED if incorrectly installed!

Jaff · Sep 12, 2011

Wow.. Does this apply for the M6 too or is it just M5 specific. I was getting my Eibachs getting installed next week

V10PWR Discussion starter · Sep 12, 2011

Thanks for pointing that out. It applies to both M5 & M6.

Jaff · Sep 12, 2011

Would really appreciate it if someone would give me the part numbers necessary for the bolts need to replace the lowering spring. This looks to confusing

ttribe · Sep 12, 2011

Part number for the hex bolts is 33506779488.

Jaff · Sep 12, 2011

I see.. Thank you, hope the damn dealer has these in stock

V10PWR Discussion starter · Sep 12, 2011

I am working on getting all the part numbers. I will update as soon as I get any info.

Jaff · Sep 12, 2011

I think that would be a great idea for this sticky, so the question doesn't get asked over and over again.

V10PWR Discussion starter · Sep 12, 2011

Exactly! I don't know why I didn't do that in the first place!ouich

Jaff · Sep 13, 2011

These are the part numbers:

-07 11 9 905 374 '6 pieces'
-31 31 6 769 731 '6 pieces'
-33 50 6 779 488 '2 pieces'

These all would cost about 25$

V10PWR Discussion starter · Sep 13, 2011

Yes, I also got the confirmation from My BMW Dealer.

2 Rear Shock Bolts Part Number: 33-50-6-779-488
6 Rear Mount Nuts Part Number: 07-11-9-905-374
6 Front Mount Nuts Part Number: 31-31-6-769-731

Jaff · Sep 13, 2011

I took in the the car to the BMW dealer before I posted out the numbers. Checked every bolt on the actual car, then double checked by the ETK. The price for the bolts was 35$ including tax.

thefirm13 · Sep 14, 2011

Dag nabbit!!

I just replaced mine a couple weeks ago. Oh well, better to catch this now rather than when my shock goes through my wheel well.

Thank you for the sticky.

V10PWR Discussion starter · Sep 14, 2011

Dealer Also confirmed M5, M6, and M6 Convertible are all using the same part number.

M6_kelleners · Sep 23, 2011

I have the worst luck ever, I just installed the KW-V3 one week ago on my car with out knowing about this and it isn't even mentioned in the KW installation booklet. As specified in the installation booklet from KW, we reused all the bolts and nuts that were on the stock setup. Could someone please clarify how many Nm should these bolts be torqued? I didn't understand what they meant by 31 31 1AZ or 33 52 1AZ? what do all these numbers refer to, thanks.

reesy_csl · Sep 23, 2011

Thanks for posting this up. Just ordered my new nuts and bolts! That's going to save us all a load of headaches

Jonath · Sep 23, 2011

Great post!!!

whatheheck · Sep 23, 2011

Thank you V10PWR and everyone for this great post!

Dan

KennethH · Sep 24, 2011

Ok, I think I know what this is all about. It's not unusual that the manufacturer wants you to change certain screws or nuts, after opening them. The reason is most likely that they have applied thread locking fluid to these when assembled in the factory. If you clean the threads and apply the correct thread locking fluid, I see no reason to change any parts. Especially not any nuts. Some bolts/screws in very special cases needs to be tightened to the limit where the material starts to plasticize and that is the only time you need to replace any screws.

kaa · Nov 6, 2012

When I went to order the nuts and bolts from dealership all their names started with, "Self Locking"...for all of them. So I think they are made in a way that the last couple of threads change shape as its tightened the first time and lock the nut in its place. That's why they need to be replaced as it will lose its locking mechanism when its reused.

reesy_csl · Sep 24, 2011

The nuts seem precautionary, the bolt is a stretch bolt from what I gather, so similar to cylinder head bolts, they need replacing.

douglas_ngo · Sep 25, 2011

I have installed several coil over kits on different model BMW and re-use the old nuts without any issues. Granted you can't go wrong with using new nuts either.

Hasan Shaikh · Sep 26, 2011

douglas_ngo said:
I have installed several coil over kits on different model BMW and re-use the old nuts without any issues. Granted you can't go wrong with using new nuts either.

This is only specific to certain BMW models and is not applicable to all models.

KennethH · Sep 26, 2011

Does anyone know if it's possible to losen and apply thread locking fluid to one nut at a time, in the upper front mount, without messing up any angle adjustments? Don't want to redo the wheel adjustments... but i want to make sure the nuts are properly secured.
What's the proper torque to tighten these nuts?

Hasan Shaikh · Sep 27, 2011

I am not sure about the torque specification, but emoving these nuts will not effect the wheel alignment.

landski · Oct 8, 2011

If someone could post the torque specs, that would be really helpful.

reesy_csl · Oct 8, 2011

Front top nuts are 25 lb-ft, rear top nuts are 21 lb-ft.

The bolt on the bottom of rear strut is 122 lb-ft.

KennethH · Nov 6, 2011

Solution/quick solution for the upper front suspension mounts

See this thread if you want to/can fix this on your own: http://www.m5board.com/vbulletin/e6...n/196909-preventing-upper-front-suspension-mounts-coming-loose.html#post2191776

M5Froth · Dec 21, 2011

Is this something I can just have the dealership do? I've have H&R's on my E60 for over 2 years now and my car is still in one piece. I'm not sure if this is an issue for me, but I'm clueless and this thread raises a little concern.

V10PWR Discussion starter · Dec 21, 2011

The dealership is able to do it. It's a very inexpensive fix.
The problem is you will never know when and where it's going to happen. I recommend reading all the posts on this thread to get a better understanding of why those bolts and nuts have to be replaced.

Good Luck.

Vacanator · Feb 18, 2012

What is the validity of this thread? I have had KW 3's on my vechicle and have not ran into any problems for about a year now. I'm pretty sure the shop who did the install did not go to BMW and order new bolts.

MrSypher · Feb 27, 2012

Me too, I have H&R's and they have been fine for over a year but I guess it falls into that "better safe than sorry" category..

atillathetom · Apr 25, 2012

Can they just be LocTite'd?

KennethH · Apr 26, 2012

Sure they can. I posted a DIY-thread. Look into that one.

WARNING! All owners with lowering springs or modified suspension. ACTION REQUIRED if incorrectly installed!

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