Note: This thread is NOT pointing at any specific brand, vendor, or installer. This is about INSTALLATION. The purpose of this thread is to inform owners of SPECIFIC INSTALLATION INSTRUCTIONS GIVEN BY BMW, and often missed by installers.
Failure to follow BMW instructions could lead into a potential disastrous failure shown in the following thread: Could have been a disaster today... check this out!
Luckily no one has been hurt.
In this member avi8tir case, Bolt #2 shown in the image failed.
You can see those specific parts highlighted in BMW OEM installation guide.
The Part Numbers are:
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
Special thanks to everyone contributing knowledge and information in this matter.
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
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.
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.
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.
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.
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.
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.
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?
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.
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.
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.
Sure they can. I posted a DIY-thread. Look into that one.
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