Knocking sounds from rear when slow down......

Re: Knocking sounds from rear when slow down......

bkelz;860783 said:
Do you where the knock is originating from? I am getting greedy and starting to spray all joints etc..
Anyway, it does not feel oily and its for rubber mah.. just gun evry joint
Click to expand...

hehe joking bro, mine is not the joint, mine is the final drive as claimed, not settled, and not intend to let it rest for the moment.
 
Re: Knocking sounds from rear when slow down......

OldMasterQ;860784 said:
hehe joking bro, mine is not the joint, mine is the final drive as claimed, not settled, and not intend to let it rest for the moment.
Click to expand...

This is something you cannot let go, persist on! cars are so expensive and getting this kind of lemon is totally not acceptable
 
Re: Knocking sounds from rear when slow down......

has the same rear knocking sound, this is the 4th time I leave the car with PML for 3 days, got it back today the moment I drive out from PML hear the knocking sound again is from the rear left sound, anyone out there has this resolved on Sdrive 23i?
 
Re: Knocking sounds from rear when slow down......

anvillyson;902585 said:
has the same rear knocking sound, this is the 4th time I leave the car with PML for 3 days, got it back today the moment I drive out from PML hear the knocking sound again is from the rear left sound, anyone out there has this resolved on Sdrive 23i?
Click to expand...

anyone has experience on this?
 
Re: Knocking sounds from rear when slow down......

If its not someone from the BMW factory stuck in the boot trying to get out, PML has to resolve the issue if the vehicle is still under warranty.

It could be a design flaw or something minor like a loose bracket or bushing from the fuel tank assembly causing it to dance about on back and forth moments. Due to the tight spaces, I would assume the slightest slack will get parts knocking each other.

Hope the problem gets solved so you can start enjoying your car fully. All the best.
 
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Re: Knocking sounds from rear when slow down......

Unfortunately this issue remained unresolved, several attempts by PML but they just cant fix it. Fed up.

How many Z owner here has the same problem?
 
Re: Knocking sounds from rear when slow down......

I am sure if it is a inherent problem of the car, there will be a fix-it soon on its way either by BMW or third party specialists. ... It's still a great looking car and drives very well.
 
Re: Knocking sounds from rear when slow down......

The unlucky one that our beloved z produced such irritating rear clunking/ knocking sound:

1) Me
2) Falken
3) Anvillyson

Bleah.....
 
Re: Knocking sounds from rear when slow down......

anyone has experience on this?
Click to expand...

I heard this faint knocking sound coming from the left back of the car this morning..and I said to myself...or no. Not happening to me. Everytime I pulled to a stop at the lights, I hear it. I moved off from stand-still, I hear it too. Off the aircon and radio, it is a cluck cluck sound...becoming more obvious.

I tried to isolate exactly where the problem is. Cant seem to find it whole morning.

Finally I found it!! Was the passenger seat belt buckle knocking the side of the door.

Heng ah..!!
 
Re: Knocking sounds from rear when slow down......

Solidgold;912265 said:
I heard this faint knocking sound coming from the left back of the car this morning..and I said to myself...or no. Not happening to me. Everytime I pulled to a stop at the lights, I hear it. I moved off from stand-still, I hear it too. Off the aircon and radio, it is a cluck cluck sound...becoming more obvious.

I tried to isolate exactly where the problem is. Cant seem to find it whole morning.

Finally I found it!! Was the passenger seat belt buckle knocking the side of the door.

Heng ah..!!
Click to expand...

Dont worry as long as it is not "gung"..or "tump"....sound...:p
 
Re: Knocking sounds from rear when slow down......

I have started to notice a bit of the same sounds you are describing, especially from the left. It does get irritating from time to time. No one can identify where the sounds are from, but I have a suspicion it could be a failed exhaust dampener that developed a hair line crack or lost its elasticity. Whatever the case, I'm going ahead with replacing all the exhaust dampers and see if it resolves the problem. Will keep you folks updated.
 
Re: Knocking sounds from rear when slow down......

Guys,

What size of rim are you guys on, I am on 19" staggered. Went for a test drive today again and they assume it due to the rim size which I don't think so,anyway going to fix another appointment to troubleshoot this.

OldMasterQ;911489 said:
The unlucky one that our beloved z produced such irritating rear clunking/ knocking sound:

1) Me
2) Falken
3) Anvillyson

Bleah.....
Click to expand...
 
Re: Knocking sounds from rear when slow down......

anvillyson;912913 said:
Guys,

What size of rim are you guys on, I am on 19" staggered. Went for a test drive today again and they assume it due to the rim size which I don't think so,anyway going to fix another appointment to troubleshoot this.
Click to expand...

hello, you have this problem since day 1 or only in this recent?
 
Re: Knocking sounds from rear when slow down......

ok, i am still trying to find a solution,if you need need me to pml, let me know.
 
Re: Knocking sounds from rear when slow down......

I also haev this occasionally knocking sound, anyway sending to work shop tomorrow. Will update what Performance say
 
Re: Knocking sounds from rear when slow down......

Wah another victim.

I alread know what PML will say to you.

1) Me
2) Falken
3) Anvillyson
4) Keithong74

We should do a Group Complaint ke ke ke
 
Re: Knocking sounds from rear when slow down......

How about SLK or Porsche, any idea whether they have such similar complaints ?
 
Re: Knocking sounds from rear when slow down......

still could not resolve this with PML, thought of taking it to outside workshop. who can i bring it to from the recommended workshop list?
 
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