REWARD if successful: help me identify where this annoying interior rattle is coming from 2021 M3P

[M3PBOSS]

Hi guys, i would be grateful if you could help me identify where this annoying rattle is coming from. Its a plastic sounding tapping sound coming from the rear boot area in my 2021 M3P. It comes on uneven roads and is worse when going downhill. I will give a reward to the person who correctly localises where the rattle is coming from!

Thanks in advance

 

[Medved_77]

The link to the video isn't working for me I'm afraid.

 

[M3PBOSS]

The link to the video isn't working for me I'm afraid.

Its up now!

 

[PACEMD]

Sounds like some kind of piece of thing rubbing up against another thing, in my opinion. Radio helps.

 

[SSonnentag]

Rear seat shoulder strap tension gizmos.

 

[PACEMD]

No seriously, if you can ride in the back and localize the noise that would be a good start. All of my P3D rattles have been from the seatbelt height adjusters and as often as not go away on their own. There is a rattle post here.

 

[PACEMD]

Often just sliding the seatbelt adjust up or down a bit does the trick, for that issue.

 

[spooksman]

Often just sliding the seatbelt adjust up or down a bit does the trick, for that issue.

My parcel shelf made rattling noises - I tried everything without success, however the SC sorted if after driving down a cobbled street to find the issue.

 

[MrBadger]

Hi guys, i would be grateful if you could help me identify where this annoying rattle is coming from. Its a plastic sounding tapping sound coming from the rear boot area in my 2021 M3P. It comes on uneven roads and is worse when going downhill.

Buckle up all the seat belts to see if things change, including front passenger. If no difference, drop the rear seats flat and try again.

 

[AndrewGR]

Mine had a difficult to localise rattle from the back. I took a guy from the SC for a drive on cobbles. He traced it to a missing parcel shelf clip. Might be the source of this noise.

 

[PACEMD]

Still don't know what a parcel shelf is but found this.........Parcel Shelf Rattle

 

[browellm]

Still don't know what a parcel shelf is

Yes, definitely merge the boards @VanillaAir_UK

 

[Realaustin]

My money is on the passenger side rear side cushion ( the piece that’s left once you fold the seat down ) mine is not fitted properly and makes some noise, I also have a really bad rattle/knock coming from the front passenger seat when it’s empty but that’s louder than your noise.

 

[gdallas]

Buy a can of silicon spray and go to town! My m3p 21 rattles loads of places too. My window seals were bad rattling off the window. Silicon spray on the seals solved it.

 

[davidmc]

Is it something under the back cushion seat that's resting on the metal below.

Easy to lift up and have a quick look

 

[kelvin 660]

The SC (Bristol) found a piece of plastic that had gone down the rear air vent during assemble that rattled like that...
They only took an hour or so to find and fix the problem...

I thought the noise was coming from the back of the car. Very misleading...

 

[Bantam]

I have a similar annoying rattle (Mine is Sept 2020 M3 LR) and while there was a break in the weather that aligned with me having some free time (no Garage for me to work in) I did some investigation work and came to the conclusion that it could be a lose Rear boot latch (see link to short video I made). unfortunately the weather turned bad before I could start pulling off the cover on the boot lid to inspect. Before I devote anymore free time on the issue, can anybody confirm if this loose latch is normal and it loose by design?

Login - Dropbox

 

[NigelT]

You can locate rattles and such using an app on your phone, connecting to the car's entertainment system, turn the volume up and go through the frequency until it starts to resonate. I can't claim I came up with this I saw it on a Youtube video but I've been doing it for years and it works every time.

The app I use is called 'tone generator' on an iPhone. I'm sure there are plenty of others for all phones.

p.s. what's the reward?

 

[mick4545]

I found my rattle by getting wifey to sit in the rear seat and press down on the parcel shelf wile I was driving over a bumpy service. Result! It was the parcel shelf what done it. Bristol SC sorted it.

 

[GRiLLA]

Has the body in the boot regained consciousness? needs another smack with a shovel.