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Clunking noise from the rear of the car finally fixed!

I am posting this in case someone in the future may have the same problem. I searched for the source of this rattle/clunk for months with no luck.

I had a rattle/clunking noise that sounded like it was coming from inside the rear of the car around the back seats. It only happened on rough roads or when going over uneven pavement such as driving up onto my driveway or going over potholes.

It turns out the trunk itself was moving when the car flexed. There are adjustment bolts on each trunk hinge that are supposed to support the forward part of the trunk. The bolts on my 2021 M3 were run completely in. You could push down on each side of the forward trunk and get it to move. I slowly adjusted the bolt heads outward and repeatedly closed the trunk to make sure I was not going too far. I couldn't find any documentation on proper trunk hinge adjustment but I made sure the trunk was not preloaded on the hinge.

I have attached pictures to help.

This noise drove me crazy for a while and Tesla service couldn’t find it. It would be nice if the moderators pinned a thread for confirmed rattle and noise fixes.
 

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Interesting find. I doubt that it’s actually designed for this purpose because it’s only painted with no rubber/plastic protection so eventually it’ll be metal on metal.

However, I adjusted mine too because I’m searching for a similar rumble from back there.

I put some electrical tape on it temporarily to see if this helps.
 

Stewart

2021 MY, blue/black FSD & Tow
Dec 22, 2020
55
29
Mill Creek, WA
I have a 2021 MY and have been having a clunking noise as well. If I open the hatch and move it up and down, the left hinge rattles. I had service look at it. There’s a note indicating a seam issue and was adjusted. But the issue remains, anyone would like to open their rear hatch and see if they get movement on the left hinge?
 
Hello everyone I would just like to add that i had the same rear clanking metal on metal sound when going over some bumps and this was exactly the issue so thank you Habu! I just added some electrical tape around the bolt head shown in the second pic there and noise gone. vehicle is a 2021 model 3 sr plus. Thanks for helping us fix this most annoying rattle!
 
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Reactions: TBrownTX and Habu
I am posting this in case someone in the future may have the same problem. I searched for the source of this rattle/clunk for months with no luck.

I had a rattle/clunking noise that sounded like it was coming from inside the rear of the car around the back seats. It only happened on rough roads or when going over uneven pavement such as driving up onto my driveway or going over potholes.

It turns out the trunk itself was moving when the car flexed. There are adjustment bolts on each trunk hinge that are supposed to support the forward part of the trunk. The bolts on my 2021 M3 were run completely in. You could push down on each side of the forward trunk and get it to move. I slowly adjusted the bolt heads outward and repeatedly closed the trunk to make sure I was not going too far. I couldn't find any documentation on proper trunk hinge adjustment but I made sure the trunk was not preloaded on the hinge.

I have attached pictures to help.

This noise drove me crazy for a while and Tesla service couldn’t find it. It would be nice if the moderators pinned a thread for confirmed rattle and noise fixes.
A quick note to say THANK YOU... This clunk has been driving me nuts.
 
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Reactions: Habu
You’re a life saver @Habu ! Same car, same year, same color, same issue. It definitely sounded like it was coming from behind the rear right seats, but it ended up being the trunk bolt on the left side. I went as far as letting my fiancé drive the car on a bumpy road while I laid in the trunk with the seats down lol. It still sounded like it was coming from a totally different spot. I really appreciate it!
 
  • Like
Reactions: Habu
I have a 2021 MY and have been having a clunking noise as well. If I open the hatch and move it up and down, the left hinge rattles. I had service look at it. There’s a note indicating a seam issue and was adjusted. But the issue remains, anyone would like to open their rear hatch and see if they get movement on the left hinge?
Mine makes a weird creaking sound
 
Habu, thank you so much for posting this info. I'm so glad I found this thread! I was hearing clunking and rattle which sounded like it was coming from the rear suspension, especially on the passenger side. Found this thread Pressed on the trunk, and driver side had a little give but the passenger side had a lot of give. After I made the adjustments on the 2 bolts, the rattle and clunking is gone! Thank you!
 
  • Like
Reactions: Habu
I am posting this in case someone in the future may have the same problem. I searched for the source of this rattle/clunk for months with no luck.

I had a rattle/clunking noise that sounded like it was coming from inside the rear of the car around the back seats. It only happened on rough roads or when going over uneven pavement such as driving up onto my driveway or going over potholes.

It turns out the trunk itself was moving when the car flexed. There are adjustment bolts on each trunk hinge that are supposed to support the forward part of the trunk. The bolts on my 2021 M3 were run completely in. You could push down on each side of the forward trunk and get it to move. I slowly adjusted the bolt heads outward and repeatedly closed the trunk to make sure I was not going too far. I couldn't find any documentation on proper trunk hinge adjustment but I made sure the trunk was not preloaded on the hinge.

I have attached pictures to help.

This noise drove me crazy for a while and Tesla service couldn’t find it. It would be nice if the moderators pinned a thread for confirmed rattle and noise fixes.

To be clear... loosen the bolt just a tad, close the trunk and repeat step 1, rinse and repeat until resolved?
 

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