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      02-10-2020, 10:22 PM   #1
E92TiAg335i
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Rear windshield rattle?

Hey guys.

Recently picked up a mint sub 40k mile 1 owner M4 from major dealership.

Car is super clean, however, under heavy acceleration/deceleration, i noticed the car makes a TON of rattle noises from the rear window.

Anybody know how to fix this/what could be causing this?
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      02-10-2020, 11:44 PM   #2
stealth4
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Quote:
Originally Posted by E92TiAg335i View Post
Hey guys.

Recently picked up a mint sub 40k mile 1 owner M4 from major dealership.

Car is super clean, however, under heavy acceleration/deceleration, i noticed the car makes a TON of rattle noises from the rear window.

Anybody know how to fix this/what could be causing this?
In my case with my f82 it's the housing around the brake light which can be fixed if you put some felt tape around the seal or make sure you back seats are fully latched.
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      02-10-2020, 11:49 PM   #3
MIA_F80
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Quote:
Originally Posted by E92TiAg335i View Post
Hey guys.

Recently picked up a mint sub 40k mile 1 owner M4 from major dealership.

Car is super clean, however, under heavy acceleration/deceleration, i noticed the car makes a TON of rattle noises from the rear window.

Anybody know how to fix this/what could be causing this?
Happened to mine twice and both times it was one of the tires having uneven thread, as you accelerate it rattles all the way back to the car. Check the tires, almost positive that's the case.
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      02-11-2020, 06:07 AM   #4
E92TiAg335i
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Originally Posted by MIA_F80 View Post
Quote:
Originally Posted by E92TiAg335i View Post
Hey guys.

Recently picked up a mint sub 40k mile 1 owner M4 from major dealership.

Car is super clean, however, under heavy acceleration/deceleration, i noticed the car makes a TON of rattle noises from the rear window.

Anybody know how to fix this/what could be causing this?
Happened to mine twice and both times it was one of the tires having uneven thread, as you accelerate it rattles all the way back to the car. Check the tires, almost positive that's the case.
I'll check but they're brand new
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      02-16-2020, 04:39 AM   #5
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Could be the black plastic pieces above the seats that you can flip up to reveal a hook (maybe for baby seats).. Installing a piece of felt tape in between the edges and on top of the hook can help.

Or for me, my dash cam installer, when tucking the wires away on the rear right corner of my car hastily put back a section of the C pillar back incorrectly, leaving part of it unhooked on the inside so it rattled during my cold starts until I went back to re-adjusted it. Now it's solid and rattle free again.
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      02-16-2020, 04:48 AM   #6
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I’ve had the majority of my car’s rear seat interior apart to fix all of the rattles. I found noises around the third brake light cover, the speaker grills, the child seat anchors, the c-pillar trim, the seat latches, the backrest anchors, the entire rear deck lid, and even the airbag mounts.
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      02-18-2020, 04:47 PM   #7
lawrence1
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Quote:
Originally Posted by FlyingLow78 View Post
Iíve had the majority of my carís rear seat interior apart to fix all of the rattles. I found noises around the third brake light cover, the speaker grills, the child seat anchors, the c-pillar trim, the seat latches, the backrest anchors, the entire rear deck lid, and even the airbag mounts.
Is there anything that WASNíT rattling back there?
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