Has anyone taken apart the cx-3 to reveal sound deadening materials? - Mazda CX3 Forum
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post #1 of 19 Old 12-15-2015, 04:09 AM Thread Starter
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Has anyone taken apart the cx-3 to reveal sound deadening materials?

I remember my mazda 3 being awfully noisy. There was a lot of wind noise and the road noise was really awful. I had to sound deaden all the doors, hatch lid, trunk floor and around the wheel wells. It didn't make much of a difference. So I've heard that the new cx-3 was designed with weight savings in mind so the engineers were able to squeeze in some more sound deadening materials. Apart from that, there just isn't any proof of this being the case. Has anyone removed their door panels recently or any other panels that may have sound deadening materials underneath? Underneath the door panels should be a fibrous door material like this found in my hyundai sonata. Thanks!

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post #2 of 19 Old 12-15-2015, 04:28 AM
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I haven’t had the side door panels off (yet) but I know there is a lot of insulation inside the back door, around the bulkhead (I think you call it the firewall) and even in the most unlikely of places like the A pillar trim.

The insulation is not only there for noise but it also stops the transfer of temperature to the inside of the metal panels which would otherwise get dripping wet through with condensation. Its why the door cards on old 70s cars used to blister and delaminate. Even heavily waxed exteriors would rust from the inside. Its the same effect as putting a cold beer out in the sun on barbie days!

All modern cars have a polythene membrane stuck to the bare inner metal of the doors. That is a vapour barrier and should always be stuck back on if any work is done inside the door.
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post #3 of 19 Old 09-14-2016, 03:52 PM
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From a Japanese site, here is the inside of a door panel.

However, on another thread, there did not appear to be anything on the inside of the outer panel. Access appeared limited, but I think that's where you could make a difference.
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post #4 of 19 Old 09-14-2016, 06:42 PM
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Originally Posted by anchorman View Post
All modern cars have a polythene membrane stuck to the bare inner metal of the doors. That is a vapour barrier and should always be stuck back on if any work is done inside the door.
Didn't find such thing on my car.
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post #5 of 19 Old 09-14-2016, 06:47 PM
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Originally Posted by mainemanx View Post
From a Japanese site, here is the inside of a door panel.

However, on another thread, there did not appear to be anything on the inside of the outer panel. Access appeared limited, but I think that's where you could make a difference.
I don't remember exactly but I think my EU spec car didn't have as much insulation on the upper part of the door panel.

I did add some Silent Coat everywhere I easily could.
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post #6 of 19 Old 09-14-2016, 07:53 PM
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Originally Posted by JPA View Post

I don't remember exactly but I think my EU spec car didn't have as much insulation on the upper part of the door panel.

I did add some Silent Coat everywhere I easily could.
Looks good ... could you hear any difference?

What's on the back of the panel you took off ... anything?
P.S. Dealer says my CX-3 is here early ... now supposed to be delivered tomorrow ... yea

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post #7 of 19 Old 09-15-2016, 07:22 AM
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Looks good ... could you hear any difference?

What's on the back of the panel you took off ... anything?
P.S. Dealer says my CX-3 is here early ... now supposed to be delivered tomorrow ... yea
You can hear the difference especially when driving on wet roads. Much less humming coming through the door.
It also improves the low frequency sound reproduction of the speakers.

On back of the door panel there was that white fleecy stuff that is shown on picture that mainemanx posted.

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post #8 of 19 Old 09-15-2016, 11:17 AM
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Quote:
Originally Posted by JPA View Post
Didn't find such thing on my car.
It doesn’t need it on that door as there is a complete closure of the door (very unusual). The back of that plastic clamshell is the barrier.
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post #9 of 19 Old 09-15-2016, 11:36 AM
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It doesn’t need it on that door as there is a complete closure of the door (very unusual). The back of that plastic clamshell is the barrier.
Agree on unusual complete closure ... very impressive, "all bolted up."
Also, delivery today
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post #10 of 19 Old 09-15-2016, 01:04 PM
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The CX-3 has sound deadening material? Where? LOL

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