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If you hear for it, do you get rear subwoofer or any kind of rattle in your 2019?

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Hey guys I bought a new 2019 Mazda 3 in IL, premium.

When I got the car I noticed the bass was maxed out and it had 50 miles worth of test driving done in it. I am pretty easy going person but when it comes to things that don't belong, LIKE small rattles/vibrations coming from the housing, sub, metal in the back of my car it consumes my mind. ( personal problem)

I bought the car because the stock spear system was supposed to be great. So far I'm happy with it but some songs cause my sunglass compartment, parts of my sunroof and rear of the vehicle to rattle a bit. I have to believe there is a fix for this and my mind thinks FOAM.

The rear sub seems to be the biggest culprit but my dealer won't replace the damn thing because they "can't duplicate" the problem. Really they just don't think its that big of a deal but when you spend 30,000 on a vehicle brand new you expect it to work flawlessly. And I do.

1. Has anyone had success talking to Mazda Corporate about replacing something like this? Are there any words I can use to show them I am displeased so I can get this sub fixed? I tried getting my dealer mechanic to tighten the housing but that didn't seem to do anything.

2. IF plan 1. doesn't work, has anyone had similar issues and what did you do to fix it. I imagine there has to be some sort of adhesive foam that you can tape to potentially rattly parts.

3. If it comes to it and I have to fix the sub myself, does anyone have an resources for accomplishing such a task?

Finally, don't know if I'm even asking the right questions I'm just looking for some direction here. I want the car to be flawless and I understand dealerships aren't going to take the time to fix every little thing. That being said I know I'm going to have to put some work into it, so where do I start??

Any advice is welcome. Thank you
 

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Have you found a fix for this? I currently have the same issue with the rear sub shaking either the window or the entire rear and its annoying the crap out of me, not even blasting music and its noticeable.
 

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That's resonance, will happen in all vehicles at certain frequencies. All you can do is apply sound/vibration dampening foam/material to affected areas and go from there.
 

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audio fan here...

if you really want to stop the rattle, it can be a project... this is one that ill hopefully tackle pretty soon myself.
(2010 hatch with subs)...

basically you have to take the panels off the car and add cld tiles... these stop the panels from making vibrating noises..

then you should put Close cell foam inbetween the metal and plastic parts to keep them from vibrating...
 

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the plastic housing below my rear sub rattles a lot. When I put pressure against it, it rattles. The sub itself looks really really cheap. Sub-par Bose quality here.
 

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2020 Mazda 3 Sedan W/Preferred package
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Have the same exact issue with my 2020 sedan, the Bose Sub on the rear deck makes a bit of a rattle, especially during certain bass frequencies. Can't seem to tell if its the trunk area around it that's rattling or the sub itself It also seems to hardly work during other frequencies which annoys me a lot as I listen to music all the time in my car. I plan on going to an audio shop nearby in a few days to get their opinion on it, maybe see about adding some sound dampening stuff to help with rattle
 

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Hey guys I bought a new 2019 Mazda 3 in IL, premium.

When I got the car I noticed the bass was maxed out and it had 50 miles worth of test driving done in it. I am pretty easy going person but when it comes to things that don't belong, LIKE small rattles/vibrations coming from the housing, sub, metal in the back of my car it consumes my mind. ( personal problem)

I bought the car because the stock spear system was supposed to be great. So far I'm happy with it but some songs cause my sunglass compartment, parts of my sunroof and rear of the vehicle to rattle a bit. I have to believe there is a fix for this and my mind thinks FOAM.

The rear sub seems to be the biggest culprit but my dealer won't replace the damn thing because they "can't duplicate" the problem. Really they just don't think its that big of a deal but when you spend 30,000 on a vehicle brand new you expect it to work flawlessly. And I do.

1. Has anyone had success talking to Mazda Corporate about replacing something like this? Are there any words I can use to show them I am displeased so I can get this sub fixed? I tried getting my dealer mechanic to tighten the housing but that didn't seem to do anything.

2. IF plan 1. doesn't work, has anyone had similar issues and what did you do to fix it. I imagine there has to be some sort of adhesive foam that you can tape to potentially rattly parts.

3. If it comes to it and I have to fix the sub myself, does anyone have an resources for accomplishing such a task?

Finally, don't know if I'm even asking the right questions I'm just looking for some direction here. I want the car to be flawless and I understand dealerships aren't going to take the time to fix every little thing. That being said I know I'm going to have to put some work into it, so where do I start??

Any advice is welcome. Thank you
Noticed same rear glass vibration issue on the 2021 sedan. I think Centerpoint, if you have it, may help disperse the bass more evenly to all the speakers. I'd be interested in adding some dampening to the rear area if we can figure out the best location.

As for the sunglasses holder, I've noticed I get an annoying vibration anytime I leave glasses in there. Usually it's Ray Bans with glass lenses that resonate. The problem seems to follow me in whatever car I own, so I just mostly stopped using that space to store glasses. Anyone try a foam insert or some such in the sunglasses holder to solve that issue?
 

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I noticed one of the push type retaining clips had come out on the underside of the trunk area in my sedan. I chipped it trying to put it back in, so I ordered a pack of 40 since I already noticed another clip missing from another location. I think I'm noticing a connection between vibrating parts and where there was a clip missing. Either way for anyone experiencing a trunk area rattle on a 2019+ sedan, strongly recommend going back there and checking that all the push clips are properly secured. Same for in the spare tire well area.

 

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I noticed one of the push type retaining clips had come out on the underside of the trunk area in my sedan. I chipped it trying to put it back in, so I ordered a pack of 40 since I already noticed another clip missing from another location. I think I'm noticing a connection between vibrating parts and where there was a clip missing. Either way for anyone experiencing a trunk area rattle on a 2019+ sedan, strongly recommend going back there and checking that all the push clips are properly secured. Same for in the spare tire well area.

And were you able to remove the deck completely?
 

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Oh, nah. Just replaced these clips behind the seat. The one on the right is the one that was missing originally. And there was one behind that empty hole that was missing too which can be seen from the trunk.

View attachment 279652
Ah, this does not seems like the origin of my rattles. I need to un-do the "deck", but I am unable to find any guide for BP yet.
 

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To solve my Bose rattles with some kind of insulation.
Where would you like to install insulation, underneath the deck? Could you not install it upside down from the trunk?

I noticed some form of insulation in the spare wheel well along the frame of the car. Maybe that would be a better place to reinforce with a bass trap of some sort?

What kind of insulation are you looking at? I may follow your lead. It's kind of crazy how minimal all the engineering is to get things light.
 

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Where would you like to install insulation, underneath the deck? Could you not install it upside down from the trunk?

I noticed some form of insulation in the spare wheel well along the frame of the car. Maybe that would be a better place to reinforce with a bass trap of some sort.
The problem fom my point of view is, that the plastic deck is rattling against the steel body frame. I want to put something between that.
 

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The problem fom my point of view is, that the plastic deck is rattling against the steel body frame. I want to put something between that.
Could you do me a favor when you have a minute and post a picture that looks like this and shows the entire length of the top rear of the trunk?

279658
 

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This is the particularly nasty one that was missing and harder to access than the others. You have to remove the missing clip from the first pic (the one from the cabin with the seat down) to insert the second clip. If there's no clip coming thru where those red circles are, you're missing a vital retainer on that side.
279660
 

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What's surprising is how important a single clip appears to be in preventing any given vibration. At first I thought it was the sub, but I can hear it with no audio playing, just from road vibrations coming into the car. I'll be curious if I can still hear buzzing after replacing the 2 missing clips. Makes sense on one level that a car that's trying to cut down on weight to the Nth degree would have a single, tiny piece of plastic have such a limited, yet critical role.
 
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