[evioniq]

The road noise from the Ioniq is clearly evident by this photo of the BEV version which should be more or less the same with the hybrid models. The lack of sound deadening/soundproofing material is clearly shown, there's essentially two small pieces and nothing else.

I'm very confident that once you cover the bare metal areas with soundproofing material, even with wool or foam, there will be a dramatic difference in cabin noise. I've done a full vehicle soundproofing before so I know this to be the case and problem with the Ioniq. The only thing one might also want to do is rear tire well soundproofing.

My family member has noticed more road noise in the rear as well in our Ioniq Electric BEV.

 

[evioniq]

Here's an interesting picture I found. I'm assuming this is an Ioniq Hybrid...but it gives you an idea of what can be done.

 

[evioniq]

Fed up with the noise in the rear of my HEV with the load cover removed I tried a low cost option first. I removed the spacesaver spare and fitted a piece of carpet underlay in the floor. After replacing the spare wheel I laid another piece over the wheel and refitted the floor panel. Success- noise level appears to be the same with or without cover in place.

Interesting idea. I wonder if you would find extra noise difference in covering the compartments within the foam mold underneath the top cargo liner.

 

[evioniq]

Anyone know how to remove the plastic wheel arch well pieces so I can gain access underneath? Planning to do the rear.

 

[evioniq]

There are some screws and then some clips, it shouldn't be difficult to remove. I'm planning to do the same. You may also find it useful to have a look at the service manual here: https://docs.google.com/spreadsheets/d/1YEQiKRsAoy5DIBj_SJcduudYaCztavNdkA35jreHmV4/edit#gid=0

If you manage to do it, can you post some photos?

Sorry that link, I'm not sure how to download the service manual, it seems it is an excel sheet listing different members of Ioniq and their models?

 

[evioniq]

Sorry, wrong link.

https://drive.google.com/file/d/0B1Yaj1mhU93iYUhTLW1iRHNSQkE/view

I have the EV, but this Hybrid model service manual still has relevant parts and information. Thank you so much!

 

[evioniq]

You're welcome. May I ask a question? Why are you planning to isolate the outside of the wheelarchs instead of the interior for some reason? The photos I've seen with a complete isolation always show the isolation material in the inside part.

I'm planning to do just this as shown in the photos below. And considering the spray can solution on the panel.

Ideally I'd like to strip the interior and get to the rear wheel well arch from the inside (at least), but I don't want to go that route because of the time involved. Or maybe I may end up going that route, who really knows, I have to figure it out.

 

[evioniq]

In my case, noise seems to be quite dependand on tyre type - I have 17" and in my case I decided to change the standard Primacy 3 for Dunlop Bluresponse and the noise level went from almost unbearable to more than reasonable. In fact noise was reduced from being unable to hear the engine nose, to now being able to hear it. Not just the intensity decreased (2 dB measured with a sonometer, same road, same speed, same pressure), but the frequency composition of the noise is now also less disgusting. However I like "as silent as possible" cars so I still plan to isolate the trunk and probably the rear wheelarchs as seen in the photo above, since dissasembling the archwheel interior doesn't seem to be too difficult. I'll start with the first layer and measure again to decide on going ahead with the second.

That's very interesting because 3dB reduction is equal to 50% reduction in the power of the sound!

 

[evioniq]

I think (?) that 15" weels is way better than 17".
Have anybody tried the 15" on the ev?

15" don't fit in the rear on the EV.

 

[evioniq]

This might give someone an idea for the Ioniq Electric. Not sure about other versions.

I don't have a photo, but if you pop open the front plastic wheel well liner and look behind the wheel arch closest to the firewall, Hyundai stuffed in a rectangular (what looks and feels like) padded likely waterproof foam sound insulation. There's surprisingly more room to put in even more sound insulation material in there as the one there from the factory is squishy enough to be pushed back further in exposing now more empty space/room that you can add more insulation to cover the entire area much better than the factory did. Now the problem is I'm not sure what material one can buy to match and be suited for this specific area, it would have to be waterproof and or weatherproof, but if you're a little sensitive and annoyed at the tire/road noise, this arguably could prevent more noise from entering in the cabin, but its my uneducated guess to why Hyundai added this in this specific area in the first place.

 

[evioniq]

I guess the most effective way to reduce road noise will be to wait until you replace the stock Michelin Energy Saver A/S, however, its hard for a customer to know how quiet any particular tire is before putting them on. Unless other Ioniq owners have already swapped tires and have experience to which reduced noise more...

 

[evioniq]

Look closer, there should be insulation under the hood. A thin black sheet was installed in the 2017 and 2018 model years. You also have an engine cover, firewall insulation, and extra cost windshield with sound insulation.

Your photo is on the EV version.

Nope. Can any 2019 owners confirm?

Your photo is of the Hybrid which definitely doesn't have it. But past years did have it.