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I got my New K5 LXS last week. Sadly I have noticed the wind noise inside the car while driving. I know that I could play some music but come on is a 2021 vehicle with a beautiful design they should have taken care of that noise first. I owned a 2006 optima and had the same issue. I thought that 15 year later they would have find a solution!
 

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2021 Kia K5 GT
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My GT is quiet. Don't notice any wind noise.
A few other members have complained about wind noise though. Maybe it's as simple as changing the weather strip? Check with your dealer. Should fall under 1st year adjustments.
 

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2021 Kia K5 GT line Wolf Gray/Red
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I got my New K5 LXS last week. Sadly I have noticed the wind noise inside the car while driving. I know that I could play some music but come on is a 2021 vehicle with a beautiful design they should have taken care of that noise first. I owned a 2006 optima and had the same issue. I thought that 15 year later they would have find a solution!
I have a 2021 K5 GTline same problem driver side wind noise at highway speeds
 

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The seal for the window is partially soft and pliable and hard plastic. Roll your window down and you'll see what I mean, it has to be the hard plastic causing the issue. I also have the wind noise.
 

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Someone in Korea told me to check the triangle piece that's connected to your side mirror, he was able to isolate his noise issue from there.
Do you mean the piece that connects the mirror to the car? If so did he figure out how to fix the problem because it’s becoming unbearable
 

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2021 Kia K5 GT-Line FWD
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Do you mean the piece that connects the mirror to the car? If so did he figure out how to fix the problem because it’s becoming unbearable
hmm looks like he couldn't, most people over there just put sound deadening material all over the door panels and the back trunk. One guy said that rubber gasket between sidemirror and door is too small which looks to be one of the wind noise sources.
 

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2021 Kia K5 GT-Line
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hmm looks like he couldn't, most people over there just put sound deadening material all over the door panels and the back trunk. One guy said that rubber gasket between sidemirror and door is too small which looks to be one of the wind noise sources.
I had the same issue as well (also posted similar in another thread). I recently got my windows tinted and that has resolved the wind whistling noise (which starts at low speeds) about 80%. My god if I didn’t get my windows tinted, that would have been like nails on a chalkboard. I still will log a complaint with the dealership to continue to help build a database of this complaint as it doesn’t appear isolated as stated in another thread.
 

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I had the same issue as well (also posted similar in another thread). I recently got my windows tinted and that has resolved the wind whistling noise (which starts at low speeds) about 80%. My god if I didn’t get my windows tinted, that would have been like nails on a chalkboard. I still will log a complaint with the dealership to continue to help build a database of this complaint as it doesn’t appear isolated as stated in another thread.
I’m getting my windows tinted tomorrow with ceramic tint so hopefully that helps. I also called the service department for my dealership to set up an appointment for the trim around my windshield. There is a plastic piece that hold the rubber seal and it’s not even fucking glued down. Any amount of upward pressure on it lifts the rubber seal up so I’m thinking that could be part of the issue.
 

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So just took my car to the dealer. They tape up the windshield trim, mirror and driver window seals and they claim the noise stayed the same. Wouldn’t do anything. Sat there for almost three hours and all I got out of it was 40 miles less in my gas tank. The service desk worker told me this is not the first time he has heard this complaint with the k5 and he recommended calling Kia corporate service and to make a complaint so the hopefully come out with a recall on whatever it is
 

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I have a 2021 K5 GTline same problem driver side wind noise at highway speeds
I am going through EXACTLY the same thing! They said you can try lemon law but that's more trips to the shop, this and that. Dealer told me it's a manufacturer defect and I havw to take it up with Kia, didn't want to/nor suggest serving it. Idk what to do.
 

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Anyone with the wind noise problem look at the alignment of your driver door. Mine is around 1/16 to 1/8 of an inch lower than the back door and I am wondering if that might be the issue.
 

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Yep. On the driver's side, I can hear a slight whistle/leak of air at high speeds. Can't feel it though, so I guess that makes it ok.
 

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Found a TSB for the 2020 sonata for the same exact problem. Even found a video sounds the exact same. The TSB was to replace the small triangle window, drivers mirror and door seal as well as check the door alignment. Emailed Kia about it so we’ll see what happens since they are the same parts.
 

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Okay guys I think I found something. When driving if I turn the air recirculate on (the 180 degree arrow for the ac) the noise almost completely goes away and as soon as I turn it off it comes back. I’m supposed to go to dealer sometime soon so I’ll bring it up and see what they say
 

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2021 Kia K5 GT-Line AWD
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I had a similar issue in my 2016 optima. I'd hear a kind of knocking coming from the sunroof. They replaced the sunroof gasket, but it did not fix it. Turns out there are vents in the trunk I think which are supposed to exhaust air, but they were not opening properly. So, it was creating positive air pressure in the car and the sunroof was where the air was escaping. Once they fixed that I had no more problem.
 
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