2017 Kia Sportage Ex AWD shh noise when starting

Asked by Lisa Feb 20, 2025 at 10:16 AM about the 2017 Kia Sportage EX AWD

Question type: General

Hi all. I bought my Sportage a few weeks ago and
I've noticed a shhh/hissing noise when I start it. It
seems to be louder when it's colder outside, but
not as loud when it's about 40° or higher.

3 Answers
311,525

Gene answered 2 months ago

Does it go away when it reaches operational temperature? If so, it could be a low fluid warning, transmission, steering etc. I suggest you have it checked over before something bad happens. Remember it is a KIA so anything can happen at any time.

1 people found this helpful.
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158,655

James answered 2 months ago

If it sounds like it's coming from under the dash you may have a vacuum leak in the heater/air conditioner system that leaks down when you shut off the engine. Then when you start the engine the next time it refills so to speak. Jim

Mark helpful

Lisa answered 2 months ago

If I were sitting in my car with the door closed and I started, I don't really hear the noise inside. I noticed when I had my door open and was halfway in starting my car to warm it up.

Mark helpful

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