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Discussion Starter #1 (Edited)
Does anyone notice a somewhat steady buzzing sound from the car when it is parked and off in your garage or parking space when it’s really quiet outside? It’s kind of like the noise fluorescent light bulbs make when turned on.

I checked some Prius forums and it appears to be normal for that car.
They said it's the fuel evaporation leakage check or something.

I’ll have to check the manual to be sure else I need to go see my dealer.
 

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Dj1, how loud is it? I have incredibly sensitive hearing, hate that fluorescent buzzing sound, and have an attached garage, so...
 

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Discussion Starter #6
Dj1, how loud is it? I have incredibly sensitive hearing, hate that fluorescent buzzing sound, and have an attached garage, so...
It’s not very loud. I’m told I have dog ears and hear almost anything. It definitely didn’t last more than 15 minutes and I only heard it when I went to the garage. You’d have to be really trying to hear it though.

Idk if we can post YouTube videos here but about 12 seconds in you’ll hear it on a truck but it’s very similar. https://youtu.be/GP0jOi-ziSM
 

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Helpful! It's the kind of gotcha that one doesn't even think about — and discovers later! I once returned a computer because it made a high-pitched noise!
 

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I just heard the same exact sound in my 2019 insight. Im hoping it's the fuel evap test I've read about in other vehicles, but some confirmation would be nice.
 

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Discussion Starter #9
It should be as that’s what mine was, confirmed in the manual by Mr Natural..
 

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Buzzing while parked

Nothing unusual with my Touring ( love it - none of the problems listed above) but last couple of days , after parking my car in my garage - a weird buzzing , electrical humming was coming out of the back of my car . When I opened my trunk the buzzing was louder. I started the car and after that the buzzing disappeared. I’m thinking it’s either the sound system or , worst, the battery ... Anyone else experiencing the same issue?
 

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Discussion Starter #11
Nothing unusual with my Touring ( love it - none of the problems listed above) but last couple of days , after parking my car in my garage - a weird buzzing , electrical humming was coming out of the back of my car . When I opened my trunk the buzzing was louder. I started the car and after that the buzzing disappeared. I’m thinking it’s either the sound system or , worst, the battery ... Anyone else experiencing the same issue?
Yes. It’s normal. It should be the vacuum pump inside the fuel evaporation leakage check module.
 

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Nothing unusual with my Touring ( love it - none of the problems listed above) but last couple of days , after parking my car in my garage - a weird buzzing , electrical humming was coming out of the back of my car . When I opened my trunk the buzzing was louder. I started the car and after that the buzzing disappeared. I’m thinking it’s either the sound system or , worst, the battery ... Anyone else experiencing the same issue?
Probably this?...

https://www.gen3insight.com/forum/7-2019-honda-insight-general-discussion/256-odd-buzzing-sound-when-car-off-idle.html?highlight=Garage+noise
 

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Nothing unusual with my Touring ( love it - none of the problems listed above) but last couple of days , after parking my car in my garage - a weird buzzing , electrical humming was coming out of the back of my car . When I opened my trunk the buzzing was louder. I started the car and after that the buzzing disappeared. I’m thinking it’s either the sound system or , worst, the battery ... Anyone else experiencing the same issue?
One time only - I went into garage hours after shutting off car and heard buzzing at back of car. Decided it was probably coming from gas cap - uh oh! So I pressed the gas open button, sound went away - maybe I also had to first open gas cap. Anyway, that's the only time.
 

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Humming sound coming from trunk. Car is off

Hi, I'm the guy whose brand new 2019 Insight was towed to the dealer the first day after I bought it. The car has been running great for the last 6 months and 6K+ miles.

Today, however, I noticed a humming sound coming from the driver's side trunk area while the car was turned off in my garage. The car had been parked there for several hours. It sounded like a small motor whirring away. I backed the car out of the garage, shut the car off and the sound stopped. Weird.

Does anyone know if there might be a motor of some sort located there causing this sound?

Thanks in advance.
 

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Hi, I'm the guy whose brand new 2019 Insight was towed to the dealer the first day after I bought it. The car has been running great for the last 6 months and 6K+ miles.

Today, however, I noticed a humming sound coming from the driver's side trunk area while the car was turned off in my garage. The car had been parked there for several hours. It sounded like a small motor whirring away. I backed the car out of the garage, shut the car off and the sound stopped. Weird.

Does anyone know if there might be a motor of some sort located there causing this sound?

Thanks in advance.
Glad to hear your car has been running well after initial incident. I think the noise you're hearing is the Evaporation Leak Check Module. There's a (very) small blurb on it on pg 14 of the Owners Manual, and additional context earlier in this thread:

"After shutting off the engine, you may hear certain noises coming from the vehicle. Noise from Under Vehicle: This noise is caused by the vacuum pump inside the fuel evaporation leakage check module (ELCM). Depending on conditions, the pump will come on for about 15 minutes about 5 to 10 hours after engine shutoff. This noise is just normal vehicle operation and don’t indicate a vehicle problem."

 

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All normal -- You should here it when two cars are going at the same time !! The wifes Subaru has the same system and if we both park around the same time... 5 hrs later it can be a bit noisy in the garage!
 

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Wow, Thank you both so much for your very quick response to my question. I sure am relieved to learn that this sound is normal. All the best and thanks again!
 

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Hi, I'm the guy whose brand new 2019 Insight was towed to the dealer the first day after I bought it. The car has been running great for the last 6 months and 6K+ miles.

Today, however, I noticed a humming sound coming from the driver's side trunk area while the car was turned off in my garage. The car had been parked there for several hours. It sounded like a small motor whirring away. I backed the car out of the garage, shut the car off and the sound stopped. Weird.

Does anyone know if there might be a motor of some sort located there causing this sound?

Thanks in advance.
There aren't too many things back there to make noise. Fuel pump, battery fan, evap system. I wouldn't worry about it unless it lasts more than 15 minutes. Our cars use a pressurized fuel system, and as the pressure changes from sitting, the system may kick in to adjust the pressure. (It's the same reason why you have to hold the fuel release button, rather than just being able to open and fill).
 

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Attaching a sample video clip what the normal 'buzzing' sounds like when the ELCM runs on a Clarity, for cross-reference:

 
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