subdjoe
Posts: 1
Joined: Sat Mar 27, 2021 10:52 am
Delivery Date: 27 Mar 2021

Odd Noise With ePedal Engaged

Sat Mar 27, 2021 12:31 pm

We just picked up our 2021 Leaf Thursday evening. We were just out for a drive, had the e-Pedal engaged. Put down the passenger-side rear window and was hearing a thutter, about like a Huey UH-1 that we didn't hear with the window up. It started at about 20 mph and got louder and faster as we went to 45 mph. Is this just breaking it in? Or is it an item of concern?

LeftieBiker
Moderator
Posts: 16920
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Odd Noise With ePedal Engaged

Sat Mar 27, 2021 1:15 pm

I made the title more specific. Welcome to the site. That issue doesn't ring a bell with me, except like sounding like a nail in a tire.
Brilliant Silver 2021 Leaf SV40 W/ Pro Pilot & Protection
2009 Vectrix VX-1 W/18 Leaf modules, & 2 lithium E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

knightmb
Posts: 926
Joined: Mon Jan 12, 2015 7:41 pm
Delivery Date: 26 Feb 2021
Leaf Number: 306291
Location: Franklin, TN

Re: Odd Noise With ePedal Engaged

Sat Mar 27, 2021 1:40 pm

subdjoe wrote:
Sat Mar 27, 2021 12:31 pm
We just picked up our 2021 Leaf Thursday evening. We were just out for a drive, had the e-Pedal engaged. Put down the passenger-side rear window and was hearing a thutter, about like a Huey UH-1 that we didn't hear with the window up. It started at about 20 mph and got louder and faster as we went to 45 mph. Is this just breaking it in? Or is it an item of concern?
Aerodynamics, does that in many cars when you roll down the rear window of any vehicle. You've never noticed that in other vehicles before? :?:
2020 Leaf SL Plus - (Manufacture Date March 2020)
2013 Leaf SV (8 faithful years of service before trade in at 75,679 miles)

PrairieLEAF
Posts: 200
Joined: Tue Sep 10, 2019 8:58 am
Delivery Date: 04 Feb 2019
Location: Weld County, Colorado

Re: Odd Noise With ePedal Engaged

Sat Mar 27, 2021 3:22 pm

Yes--apparently, it's called Helmholtz Resonance!

It sounds like aerodynamic cars are especially susceptible.

https://www.caranddriver.com/news/a1534 ... ar-window/
2016 LEAF S-30 w/QC "Lexie"

henrydehoja
Posts: 116
Joined: Sun Sep 16, 2018 6:40 pm
Delivery Date: 12 Sep 2018
Leaf Number: 317129
Location: Metro Boston, MA

Re: Odd Noise With ePedal Engaged

Sat Mar 27, 2021 6:26 pm

Welcome!

As mentioned, it sounds like an effect of aerodynamics.
I have seen it in my 2018 Leaf and 2018 Odyssey. It's worse on my Leaf than on my Odyssey.

I control it on my Leaf by either:
* Opening the front passenger window slightly, while having both rear windows opened. I do this when taking my dogs out for a drive.
* Opening the front passenger window about 1/2 way, while having the rear passenger window opened.
2018 Nissan Leaf S w/QC
Placed in action: 9/2018

LeftieBiker
Moderator
Posts: 16920
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 30 Apr 2018
Location: Upstate New York, US

Re: Odd Noise With ePedal Engaged

Sat Mar 27, 2021 7:28 pm

I'm familiar with it too, but I've mainly encountered it with all or most windows close to wide open. I didn't associate it with one window being rolled down.
Brilliant Silver 2021 Leaf SV40 W/ Pro Pilot & Protection
2009 Vectrix VX-1 W/18 Leaf modules, & 2 lithium E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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