Gina5270
Posts: 1
Joined: Wed Apr 15, 2020 8:30 am
Delivery Date: 15 Apr 2020

2017 Leaf makes a clunking noise

Wed Apr 15, 2020 8:35 am

I have a 2017 Nissan Leaf and while it is parked and turned off in the garage, every now and then it make a dull clunking sound. Is this anything to be concerned about?

powersurge
Posts: 1743
Joined: Wed Oct 21, 2015 10:24 am
Delivery Date: 06 Dec 2014
Location: Long Island, NY

Re: 2017 Leaf makes a clunking noise

Thu Apr 16, 2020 3:23 am

Unless it has a case of gas.... Why would it be concerning?

LeftieBiker
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Re: 2017 Leaf makes a clunking noise

Thu Apr 16, 2020 5:04 am

Let's cut back on the unhelpful responses, please. I'd also be concerned under the above circumstances.
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jjeff
Posts: 2177
Joined: Wed Jan 13, 2016 9:10 am
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Leaf Number: 422121
Location: MSP MN

Re: 2017 Leaf makes a clunking noise

Thu Apr 16, 2020 5:21 am

I'm guessing it could be a periodic checking or charging of the 12v battery, from the traction battery?
Is the car plugged in when you hear the clunking? not that it would make a difference but it might help for troubleshooting.
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OrientExpress
Posts: 1586
Joined: Sun Aug 08, 2010 12:22 pm
Delivery Date: 10 May 2011
Leaf Number: 2331
Location: San Jose, Ca

Re: 2017 Leaf makes a clunking noise

Thu Apr 16, 2020 8:02 am

Sometimes the ABS system will cycle itself during cold startups. This makes a groaning clunking sound from the front of the car for a few seconds. This is a normal occasional sound.
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goldbrick
Posts: 1028
Joined: Tue Aug 01, 2017 3:33 pm
Delivery Date: 01 Aug 2017
Leaf Number: 311806
Location: Boulder, CO

Re: 2017 Leaf makes a clunking noise

Thu Apr 16, 2020 10:51 am

I've never heard my 2017 make those sort of noises but a few things come to mind...as mentioned, it could be a relay switching on/off for some reason, eg to charge the 12V battery. Another possibility would be some sort of thermal shift as parts cool. I don't know what could get hot enough to cause that but on an ICE car it's not uncommon for the muffler, etc to pop occasionally as it cools and contracts.

PrairieLEAF
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Delivery Date: 04 Feb 2019
Location: Weld County, Colorado

Re: 2017 Leaf makes a clunking noise

Wed Apr 22, 2020 4:35 pm

I just witnessed it when I was working in the garage today. Some clunking sounds, with only the third, blue dash charge light flashing (car unplugged). Perfectly normal operation--it's just adding some charge to the 12V battery, as mentioned.
2016 LEAF S-30 w/QC "Lexie"

LeftieBiker
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Re: 2017 Leaf makes a clunking noise

Wed Apr 22, 2020 4:56 pm

I imagine that in order to run the DC-DC converter to add charge to the 12 volt battery, then the main contactors have to close. That probably is the source of the sound.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

GaleHawkins
Posts: 403
Joined: Sat Oct 26, 2019 5:24 pm
Delivery Date: 15 Oct 2019
Leaf Number: 311365
Location: Murray KY

Re: 2017 Leaf makes a clunking noise

Thu Apr 23, 2020 5:20 pm

LeftieBiker wrote:
Wed Apr 22, 2020 4:56 pm
I imagine that in order to run the DC-DC converter to add charge to the 12 volt battery, then main contactors have to close. That probably is the source of the sound.
That sounds feasible. When I totally kill the power when wait for the wife to get off from work I hear sounds sometimes and just assumed it is a relay that is unloading, etc.

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