Clunking sound from the back?

[Jimbro]

Hi there. I'll need to take the car in, of course. But any ideas/experiences/thoughts on a new "clunking sound" from the back (underneath?) of the vehicle when hitting bumps in the road?

Thank you!

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[AliRafiee]

There have been a handful of threads about this. I don’t recall what the resolution was. There might be some helpful info in one of threads.
This by no means is a comprehensive list. Just a title search.

https://www.macheforum.com/site/search/3471362/?q=Clunk&c[title_only]=1&o=date

 

[Jimbro]

Thank you very much! Appreciate it!

 

[Keytone]

Hi there. I'll need to take the car in, of course. But any ideas/experiences/thoughts on a new "clunking sound" from the back (underneath?) of the vehicle when hitting bumps in the road?

Thank you!

Heading down a hill, try shifting into neutral and lightly applying brake pedal pressure. This can help clean out some sources of noise. This can become more apparent when it is quite wet outside (you have winter slush on the roads right now), particularly combined with the Brake Hold function enabled.

With regenerative braking, the brake rotors and pads don't get used as heavily as in an ICE car, possibility resulting in rust/grit buildup on the rotor, returning a thud sound on each wheel rotation as that section of rotor passes under the open pad.

A good rule of thumb would be to make physical braking a once-a-week maintenance routine.

The car's software should've been written to occasionally apply the physical brakes rather than always first using regenerative braking.

 

[Jimbro]

Thanks @Keytone! I'll give it a shot...

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