Could anyone please tell me what's the purpose of the metal cube in the trunk (on the passenger side) is, and if it's safe to remove it?
I'm attaching a picture to help with identification of this component.

Araphel

 

I wouldn't, although there's not real "harm" in doing so.

That's a harmonic chassis weight, used to deaden vibration from the road. I can't say for sure but I'd guess if you remove it, there's going to be some additional NVH. It's there for a reason - trust Nissan engineering.

There's usually two in the car, one in front somewhere, and the one in back. I'd even venture a guess that a JDM (right hand drive model) has the same.... on the left side of the car to distribute weight more evenly.

Up to you. I don't need no steenkin' harmonics, thanks.

 

Thank you for your answer MicVelo!

 

 

Haha, this is great

 

KInda looks like a government listening device.

 

Quick, get your tinfoil hat on on!

 

Better late than never.