Hey guys I recently bought a 350z a month ago, It has always had the bad rattle when i let off the gas at around 3k~ RPM but this other weird noise recently started to appear around a week or two ago. It gets louder the longer I drive the car.

Heres a video any help would be greatly appreciated. I put it on the lift once and I think I have a different Y-Pipe but wasn't able to determined exactly what brand.

Im putting it up on the lift again tmro and im gonna look closer. Thank you!

e/ My CEL is due to messed up bank 1 O2 sensors

 

i am not a mechanic but you should make a better video, like underneath the car, engine bay etc.

Did you already check exhaust rattle?

 

How many miles do you have on your car? If I may ask?

 

85000 now

 

Is the noise coming from the engine, trans, exhaust, or what? It may just be something vibrating but hard to say

 

If you already have an exhaust noise, it may be related. Have it checked out somewhere.

 

Problem solved I will post pictures and the solution shortly in another thread