Hey there new to the forum. I have a 2018 cx-5 GT
Just wondering if anyone has had this issue. About 3 weeks ago when I got into my car I head this popping noise from what sounded like the seatbelt buckle area. Didn’t think much of it. Then I would hear a pop noise when I would lift my back off the seat back. I then could make it happen pressing into the seat it would make a clicking popping type noise from what sounded like the right bolster of the seat back. I could feel it also. The noise would get worse or less depending on how much the lumbar was extended. If it was all the way out it would be noticeable. About half it would be very loud, and all the way deflated let’s say (I know it’s mechanical). The left bolster would have a ticking noise. I can adjust my lumbar so it’s not that noticeable but it always makes a popong noise when you get in the car and get out unless you really try to make it happen. You can also grab the side bolster and make it make the noise. I did unzip the back of the seat and moved the bolster and I couldn’t really see anywhere that would cause it seems like it’s catching on something.
I’ll try to post a video to hear it. I have a appointment next week to get it looked at also.

Video link

 

 

Leather seats or cloth set?

 

 

May not fix your problem, but i've seen similar issues on the old shape CX-5, get some leather cleaner & clean in the groove between the side panels/bolsters & back panel.

 

 

You have the two outer cushions/bolsters and the main upright back panel that you lean against. Clean the seam between the leather panels.

https://pictures.dealer.com/p/perrym...y=resize&w=650

 

I learned real quick that Mazda's interiors are often loud and creaky and yours seem to be no different. I own a 2016 CX-5 GT that has been plagued by interior issues, much like yours but worse. You can try cleaning in between the seats like someone else mentioned, but I feel with a year old car you really shouldn't have to do anything. Just take it to the dealer and have them look at it. For me, they added foam under my seats, under my center console, doors, you name it. The car has been super quit ever since. A lot of this does depend on your dealer though. I just don't think you should have to do anything on a 1 year old car yourself.

Good Luck!