I can't figure out how this possibly could have happened, but when I got into my 2016 GX lux for the first time in 2 weeks (thanks to the quarantine), I noticed a very loud rattling sound from the roof when I closed the door.

I immediately jumped out to take a look, and it appears that part of the roof is "loose". Whenever I close one of the doors, the portion of the roof between the moonroof and the shark fin "jumps" and rattles very loudly. It's especially loud if all the windows are closed and there is an increase in air pressure as the door is closed.

I can't figure out what could be causing this, or how it could have happened when my car was just sitting in the garage....

 

Look at this thread: https://www.clublexus.com/forums/gx-...-proofing.html

The first three or four pictures show the roof and it's reinforcements. My guess is that the adhesive between the roof panel and one or more of the reinforcements has separated, allowing the roof panel to move (which it was not intended to do) when the door shuts.

 

Headliner Removal Instructions

 

I had this happen on my 2012 a couple years ago (adhesive came loose) luckily still under warranty. Dealer fixed it and no problems since.

 

Once the pandemic is over, I'm going to take it in.

I have the extended service plan, which doesn't expire for another 2 years.

 

Some interior shots of roof with headliner removed although it appears many are post sound-proofing

https://www.clublexus.com/forums/gx-...-proofing.html