sat22

Hello friends !
I'm the proud owner of a 2008 RX350 with low mileage (40,000 miles - US model).
I purchased it a year ago and I haven't had any mechanical problems. However it's been 3 months that I have this rattle from the rear, especially when driving over uneven pavement.

I had the vehicle checked by a local mechanic but he couldn't find any loose part at the exception of the spare tire plastic cover underneath that looked a bit flimsy but he couldn't tell for sure...
I even did an oil change at a Lexus dealership and they didn't find anything when they hoisted the car but they didn't look hard either....

I've disconnected the tonneau cover and put the release latches, for the tonneau, in the lock position (towards the front of the vehicle). That didn't solve the problem. Lastly I removed my plate cover and still didn't resolve it.

Anyway, the rattle seems to come from somewhere underneath, around the trunk area and is loud when you hit bump or drive on uneven road and it's driving me crazy!
I wanted to know if anyone has experienced it. I appreciate your input.

litzdog911

Is the spare tire/wheel securely attached? What happens if you remove the spare tire/wheel and cover, then drive it around? That might help you isolate the source of the noise.

sat22

The spare tire/wheel and cover were inspected and securely attached. My local mechanic did it in front of me...It was as tight as it can be so I didn't remove it as I figured that it couldn't be the problem...

nwfsnake

Has your plastic gas tank shield come loose in the front? This is a common problem. 1/4" double sided trim tape will fix it in 5 minutes. Do a search if you need more info.