My 2015 GS350 RWD (69,000 miles) developed a clunking noise coming from the rear suspension. After reading that the typical cause was the stabilizer links, I replaced them with aftermarket MOOG links. After one wee, the clunking was back.
I didn't find anything else loose on the rear suspension. I replaced the links again today with Lexus parts, and there was a substantion reduction in the clunking yet it still persists, just less frquently. .
Coud the shocks be making this noise? I''d like eliminate this sound. The car is relatively quiet with this exception. Thanks.
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It could be bar mounts themselves.

You could remove one link entirely and drive it cautiously over some noise inducing bumps to isolate.

 

Are you 100% sure its your suspension? Myself and a lot of others have thought the same thing, a rear suspension problem, when it was actually an old/faulty sunroof glass seal causing the glass to bobble at slow speeds while going over bumps. If your sound is a mild clunking bobbling sound happening at slow speeds, over speed bumps, in and out of driveways, situations like that, my money is on your sunroof seal.

 

moonroof tilted, no sound
then moonroof seal needs replacing
if sound, keep looking

My rear suspension clunk turned out to be my rear end links, just had to make sure they were tight after the initial installation.

 

Hi I’m new here and I’m not sure where to ask about this but my rear passenger tire is leaning inward to the top and making a clunking and grinding noise when I hit bumps or turn can someone tell me which parts it is that I need to buy to fix this

 

I wanted to give a big shout out of thanks for this suggestion. Recently purchased a ‘14 ES with 64k. That rear clink was driving me insane. Local shop wanted 2k for new strut’s replacement. I quite literally removed, replaced, and re installed the rear struts with zero resolution to the issue. Took the chance on a 48 dollar gasket on eBay and had the sunroof installed in less than an hour with just A T-25 nut driver,Thanks again and Cheers!


Description is Glass assembly weatherstripping
*Lexus Part number is 63251-30100 if anyone runs into this issue.

 

I have a 2013 Lexus GS350 AWD with the same clunking sound in the rear. I replaced the rear shocks and the sun roof seal, but the clunking sound is still there. What else could it be?

 

Where the shock mounts replaced also, and sway bar links and bushings inspected and/or replaced?