My 08 LS460 makes a clunk sound when brake to a full stop. It is as if something is loose and bang down from behind. anyone has or heard of this issue?

 

Brake actuator?

 

No this metallic single clunk sound

 

As stated in the earlier post- it is your brake actuator..

 

Really brake actuator makes a thump/clunk noise like that?

 

Yes. To confirm get in your car start the engine leave it in park and jam on the brake pedal. You will here the clunk.

 

Just did it...Car idle in park + depressed brake several times..no clunk noise.

 

may i also clarify that this noise is a single "clunk" noise as if you have a ball or something in the trunk that hits the wall of the car when brake...not the series of "clicking noise" as in case of many actuator mentioned. I checked and there is nothing in the trunk and spare tires/jacks etc are secured.
There is something loose down there...I think. Taking the car in tomorrow.

 

I noticed this noise too but its the parking brake activating on mine the automatic one.

 

Please Randomwalk keep us updated
wish you the best

 

I dropped off the car at the dealer today. Got an es350 as loaner. Suspension is soooo much smoother than my ls460. Def something wrong with my suspension.

 

My car has been in the shop for the last 4 days for this strange thumping noise coming from the front (29,350 miles). No detailed diagnosis as of yet. I have been told that some special parts have been ordered, and will be late next wek before I get the car back. Will keep everyone posted. In the meantime, I am also driving an 2011 ES350 loaner. I am extremely surprised as to how quiet and zippy this car is.

 

Your noise is from the front...mine seemed to be coming from the rear...I have a feeling something is loose/broken down there...

 

i to have that thump/clunk sound in the front end of my 09 ls awd has been two months service mgr says lexus is aware of the problem parts are in the works but not released yet they re torqued all the fittings up front helped a little - had clicking sound in brakes told it was normal i told them replace brake acuator no more clicking brakes grab 100% better-now i am down to having them fix the infamous tap the window control to stop the wind noise has been in 5 time for this problem service mgr keeps adjusting better for a day then back to same problem i did the jmc fix solved the wind noise up front but not all

 

was there a tsib for the brake actuator ??