sy02

I have IS 350 2006, there is rattling noise on right front passenger side before its not sound loud but now its getting louder than before because even I'm driving on uneven road you will hear the rattling noise, the sound is like there is something loose under, I already went to Lexus specialist mech. he check already the susp./shock/bushing/joints he can not trace the noise. any idea/suggestion. TNX!

panda08

iTrader: (1)

a video of the sound would help a lot

sy02

the sound is like loose and its banging in the body

Gville350

iTrader: (10)

Is it only when you hit a bump or pothole? I would check the upper balljoint to see if it popped out of the UCA.

sy02

No,maybe because the sound is like their is popping out. there is a noise on bumpy / wavy road you will hear the sound of the popping sound, before the sound is very minimal now you will really hear it. I don't know why my mechanic did not know or see that upper balljoint, I'll double check that again, tnx! What is UCA?

sy02

No, you can hear on bumpy/rough/uneven road, I don't hear it on pothole. its a popping out sound

mike33

iTrader: (1)

I had a similar noise happen on my driver front about 9 months ago. The noise was most noticeable on a washboard type of road surface... I Inspected the front end completely and could not find where it was coming from, I even replaced the lf lower ball joint out of frustration. It was driving me crazy! Took it to a friends shop for his inspection and he could not find anything either... His best guess was maybe there was something internal in the shock causing the noise. I was going to put BC coilovers on anyway so this was a good time to do it... Problem solved, no more rattling... So for me it was definitely the shock. I was surprised because Ive never heard a shock rattle and pop like that, and my car only had 37k miles...

Gville350

iTrader: (10)

Upper Control Arm. Notice how the ball joint from the factory is just pressed into the UCA; a good-sized pothole can pop that ball joint out of the UCA (happened to me).

pmanliu

iTrader: (4)

Would it be possible for a popped out UCA have the sound only when stopped with brakes and disappears when the car starts moving?

sy02

tnx, i'll check on that. The sounds really frustrating.

sy02

thanks for the picture

sy02

the noise is coming from the top strut but anyway I end up changing my 4 shocks to Megan EZ coilovers yesterday, the ride feels firm and sporty ride, better NO MORE NOISE

pmanliu

iTrader: (4)

Did you have this noise only when the car was moving, only when the car was stopped (in D), or both? Reason I ask is because i have the same knocking sound from the passenger side, only when the car is stopped. I spent a hour under the car yesterday but no luck. I will inspect the top strut next, but what exactly was wrong with yours?

Thanks!

sy02

the noise was when I'm driving on uneven/wavy road when my tire is going up/down. the problem with mine is the top strut its inside the strut you cannot see from outside they need to disassemble the strut to see it. when do you really hear the noise and like what kind of noise, did you go to mechanics already to check, maybe you need to check your bushings under because you said only when you stopped