deadbolt67

Hi folks,

My wife drives a 2010 RX450h and about two days ago it developed a squeak that seems to be coming from the rear passenger side wheel. It only happens when you are decelerating. It does not occur when you're pumping the brakes sitting still or even when driving slowly. I noticed a few posts about the emergency brake cable on the 2010s causing noise due to not being properly lubricated and wondered if this could be the issue.

This is the sound and it only happens one time during deceleration. She is letting off the brake and pushing down again in the video.


Any ideas are greatly appreciated.

Thanks!

deadbolt67

Two years later and this gremlin is back.

Any ideas?

RX in NC

Did you lube the emergency brake cable when you first posted about this issue two years ago? If not, what did you do?

deadbolt67

I did not. About two or three days after I initially posted, the sounds just stopped. O.o

roy7777

My 2013 RX450h has that sound, too. I just ignored it then after a couple of weeks it just gone.
There are plenty cases on the forum. Some people said the sound is from the "brake actuator".

BTW, I could hear the sound even when the car was fully stop and I hitted the brake paddle waiting for the red light.

salimshah

Do the due diligence, but Lexus rotors take on surface rust on exposure to moisture. This surface rust makes noise till it get scraped off by braking. for 450H the surface dust lasts longer as the regenerative braking reduces the pad to rotor contact over time.

So if you only hear the squeak after car-wash, rain, going over puddles or long in-active driving time, the surface rust can be one of the reasons .. specially if it goes away after a few [a little more than a few for 450H] stops.

Salim

Droid13

And this can be MUCH worse when the brakes have a lot of wear. The last year before I finally had my rear brakes done, after a wet night my rear brakes sounded like a helicopter crashing into the side of a building for the first couple uses of the day. Maybe more room for the water to get on the pads when mostly worn down.

Golivefree

Did you ever find a solution to this?
My 2011 rx450h is making the exact same sound. It's getting progressively worse. Were you ever able to find a solution? I posted a video of my sound as well in the Google photos link below.

Sometimes the sounds happens even at a complete stop while holding the brake.

https://photos.app.goo.gl/ip3Z4V9cVQhKUENb8

salimshah

If it is getting worse, then it is not rust. You need to either investigate by lifting the side up and checking for the exact source of sound or have some one look into it.
By procrastinating you may make the damage worse and end up spending lot more.

There are advantages in getting input by group sourcing [like posting on the forum] but at times you need to go explore on case by case basis.

Salim

JFarr

I am having the same noise issue on my 2016 RX 450h. I ignored it also and now it is louder than ever and makes the noise eveytime I push the brake peddle. It dosentmatter if I'm moving or parked.
It is coming from the passage side front tire area.

Check out my video of the issue. The car is parked in my garage and engine is not on.

Clutchless

This is probably covered under the Lexus extended warranty program 23LE04 which provides coverage into March 2024 for issues with the brake booster and brake booster pump assemblies. See post 10 in the thread linked below which has a copy of it pasted. Print it out and take it with your car to the Lexus dealer. It covers the 2016 RX450h.
https://www.clublexus.com/forums/hs-...ps-frooze.html