Help identifying part No. (brake actuator)
#1
Lead Lap
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I've been living with a brake noise for the past 7 months and the frequency & loudness have been going up over the passage of time.
The noise started when the car was cold in the morning I'd hear it from time to time when I fully depress the brake pedal. Now I hear it every time I depress the brake pedal while at complete stop. IT IS ANNOYING.
Now, how to verify it's the actuator?
What needs to be changed? Part names/numbers (if possible)?
A diagram of the brake system parts is here: Click here
I need to know what parts need to be changed as I'm going to order the parts and have them shipped from the US to me. So I want to make sure I get every thing I need to have this issue taken care of.
Side question: pardon my ignorance, but what does the actuator do? And why is it producing this noise?
Thanks in advance.
The noise started when the car was cold in the morning I'd hear it from time to time when I fully depress the brake pedal. Now I hear it every time I depress the brake pedal while at complete stop. IT IS ANNOYING.
Now, how to verify it's the actuator?
What needs to be changed? Part names/numbers (if possible)?
A diagram of the brake system parts is here: Click here
I need to know what parts need to be changed as I'm going to order the parts and have them shipped from the US to me. So I want to make sure I get every thing I need to have this issue taken care of.
Side question: pardon my ignorance, but what does the actuator do? And why is it producing this noise?
Thanks in advance.
Last edited by JFNash; 11-05-10 at 04:37 PM. Reason: Additional question
#2
Driver School Candidate
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I had the same problem with my 2008 LS460L. At first, the dealer told me that it was "just the way the car is." So, I took them for a test drive in my car and then I went for a drive with the same tech in a new car. I pointed out that the new LS didn't make the noise. If the noise isn't there when the car is brand new, it shouldn't be there after a year or two. After I pushed it, I was told that what was called a "Champion Part" was being made for me at the factory in Japan and that it would be here in a month or so. I was told that a new brake actuator was being "hand built" to exact specifications, just for my car. Well, the part came in, the noise disappeared and it stayed that way until I recently traded for a new 2010. As I understand it, Lexus changed the actuator for an updated design, sometime during the 2010 model year. My new car has a build date of 8/10, so I am hoping I don't have the problem again. That said, now that there is a new production part, I would imagine that Lexus will replace it for any customer who squawks about it enough, as long as the car is still under warranty.
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