Terrible noise from pushing brakes (not mechanical).
07-31-19, 12:19 PM
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Terrible noise from pushing brakes (not mechanical).
Hi,
I was facing a terribly strange problem. Gentle braking produces a foreign noise from the passenger's right rear (buzzing, rattling, vibration, electrical sound? etc.). I put the phone with the recorder turned on in the trunk. I recorded the sound (clip the file). Sound can be heard 00:04 - 00:08 and 01:18 - 01:27 (until full stop). Uploaded audio to https://vocaroo.com/i/s0g3yGHxmaPp
Sound is not mechanical. When you press it harder, the sound disappears. Shipped to multiple services, hears sound, but can't do anything, doesn't even know where to start ... Most interestingly, it's not a steady sound, you can't always hear the sound when you apply gentle pressure on the brake. Now I hear the sound more and more, so I think the car is degrading. No errors in panel. Cars brakes pads and disc's are good.
Q: Maybe you have a problem like this? Do you know where to start? Got any tips?
Lexus GS 450h 2007
Thank you.
I was facing a terribly strange problem. Gentle braking produces a foreign noise from the passenger's right rear (buzzing, rattling, vibration, electrical sound? etc.). I put the phone with the recorder turned on in the trunk. I recorded the sound (clip the file). Sound can be heard 00:04 - 00:08 and 01:18 - 01:27 (until full stop). Uploaded audio to https://vocaroo.com/i/s0g3yGHxmaPp
Sound is not mechanical. When you press it harder, the sound disappears. Shipped to multiple services, hears sound, but can't do anything, doesn't even know where to start ... Most interestingly, it's not a steady sound, you can't always hear the sound when you apply gentle pressure on the brake. Now I hear the sound more and more, so I think the car is degrading. No errors in panel. Cars brakes pads and disc's are good.
Q: Maybe you have a problem like this? Do you know where to start? Got any tips?
Lexus GS 450h 2007
Thank you.
07-31-19, 12:28 PM
#2
Something to do with the regenerative braking system/ battery mb?
07-31-19, 12:35 PM
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Well, if I am not mistaken in applying the gentle brakes, the machine is electrically braked (regenerative braking). However, no errors are left in the panel. the first thought was about regenerative braking, but how to check it and make sure this sound is precisely because of it. I took this machine to several services that couldn't help it :/
08-05-19, 06:35 AM
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Nobody know this kind of problem? Nobody have this problem? Can someone help please. This soubd is crazy and so annoying. I dont understand where should i start looking....
08-12-19, 08:31 PM
#5
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I will say in all my years of working on cars I have never heard one make noises like this. I should also state I have never worked on a hybrid. I'm assuming that the regenerative braking system is a solid explanation of a possible avenue to take when trying to figure out what this noise is coming from.
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