maxn99
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That's the same annoying noise I have on my 2006 RX 400h. It's the brake actuator. And yes, it will charge and discharge without the engine running. The dealer says it's normal (of course)
Weird Sound From The Hood
in 04 - 09 Lexus RX330 / RX350 / RX400h
Posted
Tilani -
Did you visit the dealer yet? I'm curious to know what they said. Usually they can't duplicate (or hear) the issue. A good way to duplicate it for them is to turn the key to the 'on' position (don't start the car) and pump the brakes over and over.
I notice this noise all the time - and believe me others do too. It's especially noticeable on the 400h when in electric/battery mode cruising through the parking lot. People look at my car like 'what the hell is wrong with it?'. Try driving alongside a wall so you can hear the noise reflected back. It happens ~20% of the time when releasing the brake pedal.