IS - 1st Gen (2001-2005) Discussion about the IS models up to the 2005 model

Really odd sound diagnosis?

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Old 10-11-10, 06:08 AM
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cknight03
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Default Really odd sound diagnosis?

I have an 02 IS300 with 114k miles on it, and I've rarely had any problems with it until now. I bought it used a few years ago, and it's always had a noise behind the glove box that sounds like liquid whooshing back and forth whenever I change speeds or turn. Thought it was odd, but the Lexus dealer claimed it was normal.

Now, I'm hearing really weird, non-uniform thumping noises and sounds of liquid "squirting" all behind the dash/glovebox, and I can actually feel the floorboard thumping when this happens. It's almost like a hose is banging up against the floorboard. There's nothing leaking that I can see, and this occurs at all speeds.

I initially thought this was something to do with the A/C, but it does this whether it's on or off. Any thoughts or guesses as to what this might be? I have no idea if the first thing that I mentioned has anything to do with the second, and it's a very difficult problem to describe, as I'm sure I have not done it justice. It's definitely the strangest thing I've experienced.
Old 10-11-10, 08:22 AM
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03LexIS300
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Originally Posted by cknight03
I have an 02 IS300 with 114k miles on it, and I've rarely had any problems with it until now. I bought it used a few years ago, and it's always had a noise behind the glove box that sounds like liquid whooshing back and forth whenever I change speeds or turn. Thought it was odd, but the Lexus dealer claimed it was normal.

Now, I'm hearing really weird, non-uniform thumping noises and sounds of liquid "squirting" all behind the dash/glovebox, and I can actually feel the floorboard thumping when this happens. It's almost like a hose is banging up against the floorboard. There's nothing leaking that I can see, and this occurs at all speeds.

I initially thought this was something to do with the A/C, but it does this whether it's on or off. Any thoughts or guesses as to what this might be? I have no idea if the first thing that I mentioned has anything to do with the second, and it's a very difficult problem to describe, as I'm sure I have not done it justice. It's definitely the strangest thing I've experienced.
sounds like your blower assembly or air mix servos
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