mhoepfin

Just noticed a fairly loud humming noise that sounds almost like it is behind the reat seat. Anyone have an idea?

Searched around and couldn't find anything other than one other post that has a broken link to another thread

Thanks!
Mike

CBG

Maybe a blown speaker. Your subwoofer is behind the rear seats.

mhoepfin

Interesting... humming sound persisted even with the stereo off.

IS_250

iTrader: (2)

fuel pump... I'd be more worried if you didnt hear that sound.

sc430_337

True, but a fuel pump that suddenly becomes much louder can be a sign of pending pump failure.

scdroptop

iTrader: (1)

I vote for the sub woofer being blown. Also what about nav-dvd player humming? Could also be the fuel pump too...they tend to get louder with age/wear.

mhoepfin

Update. Seems to only happen for the first minute or so the car is on. Haven't had too much time to look around, but it may be the nav-dvd, I was thinking the same thing.

IS_250

iTrader: (2)

The humming you hear when you turn the key to the "ON" position is the fuel pump priming. This is normal. I doubt the pump is going bad. The Denso fuel pumps used in toyota and Lexus are pretty durable.