mooskie

My 2003 Avalon has the same high pitch sound. It really sounds like an electrical noise, almost like a radio squeal. This alternator diode might be the answer. I have a sthescope and will check this out. Also, the car has gone through two batteries, I blamed that on poor Walmart quality, maybe I will have the altertantor checked out. In my case the noise is a little temperature dependent, it is louder in cold weather, and it quiets down when the engine is hot. Thanks for the post.

My 2003 Avalon rides okay on smooth roads but does not handle larger imperfections in the road very well at all. I bought the car used, it now has 67,000 miles. The suspension feels like it is "weak in the knees". I am going to replace the struts in hope of a firmer ride. Has anyone had experience with KYB (G2), on Monroe sensatrac, or Toyota OEM replacements? Also any advice on replacing the mounts and the spring supports at the same time?