Loud high-pitched noise when brakes were even a tiny bit wet was extremely distracting and humiliating in traffic, I didn't figure out what the actual problem was until I found out what the technical service bulletins were. My dealership Toyota of Dallas definitely knew it was a problem and never bothered to fix it (because they're con-artists), I bought the car on a rainy day but I didn't drive it slowly during the test drive. This issue happens in stop and go traffic when you're braking gently at lower speeds, which I do a lot of.