Hello Graham, I have a 2010 RX450 and occasionally, when the engine is fully warmed up, the fan seems a bit wheezy. I've managed to extend the warranty till December 2021 and will keep an eye on it. Also, noticed the misting problem in recent poor weather. From what I can gather the warranty company prefer the item to fail completely, wearing out would appear to be fair wear and tear. Hoping it's resolved before December 21! I'll watch this thread with interest.