2005 RX330 FWD 49k miles. This problem started about 2 years ago. When I accellerate on a freeway onramp, the AC produces a nasty stink. The best I can describe it as is the smell of a hair salon, specifically when a perm is being done. NASTY! This started happening at about 20k miles. Took it to the dealer, they said "replace the AC filter" to the tune of 100$, so I had them do it. They also sprayed ozium into the AC system, and said that condensation accumulates in the AC system, and to turn off the recirculate button whenever possible. Ok, fine. Did that. 10k miles later, same thing. Long story short, the system has been sprayed 5-6 times in the 3 years we've owned the car, we tried turning off the recirc button before shutting the car off (dealer recommended), the cabin filter has been replaced at least 3 times now, and it still stinks on accelleration. It doesn't happen all the time, and up until recently if we turned off the recirc button while getting on the freeway, it was ok. We have been turning off the recirc button everytime before shutting off the car (its been about 5 weeks since the filter was replaced and ozium sprayed by the dealer), and today when the wife got on the freeway (with the recirc button off), she got that same nasty stink. Anyone else have this problem? We have already spoken to the service manager once about this after like the 5th time bringing it in, but it's still a BIG problem. We're 1k away from the warranty expiring, and I want to get this fixed. I'm thinking it's about time to demand a replacement AC system, or call the lexus customer service line (if that'll do anything). HELP!!!!