I agree with RX in NC. Having had experience with my DIL's RX (I do all the work on it), what is recommended in the 90k mi. service is ultra conservative. I have only ever read of 1 person who actually had a water pump fail on them, and I am hard pressed to figure out how that happened. I cut the water pump apart that I took out of my DIL's RX at around 127k mi. (I think) and the W/P looked absolutely new. It was definitely original. It is the finest design I have ever seen on a W/P, it is difficult to see how it could ever leak with the multiple seal design (ceramic and rubber w/spring back-up for the 3rd seal) It also uses a double row of ball bearings that sit directly under the T/B which drives it. Even the grease was totally live at that mileage. The only weak point at all is the tensioner idler bearing which is a single row of B/B. The upper idler pulley also has a double row of bearings and the grease was totally live there also. ALL bearings mic'd EXACTLY the same, even though the tensioner bearings were totally dry of grease, they were smooth as glass and like a mirror and mic'd exactly the same as the others. The price that Lexus gave you is indeed a rip-off in my estimation. If you're semi wealthy, I guess they have to eat too, but FILLET MINON??? We have more than one truly excellent and honest independent Lexus shops in this area that I'm sure would do the work for about 60-65% of the price they gave you. And definitely no corner cutting either. That is why they have outstanding reputations.
Good information. Where I live, we don't have many indy's that do Lexus that I would trust, so looks like I have to go with the $1200 service. After reading these posts though, I may wait until 120K, not sure....