my dad got a 99 RX300, its got 90,000 miles. What would he need to change for tuned up??

 

I think this should be moved to the RX forum.

As to answer your question 17gs, you can look up the maintenance requirements on www.lexus.com & register. In short at 90,000 miles: Spark plugs, air filter, fuel filter, PCV valve, timing belt change (should consider replacing the water pump at the same time). Those are the major items at the 90k interval. Good Luck.