Your Vehicle: 2004 Lexus ES 330 V6-3.3L (3MZ-FE).

The RX 330 uses a timing belt. It will be on the outside end of the engine furthest from the gearbox. It will be hidden behind a plastic bolt on cover used to protect fingers from fast moving parts.
The cars with an internal timing setup use a timing 'chain' which doesn't need changing anywhere near as often.

Summary: Toyota is recalling certain model year 2004 avalon vehicles; 2004 and 2005Camry, Camry Solara, highlander, and sienna vehicles, 2006 highlander hybrid; 2004and 2005 Lexus ES330 and RX330; and 2006 Lexus rx400H vehicles manufactured from June 1, 2004 through March 31, 2005, equipped with the 1mz-fe or 3mz-fe ...7 days ago

2004 Toyota Camry Recalls ' CarComplaints.com

https://www.carcomplaints.com/Toyota/Camry/2004/recalls/..
Recall on camry 2004 Le Google Search

Fix your car right away, by clicking the link
2004 Lexus Es330 Workshop Service Repair Manual Software

1. Lexus RX 330 04 05 06 Radiator A C AC Cooling Fan with ...

   www.ebay.com > ... > Cooling System > Fans & Kits
   eBay $138.25 - ‎In stock
   Lexus Rx 330 04 05 06 Radiator A/C Ac Cooling Fan With Control Module 8925730070 in eBay Motors, ... 2004 2005 2006 04 05 06 LEXUS RX330 , RX 330 ...
2. images for 2005 Lexus RX330 cooling fansReport images

Most cars are set up to run fans anytime AC is on. You may have a thermostat for the fans or a relay which gets hot and fails.

if it was mine, I would buy some "fan belt dressing spray" and spray my fan belts or have them adjusted. first spray them once, if sound stops a few days, have the tension adjusted. if spray does not work the first time, this is not the problem.

pull the cluster of and se whats making the noise

1999 Lexus ES300 (3.0L, VIN F, 5th digit, 1MZFE engine)

Thermostat on 1mz-FE Engine

1. Disconnect the negative battery cable. Wait at least 90 seconds before performing any other work.
2. Drain the engine coolant.
3. Remove the battery.
4. Remove the air cleaner inlet assembly.
5. Remove the air cleaner assembly with hose.
6. Remove the air cleaner bracket.
7. Remove the air cleaner inlet No. 1.
8. Disconnect the radiator hose outlet.
9. Remove the bolt and water inlet pipe.
10. Remove the O-ring from the water inlet pipe.
11. Remove the 3 bolts and water inlet.
12. Remove the thermostat.

Fig. Correct alignment of the thermostat jiggle valve.-1MZ-FE and 3MZ-FE engines

Hope helps (remember to rate and comment this).

yes. This service is recommended by Toyota/Lexus which includes: timing belt, water pump, idler & tensioner pulleys, drivebelts. Typically shop cost $580-$950 depending on their labor charge dealer charges $800+.

Are you talking about the ticking noise or what