How to Add Coolant: Lexus RX330 (2004-2009) - 2004 Lexus Click to view0:33Adding engine coolant (also known as antifreeze) to your 2004 Lexus RX330 is pretty easy. Engine coolant circulates through your engine to keep it cool in the summer but won't freeze in the winter. Make sure to check your engine when it is cold for an accurate reading. Lexus RX330 Engine Coolant Temperature Sensor Replacement The average cost for a Lexus RX330 engine coolant temperature sensor replacement is between $323 and $386. Labor costs are estimated between $237 and $300 while parts are priced at $86.