I(like every good Prius owner) change my own oil do my own services I have been driving this lik guy 250 miles a day and the thought of changing the transmission fluid and serviceing the electric motors has come to mind is there any preventive maintenance I could/should be preforming??
Changing the fluid is the main DIY, preemptive maintenance. Discussion here: 01 Prius transmission - Toyota Prius Forum : Prius Online Toyota Forums And is 2002 the same as yours? Good how-to here: The Pan that Can: Change Transmission Fluid in 2002 Toyota Prius