On a gen 3 if you want to be
On a gen 3 if you want to be on the safe side, definitely change the spark plugs, water pump, thermostat, brake fluid, engine coolant, inverter coolant, clean the egr, clean the throttle body, change the transmission fluid, recharge the ac if needed, change pcv, change shocks/struts if needed, all by 100k miles or before.