yes, you have. And change new seal too.
lift tailgate and look for two screws and remove them, and then turn the bulb housing right and oull out
remove the pan at the bottom of the transmition. CAREFULLY, peal the filter from the pan gasket and unbolt the two 10mm bolts from the center of the filter and away you go.
The filter is in a filter housing. Remove the plug in the bottom of the housing. The filter housing is then loosened using a specific wrench for that housing type.
remove the radiator, then remove 4 screws that holds the fan ,,done..
I would advise you to check out the Previa site on yahoo. It is an excellent site. Check this site it out http://tarago.blogspot.com/ , it helped a lot.
Cabin air filter is located behind the glove box. Remove glove box[one screw] and pull filter out of blower housing. New filter will have instructions.
remove the radio.and once outside remove the tape deck wich is screw to te radio.
Get a Haynes manual - there's a lot of stuff to take off
look in how to bleed air off cooling system
OIL FILTER IS A CARTRIDGE TYPE , YOU MUST REMOVE THE ALUMINUM HOUSING TO EXPOSE THE FILTER ELEMENT. BELOW ENGINE PASSENEGR SIDE REAR OF LOWER ENGINE BLOCK
hi there the thermostat is located right on the bottom of the engine next to the oil filter. i believe the housing is held with 2x 12mm bolts which once removed (carefull of hot water) you can then remove/replace the thermostat. i would seriously consider taking more advice as the previa cooling system is very very sensitive to air locks and prone to over heat when just filled with coolant
Remove the engine fuse for 10 seconds and put them back simple