Backside of the engine in the center freeze plug :0)
Remove and engine block expansion plug. Insert the block heater. Seal the block heater. Attached the wiring harness to the block heater.
The "Related Question" below is an extensive discussion on the 1999-2003 temperature control valve / heater control valve. It is likely the information will be similar to the 1997 / 1998 Windstar
Begin by training the water from your 2003 engine block. Remove the wiring harness from the block heater. Remove the block heater retaining bolts. The block heater will come out. Reverse the process to install your new block heater.
I believe it goes in the front right side of the block on a 4.0 V-6. You have to remove the softplug, but before you do that drain the coolant and then you will be able to install the block heater.
No.
Since approx 2003 the cord for the block heater has to be purchased separately.
There is a cover plate on the front bank of the six that could possibly be the mount for a block heater. I am not aware that Toyota offers a block heater. Maybe.
above brake pedel behind fuse block
The block heater is located near the engine on most cars. This is true also for the 2003 Toyota Rav 4.
The block heater on a 2003 Passat V6 is located in the vehicle's cooling system. Not all vehicles are equipped with this aftermarket engine heating system.
http://www.hyundaiperformance.com/forums/accent-excel-s-coupe/65210-block-heater-location.html
2002/2003 subaru outback does not have one!!!!!!!!