Passenger side, near the firewall. It is not difficult to replace, it is just very difficult to get to.
how to replace a heater matrix in a toyota previa
The Toyota Camry block heater is located on the front of the engine block. You can follow the block heater cord to the block heater.
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Remove the heater control valve and replace it.
The block heater is located near the engine on most cars. This is true also for the 2003 Toyota Rav 4.
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follow the 2 hoses that go into the firewall-drivers side hose should be the heater core--on the 95 T100 it is located behind the controls for the heat and air--
oil barring on 1998 Toyota Avalon blower motor?
you have to remove the dashboard top. It is located in the right hand side of the dash. It is a little work but you can get it out.
You may have a clogged heater core, or a leak in the system somewhere. Take your car to a mechanic who can replace the heater core or diagnose the leak.
Fairly difficult. They are easily replaced, but hard to get too.
behind the dashboard on the passengers side