If the MPV LX has the "4 seasons" package it will have a second heater and rear climate controls. This may not be true for all model years, but I think it is for 2002-06 models.
2001 Mazda MPV does not have a timing belt, it has two timing chains.
If it has rear heat it has two heater cores. One in the front and one in the back.
it is a two wheel
The 2003 Chevrolet Trailblazers has two heater cores. One operates the front area of the vehicle while the other heats the rear of the vehicle.
In the 1993 Pontiac Transport Van, the two heater cores are interchangeable. To install one heater core in another position, longer hoses might be necessary to reach the necessary hose positions and new holes might need to be drilled.
top left side of dash board, two relays
If your van is equipped with the rear climate control heating/cooling option, then YES, there are two heater cores.See "Related Questions" below for more
Three - two front off each manifold and one in the exhaust pipe.
The '01 Mazda MPV with the 2.5 Liter engine actually has two timing chains, one for each side of the V6 engine. This engine has 2 overhead cams on each side of the engine (DOHC) controlled by the 2 chains.
The 2002 Mazda MPV has two flex pipes that comes from manifold. One of these flex pipes comes with the catalytic converter. I had it changed at Speedy and it cost around $800.00 cost, labour,taxes incl.
If equipped with rear heat it has two. IF front only, one.
Yes a dodge ram van 1500 has two heater cores. The heater core for the rear heat is located on the drivers side between the drivers seat and the first seat in the back. under the window. You will have to remove the side paneling under the window to get to it.