I the radiater easy to change on a 1993 Mazda MPV

SOURCE: 2004 mazda mvp firing order

The firing order is 1-4-2-5-3-6. The cylinders are, front bank is from drivers side to passenger, 6-5-4 , and 3-2-1 at the firewall. This is for a 2004 Mazda MPV.

SOURCE: 2001 Mazda MPV upper front oxygen sensor change

I replaced this sensor about 6 months ago. (If this is the sensor that is located near the firewall on the exhaust manifold under the ignition coil.) The only way to easily replace it, is to remove the MAF and air filter assy. then remove the intake plenum, remove the ignition coil, and then you'll have access to the sensor. You'll need a sensor removal socket. If the socket slips around the hex of the sensor, then you'll need to use a regular deepwell socket and cut the cable from the top of the sensor, or use a combination wrench that will fit it.
The most difficult part of removing the intake plenum is getting the nut loose from the EGR valve. DO NOT just remove the two bolts holding it to the intake plenum. It will not line up correctly during re-assembly and may not seal tightly either.
This took about a Saturday to do. You'll need new plenum gaskets to replace the old. While your at it remove the throttle body and clean the carbon from the ports that lead to the EGR valve and replace that gasket as well. The gaskets will run about $30.

SOURCE: I have a Mazda MPV van and its engine light on and

Sounds like an 02 sensor, it reads how much unbured fuel is running through the exhaust and then the computer adjusts the air/fuel mixture accordingly, when the sensor goes out it will lay the fuel to it because the computer isn't getting a read.

SOURCE: how many catalytic converters on a Mazda Mpv 2003

I disagree. I believe there is 2 cats on the 03 MPV. If you look under the car. The 2 pipes from the headers meet right before the muffler. There is 1 cat under the vehicle and another right off the header (looks like an old glass pack muffler).

SOURCE: How do you change the alternator on a 2001 mazda

you must remove axle and plastic cover behind wheel exhaust section 4 bolt crossmember disconnect battery first 3 bolts on block for axle brace 2 bolts hold brace to axle tensioner pulley is reached from below support on jack stand far enough back so it doesnt get in the way good luck may the force be with you